{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99138", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.395Z", "datePublished": "2026-10-28T10:34:49.993Z", "dateUpdated": "2026-10-28T10:34:49.993Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-28T10:34:49.993Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: fix use-after-free in do_tcp_getsockopt(TCP_CC_INFO)\n\ndo_tcp_getsockopt() reads icsk->icsk_ca_ops and dereferences the\nget_info function pointer without rcu_read_lock(). With BPF struct_ops\ncongestion control, ca_ops can point to dynamically allocated memory\nthat is freed concurrently, resulting in a use-after-free when the\nkernel dereferences or calls through the stale pointer.\n\n BUG: KASAN: slab-use-after-free in do_tcp_getsockopt+0x2037/0x23e0\n Read of size 8 at addr ffff888013701258 by task exploit/149\n do_tcp_getsockopt+0x2037/0x23e0 (net/ipv4/tcp.c:4564)\n tcp_getsockopt+0x91/0xf0\n __sys_getsockopt+0xf7/0x170\n\nFix this by wrapping the ca_ops load and get_info call within\nrcu_read_lock()/rcu_read_unlock(), and using READ_ONCE() to load\nthe icsk_ca_ops pointer."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/tcp.c", "net/ipv4/tcp_dctcp.c"], "versions": [{"version": "0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2", "lessThan": "86814e5370068ec2bf0caa6e6d55c3e5bfc6c324", "status": "affected", "versionType": "git"}, {"version": "0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2", "lessThan": "39aa489e85752f9de214edb0f85e4d578e57af29", "status": "affected", "versionType": "git"}, {"version": "0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2", "lessThan": "385e474086c2e7e29e2dded690be40dc273e20ee", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/tcp.c", "net/ipv4/tcp_dctcp.c"], "versions": [{"version": "5.6", "status": "affected"}, {"version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.59", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.13", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.18.59"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "7.2.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/86814e5370068ec2bf0caa6e6d55c3e5bfc6c324"}, {"url": "https://git.kernel.org/stable/c/39aa489e85752f9de214edb0f85e4d578e57af29"}, {"url": "https://git.kernel.org/stable/c/385e474086c2e7e29e2dded690be40dc273e20ee"}], "title": "tcp: fix use-after-free in do_tcp_getsockopt(TCP_CC_INFO)", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv4/tcp.c", "net/ipv4/tcp_dctcp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "86814e5370068ec2bf0caa6e6d55c3e5bfc6c324", "status": "affected", "version": "0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2", "versionType": "git"}, {"lessThan": "39aa489e85752f9de214edb0f85e4d578e57af29", "status": "affected", "version": "0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2", "versionType": "git"}, {"lessThan": "385e474086c2e7e29e2dded690be40dc273e20ee", "status": "affected", "version": "0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ipv4/tcp.c", "net/ipv4/tcp_dctcp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.6"}, {"lessThan": "5.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.59", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.13", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: fix use-after-free in do_tcp_getsockopt(TCP_CC_INFO)\n\ndo_tcp_getsockopt() reads icsk->icsk_ca_ops and dereferences the\nget_info function pointer without rcu_read_lock(). With BPF struct_ops\ncongestion control, ca_ops can point to dynamically allocated memory\nthat is freed concurrently, resulting in a use-after-free when the\nkernel dereferences or calls through the stale pointer.\n\n BUG: KASAN: slab-use-after-free in do_tcp_getsockopt+0x2037/0x23e0\n Read of size 8 at addr ffff888013701258 by task exploit/149\n do_tcp_getsockopt+0x2037/0x23e0 (net/ipv4/tcp.c:4564)\n tcp_getsockopt+0x91/0xf0\n __sys_getsockopt+0xf7/0x170\n\nFix this by wrapping the ca_ops load and get_info call within\nrcu_read_lock()/rcu_read_unlock(), and using READ_ONCE() to load\nthe icsk_ca_ops pointer."}], "id": "CVE-2026-99138", "lastModified": "2026-10-28T11:17:33.740", "metrics": {}, "published": "2026-10-28T11:17:33.740", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/385e474086c2e7e29e2dded690be40dc273e20ee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/39aa489e85752f9de214edb0f85e4d578e57af29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/86814e5370068ec2bf0caa6e6d55c3e5bfc6c324"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2,86814e5370068ec2bf0caa6e6d55c3e5bfc6c324)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2,39aa489e85752f9de214edb0f85e4d578e57af29)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2,385e474086c2e7e29e2dded690be40dc273e20ee)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.59,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.13,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2,86814e5370068ec2bf0caa6e6d55c3e5bfc6c324)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2,39aa489e85752f9de214edb0f85e4d578e57af29)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2,385e474086c2e7e29e2dded690be40dc273e20ee)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.59,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.13,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-28T12:15:14.881576+00:00", "updated": "2026-10-28T12:45:15.916044+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}