310 lines
15 KiB
JSON
310 lines
15 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-2026-64002",
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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": "2026-07-19T07:54:57.026Z",
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"datePublished": "2026-07-19T14:56:19.495Z",
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"dateUpdated": "2026-10-19T20:18:02.288Z"
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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": "2026-08-05T12:38:02.672Z"
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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\nipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()\n\nipv4_sysctl_exit_net() is currently freeing net->ipv4.sysctl_local_reserved_ports\ntoo soon.\n\nOnly after unregister_net_sysctl_table() we can be sure no threads can possibly\nuse the sysctls, including /proc/sys/net/ipv4/ip_local_reserved_ports."
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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 - Exploitation requires local syscalls—network namespace teardown via unshare/setns/put_net, sysctl access to /proc/sys/net/ipv4/ip_local_reserved_ports, and/or local socket bind/connect—not remote packet delivery.\nAC:L - The attacker can control both sides of the race by concurrently tearing down a network namespace while hammering the sysctl or triggering socket port selection in that namespace.\nPR:L - An unprivileged local user can reach this via user namespaces (CAP_SYS_ADMIN within the user_ns for CLONE_NEWNET) and world-writable sysctl access (mode 0644) during namespace destruction.\nUI:N - No victim interaction is required beyond the attacker's own concurrent namespace teardown and sysctl or socket activity.\nS:U - The UAF corrupts kernel heap memory within the same kernel security domain; it is standard local kernel memory corruption, not a VM/hypervisor boundary escape.\nC:H - Freed 8 KiB bitmap memory remains reachable via sysctl reads (find_next_bit) and inet_is_local_reserved_port() (test_bit), enabling heap information disclosure through a use-after-free.\nI:H - Sysctl writes via proc_do_large_bitmap perform bitmap_copy/bitmap_or into the freed allocation, providing a heap write primitive exploitable for control-flow hijacking.\nA:H - Concurrent access to the freed bitmap can cause kernel oops/panic from invalid memory access, and UAF exploitation inherently threatens kernel availability."
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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/ipv4/sysctl_net_ipv4.c"
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],
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"versions": [
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{
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"version": "122ff243f5f104194750ecbc76d5946dd1eec934",
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"lessThan": "ecf45080a4d3f4526cacb8b14060fe3b49a6913b",
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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": "122ff243f5f104194750ecbc76d5946dd1eec934",
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"lessThan": "a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06c",
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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": "122ff243f5f104194750ecbc76d5946dd1eec934",
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"lessThan": "5b23a2ff379e70b6b9ff744a972b63e1f8f4d996",
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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": "122ff243f5f104194750ecbc76d5946dd1eec934",
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"lessThan": "8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57",
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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": "122ff243f5f104194750ecbc76d5946dd1eec934",
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"lessThan": "6512c57c4638ddec113bf42439361ba85a12048d",
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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": "122ff243f5f104194750ecbc76d5946dd1eec934",
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"lessThan": "a7f4eefb6e1458431eef9fa20fb363320d185f76",
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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": "122ff243f5f104194750ecbc76d5946dd1eec934",
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"lessThan": "155f90be5ee8be5b110ebc0b7da33c54c83b0208",
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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": "122ff243f5f104194750ecbc76d5946dd1eec934",
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"lessThan": "87a1e0fe7776da7ab411be332b4be58ac8840d10",
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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/ipv4/sysctl_net_ipv4.c"
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],
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"versions": [
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{
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"version": "3.16",
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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": "3.16",
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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": "5.10.259",
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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": "5.15.210",
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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": "6.1.176",
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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": "6.6.143",
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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": "6.12.93",
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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": "6.18.35",
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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": "7.0.12",
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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": "3.16",
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"versionEndExcluding": "5.10.259"
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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": "3.16",
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"versionEndExcluding": "5.15.210"
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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": "3.16",
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"versionEndExcluding": "6.1.176"
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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": "3.16",
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"versionEndExcluding": "6.6.143"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.12.93"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.16",
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"versionEndExcluding": "7.0.12"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.16",
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"versionEndExcluding": "7.1"
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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/ecf45080a4d3f4526cacb8b14060fe3b49a6913b"
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},
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{
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"url": "https://git.kernel.org/stable/c/a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06c"
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},
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{
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"url": "https://git.kernel.org/stable/c/5b23a2ff379e70b6b9ff744a972b63e1f8f4d996"
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},
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{
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"url": "https://git.kernel.org/stable/c/8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57"
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},
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{
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"url": "https://git.kernel.org/stable/c/6512c57c4638ddec113bf42439361ba85a12048d"
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},
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{
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"url": "https://git.kernel.org/stable/c/a7f4eefb6e1458431eef9fa20fb363320d185f76"
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},
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{
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"url": "https://git.kernel.org/stable/c/155f90be5ee8be5b110ebc0b7da33c54c83b0208"
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},
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{
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"url": "https://git.kernel.org/stable/c/87a1e0fe7776da7ab411be332b4be58ac8840d10"
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}
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],
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"title": "ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()",
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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-2026-64002",
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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": "2026-10-16T15:35:00.962668Z"
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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": "2026-10-19T20:18:02.288Z"
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}
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}
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]
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}
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} |