369 lines
19 KiB
JSON
369 lines
19 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-68162",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-07-30T09:28:09.372Z",
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"datePublished": "2026-08-10T11:59:29.099Z",
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"dateUpdated": "2026-10-19T20:58:55.689Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-23T12:46:01.222Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: avoid auth_enable sysctl UAF during netns teardown\n\nproc_sctp_do_auth() updates the SCTP control socket after changing\nnet.sctp.auth_enable. The handler gets the per-net SCTP state from\nctl->data, so an already opened sysctl file can still target a network\nnamespace while that namespace is being torn down.\n\nSCTP previously registered its per-net sysctls from sctp_defaults_init(),\nwhile the control socket is created later from sctp_ctrlsock_init(). This\nexposed a window during initialization where auth_enable was writable\nbefore net->sctp.ctl_sock existed, and a teardown window where auth_enable\nstayed writable after inet_ctl_sock_destroy() had released the control\nsocket.\n\nMove the per-net SCTP sysctl registration into sctp_ctrlsock_init() after\nsctp_ctl_sock_init() succeeds, and unregister the sysctl table before\ndestroying the control socket in sctp_ctrlsock_exit(). If sysctl\nregistration fails after the control socket was created, destroy the\ncontrol socket in the same init path.\n\nMake sctp_sysctl_net_unregister() tolerate a missing header and clear the\nsaved pointer so init-error and exit paths can safely share the unregister\nhelper."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The bug is triggered only by writing the per-net sysctl net.sctp.auth_enable via /proc/sys (proc_sctp_do_auth); it is not reachable from SCTP packet receive, sockets, or other remote protocol paths.\nAC:L - An attacker can open the sysctl file, concurrently destroy the target network namespace, and repeatedly write during teardown; pernet exit destroys ctl_sock before unregistering sysctls, and the attacker controls both sides of that race.\nPR:L - Exploitation requires writing a mode 0644 sysctl in a network namespace; an unprivileged host user with CAP_NET_ADMIN via user namespaces can create a netns, become namespace root, and write net/sctp/auth_enable without init-namespace privileges.\nUI:N - No victim interaction is required beyond the attacker opening the sysctl and triggering namespace teardown in their own threads or processes.\nS:U - Impact is confined to kernel memory corruption and privilege escalation within the same host/kernel security domain; it does not cross VM, container, or IOMMU boundaries by itself.\nC:H - proc_sctp_do_auth dereferences net->sctp.ctl_sock after inet_ctl_sock_destroy; lock_sock and sctp_sk(sk)->ep access freed socket/endpoint memory, a use-after-free that can disclose or infer heap contents.\nI:H - On a successful write, the handler sets sctp_sk(sk)->ep->auth_enable on a freed endpoint object, giving a controlled heap write primitive that can be developed into arbitrary kernel modification or code execution.\nA:H - Use-after-free on the SCTP control socket/endpoint during sysctl processing can cause kernel oops/panic from lock_sock or ep access on freed memory, even when full exploitation is not attempted."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/sctp/protocol.c",
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"net/sctp/sysctl.c"
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],
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"versions": [
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{
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"version": "10c869a52f266e40f548cc3c565d14930a5edafc",
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"lessThan": "19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "dc583e7e5f8515ca489c0df28e4362a70eade382",
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"lessThan": "ceb7190b5c873d4a1267a1600c5aa52c600e929f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bd2a2939423566c654545fa3e96a656662a0af9e",
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"lessThan": "fd66854a22661929245f3d2b244c432bc8b1a150",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1b67030d39f2b00f94ac1f0af11ba6657589e4d3",
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"lessThan": "158f3cc332dc53f43ec20060233d7c3cecd6d912",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6",
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"lessThan": "66700c0719675e0e118ae83b2d7168dacd69dd3d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c184bc621e3cef03ac9ba81a50dda2dae6a21d36",
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"lessThan": "626bda8cfe43dff19a9833ff6ba055a817b5455c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "15649fd5415eda664ef35780c2013adeb5d9c695",
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"lessThan": "be6aae9d1b91c603adb35872d37d40e83daf8758",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "15649fd5415eda664ef35780c2013adeb5d9c695",
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"lessThan": "a50e73488e0bbdd262b3be3c9a1d8dd078382381",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "15649fd5415eda664ef35780c2013adeb5d9c695",
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"lessThan": "f8d5e7846025f4ab15a461235f8ebae9094a361a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5.4.290",
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"lessThan": "5.4.292",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.10.234",
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"lessThan": "5.10.266",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.15.177",
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"lessThan": "5.15.217",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.1.125",
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"lessThan": "6.1.184",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.6.72",
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"lessThan": "6.6.151",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.12.10",
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"lessThan": "6.12.101",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/sctp/protocol.c",
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"net/sctp/sysctl.c"
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],
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"versions": [
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{
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"version": "6.13",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.13",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.4.292",
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"lessThanOrEqual": "5.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.266",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.217",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.184",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.151",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.101",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.42",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.6",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.4.290",
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"versionEndExcluding": "5.4.292"
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4"
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},
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{
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"url": "https://git.kernel.org/stable/c/ceb7190b5c873d4a1267a1600c5aa52c600e929f"
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},
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{
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"url": "https://git.kernel.org/stable/c/fd66854a22661929245f3d2b244c432bc8b1a150"
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},
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{
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"url": "https://git.kernel.org/stable/c/158f3cc332dc53f43ec20060233d7c3cecd6d912"
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},
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{
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"url": "https://git.kernel.org/stable/c/66700c0719675e0e118ae83b2d7168dacd69dd3d"
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},
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{
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"url": "https://git.kernel.org/stable/c/626bda8cfe43dff19a9833ff6ba055a817b5455c"
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},
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{
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"url": "https://git.kernel.org/stable/c/be6aae9d1b91c603adb35872d37d40e83daf8758"
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},
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{
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"url": "https://git.kernel.org/stable/c/a50e73488e0bbdd262b3be3c9a1d8dd078382381"
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},
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{
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"url": "https://git.kernel.org/stable/c/f8d5e7846025f4ab15a461235f8ebae9094a361a"
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}
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],
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"title": "sctp: avoid auth_enable sysctl UAF during netns teardown",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-68162",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:45:25.940723Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-416",
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"description": "CWE-416 Use After Free"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T20:58:55.689Z"
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}
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}
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]
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}
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} |