214 lines
10 KiB
JSON
214 lines
10 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-2026-99139",
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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": "2026-09-25T10:25:14.395Z",
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"datePublished": "2026-10-28T10:34:50.674Z",
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"dateUpdated": "2026-10-30T12:42:11.824Z"
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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": "2026-10-30T12:42:11.824Z"
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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\ntcp: fix use-after-free in do_tcp_getsockopt(TCP_CONGESTION)\n\ndo_tcp_getsockopt() reads icsk->icsk_ca_ops->name without holding\nrcu_read_lock(). Since commit 0baf26b0fcd7 (\"bpf: tcp: Support\ntcp_congestion_ops in bpf\"), icsk_ca_ops can point to dynamically\nallocated BPF struct_ops memory that may be freed concurrently via\nsetsockopt(TCP_CONGESTION), leading to a use-after-free.\n\n BUG: KASAN: slab-use-after-free in _copy_to_user+0x37/0x60\n Read of size 16 at addr ffff888013505260 by task exploit/149\n _copy_to_user+0x37/0x60\n do_tcp_getsockopt+0x158a/0x2460 (net/ipv4/tcp.c:4585)\n tcp_getsockopt+0x91/0xf0\n __sys_getsockopt+0xf7/0x170\n\nFix this by holding rcu_read_lock() around the ca_ops->name access,\nusing READ_ONCE() to load icsk_ca_ops, and copying the name to a\nstack buffer before releasing the lock. Also annotate the relevant\nicsk_ca_ops stores with WRITE_ONCE() to fix the accompanying KCSAN\ndata-race issue."
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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/tcp.c",
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"net/ipv4/tcp_cong.c",
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"net/ipv4/tcp_dctcp.c",
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"net/ipv4/tcp_minisocks.c",
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"net/ipv4/tcp_output.c"
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],
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"versions": [
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{
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"version": "0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2",
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"lessThan": "a60e62705c17534d6b6539de7b3a40c259e6827f",
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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": "0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2",
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"lessThan": "4b0930d66dde0a1d1898f0edbbb5496c4dfa5f03",
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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": "0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2",
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"lessThan": "08dc5c62c09653d1c4ba67a009beb138486c2604",
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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": "0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2",
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"lessThan": "c1804ef016392dd91267d2207ee43b1de34302ca",
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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": "0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2",
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"lessThan": "a8e45471afa230c1431c26c8e99ec24377e3b514",
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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": "0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2",
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"lessThan": "5271b79b7ad68dcb222e893773f92bdabf7750f3",
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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/tcp.c",
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"net/ipv4/tcp_cong.c",
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"net/ipv4/tcp_dctcp.c",
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"net/ipv4/tcp_minisocks.c",
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"net/ipv4/tcp_output.c"
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],
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"versions": [
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{
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"version": "5.6",
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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": "5.6",
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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": "6.1.191",
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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": "6.6.161",
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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": "6.12.115",
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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": "6.18.59",
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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": "7.2.13",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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": "5.6",
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"versionEndExcluding": "6.1.191"
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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": "5.6",
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"versionEndExcluding": "6.6.161"
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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": "5.6",
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"versionEndExcluding": "6.12.115"
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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": "5.6",
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"versionEndExcluding": "6.18.59"
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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": "5.6",
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"versionEndExcluding": "7.2.13"
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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": "5.6",
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"versionEndExcluding": "7.3"
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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/a60e62705c17534d6b6539de7b3a40c259e6827f"
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},
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{
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"url": "https://git.kernel.org/stable/c/4b0930d66dde0a1d1898f0edbbb5496c4dfa5f03"
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},
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{
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"url": "https://git.kernel.org/stable/c/08dc5c62c09653d1c4ba67a009beb138486c2604"
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},
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{
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"url": "https://git.kernel.org/stable/c/c1804ef016392dd91267d2207ee43b1de34302ca"
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},
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{
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"url": "https://git.kernel.org/stable/c/a8e45471afa230c1431c26c8e99ec24377e3b514"
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},
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{
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"url": "https://git.kernel.org/stable/c/5271b79b7ad68dcb222e893773f92bdabf7750f3"
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}
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],
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"title": "tcp: fix use-after-free in do_tcp_getsockopt(TCP_CONGESTION)",
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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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} |