264 lines
13 KiB
JSON
264 lines
13 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-2026-46206",
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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": "2026-05-13T15:03:33.105Z",
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"datePublished": "2026-05-28T09:40:23.993Z",
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"dateUpdated": "2026-08-05T12:30:28.363Z"
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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": "2026-08-05T12:30:28.363Z"
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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\nbatman-adv: reject new tp_meter sessions during teardown\n\nPrevent tp_meter from starting new sender or receiver sessions after\nmesh_state has left BATADV_MESH_ACTIVE."
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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 vulnerable code is reached via the netlink BATADV_CMD_TP_METER command (local genl socket) or via mesh packets injected into a locally-set-up batadv interface; batman-adv is an L2 mesh protocol, not internet-routable, so this requires local access rather than Network.\nAC:L - This is a teardown race, but a local attacker controls both sides — repeatedly creating/destroying the soft interface (driving mesh_free/batadv_tp_stop_all) in one thread while starting tp_meter sessions in another — and can retry the loop indefinitely until the window is won.\nPR:L - TP_METER is gated by GENL_UNS_ADMIN_PERM (namespaced CAP_NET_ADMIN), which an unprivileged user obtains via `unshare -Urn`, then creates their own batadv mesh interface; no real root is required.\nUI:N - The attacker drives both the session start and the interface teardown themselves; no action by any other user is needed.\nS:U - The use-after-free corrupts kernel heap objects within the kernel's own security authority; there is no crossing of a VM/IOMMU/sandbox boundary.\nC:H - The surviving session holds a dangling pointer to freed tp_vars/bat_priv memory; reclaiming and reading that freed object enables disclosure of kernel memory contents.\nI:H - The use-after-free permits heap spraying of the freed object and a controlled write through the stale timer/kthread/work references, enabling memory corruption and potential control-flow hijack.\nA:H - A timer/kthread/delayed work operating on freed mesh structures reliably triggers an oops/panic, crashing the kernel."
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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/batman-adv/tp_meter.c"
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],
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"versions": [
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{
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"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e",
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"lessThan": "0a7a840074c9ca5ebffc9c52358c8ea55828ec71",
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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": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e",
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"lessThan": "dcff44644bb518598b1a6be722706d6174b2f6a1",
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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": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e",
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"lessThan": "52e6ec3e972cf27792cc1559874dbee19f286869",
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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": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e",
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"lessThan": "e4a3c4a4c8f6efd243c3e448c05b7bebcbf7b3b6",
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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": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e",
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"lessThan": "ff93f86ecbb50a4709c403fc279a396e308edde5",
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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": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e",
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"lessThan": "e1e2194cc725ec1d41f9412496212f0fa0519c36",
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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": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e",
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"lessThan": "ca39545cf07c142b39d474a1439a046bf28def3d",
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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": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e",
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"lessThan": "3243543592425beec83d453793e9d27caa0d8e66",
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"status": "affected",
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"versionType": "git"
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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/batman-adv/tp_meter.c"
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],
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"versions": [
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{
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"version": "4.8",
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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": "4.8",
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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": "5.10.258",
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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": "5.15.209",
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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": "6.1.175",
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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": "6.6.140",
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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": "6.12.90",
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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": "6.18.32",
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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": "7.0.9",
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"lessThanOrEqual": "7.0.*",
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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",
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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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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.8",
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"versionEndExcluding": "5.10.258"
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},
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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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"versionStartIncluding": "4.8",
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"versionEndExcluding": "5.15.209"
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},
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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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"versionStartIncluding": "4.8",
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"versionEndExcluding": "6.1.175"
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},
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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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"versionStartIncluding": "4.8",
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"versionEndExcluding": "6.6.140"
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},
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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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"versionStartIncluding": "4.8",
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"versionEndExcluding": "6.12.90"
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},
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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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"versionStartIncluding": "4.8",
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"versionEndExcluding": "6.18.32"
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},
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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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"versionStartIncluding": "4.8",
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"versionEndExcluding": "7.0.9"
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},
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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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"versionStartIncluding": "4.8",
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"versionEndExcluding": "7.1"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/0a7a840074c9ca5ebffc9c52358c8ea55828ec71"
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},
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{
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"url": "https://git.kernel.org/stable/c/dcff44644bb518598b1a6be722706d6174b2f6a1"
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},
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{
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"url": "https://git.kernel.org/stable/c/52e6ec3e972cf27792cc1559874dbee19f286869"
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},
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{
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"url": "https://git.kernel.org/stable/c/e4a3c4a4c8f6efd243c3e448c05b7bebcbf7b3b6"
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},
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{
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"url": "https://git.kernel.org/stable/c/ff93f86ecbb50a4709c403fc279a396e308edde5"
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},
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{
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"url": "https://git.kernel.org/stable/c/e1e2194cc725ec1d41f9412496212f0fa0519c36"
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},
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{
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"url": "https://git.kernel.org/stable/c/ca39545cf07c142b39d474a1439a046bf28def3d"
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},
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{
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"url": "https://git.kernel.org/stable/c/3243543592425beec83d453793e9d27caa0d8e66"
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}
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],
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"title": "batman-adv: reject new tp_meter sessions during 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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}
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} |