{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45966", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.089Z", "datePublished": "2026-05-27T12:18:24.300Z", "dateUpdated": "2026-05-27T12:18:24.300Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:18:24.300Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix NULL pointer dereference in __unix_needs_revalidation\n\nWhen receiving file descriptors via SCM_RIGHTS, both the socket pointer\nand the socket's sk pointer can be NULL during socket setup or teardown,\ncausing NULL pointer dereferences in __unix_needs_revalidation().\n\nThis is a regression in AppArmor 5.0.0 (kernel 6.17+) where the new\n__unix_needs_revalidation() function was added without proper NULL checks.\n\nThe crash manifests as:\n BUG: kernel NULL pointer dereference, address: 0x0000000000000018\n RIP: aa_file_perm+0xb7/0x3b0 (or +0xbe/0x3b0, +0xc0/0x3e0)\n Call Trace:\n apparmor_file_receive+0x42/0x80\n security_file_receive+0x2e/0x50\n receive_fd+0x1d/0xf0\n scm_detach_fds+0xad/0x1c0\n\nThe function dereferences sock->sk->sk_family without checking if either\nsock or sock->sk is NULL first.\n\nAdd NULL checks for both sock and sock->sk before accessing sk_family."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["security/apparmor/file.c"], "versions": [{"version": "88fec3526e84123997ecebd6bb6778eb4ce779b7", "lessThan": "fea017a7f6abe179decf575a2d8464c74edb3964", "status": "affected", "versionType": "git"}, {"version": "88fec3526e84123997ecebd6bb6778eb4ce779b7", "lessThan": "e85bc9101afc4202aa2269967ce9d3ffbecd0994", "status": "affected", "versionType": "git"}, {"version": "88fec3526e84123997ecebd6bb6778eb4ce779b7", "lessThan": "e2938ad00b21340c0362562dfedd7cfec0554d67", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["security/apparmor/file.c"], "versions": [{"version": "6.17", "status": "affected"}, {"version": "0", "lessThan": "6.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.17", "versionEndExcluding": "6.18.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fea017a7f6abe179decf575a2d8464c74edb3964"}, {"url": "https://git.kernel.org/stable/c/e85bc9101afc4202aa2269967ce9d3ffbecd0994"}, {"url": "https://git.kernel.org/stable/c/e2938ad00b21340c0362562dfedd7cfec0554d67"}], "title": "apparmor: fix NULL pointer dereference in __unix_needs_revalidation", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix NULL pointer dereference in __unix_needs_revalidation\n\nWhen receiving file descriptors via SCM_RIGHTS, both the socket pointer\nand the socket's sk pointer can be NULL during socket setup or teardown,\ncausing NULL pointer dereferences in __unix_needs_revalidation().\n\nThis is a regression in AppArmor 5.0.0 (kernel 6.17+) where the new\n__unix_needs_revalidation() function was added without proper NULL checks.\n\nThe crash manifests as:\n BUG: kernel NULL pointer dereference, address: 0x0000000000000018\n RIP: aa_file_perm+0xb7/0x3b0 (or +0xbe/0x3b0, +0xc0/0x3e0)\n Call Trace:\n apparmor_file_receive+0x42/0x80\n security_file_receive+0x2e/0x50\n receive_fd+0x1d/0xf0\n scm_detach_fds+0xad/0x1c0\n\nThe function dereferences sock->sk->sk_family without checking if either\nsock or sock->sk is NULL first.\n\nAdd NULL checks for both sock and sock->sk before accessing sk_family."}], "id": "CVE-2026-45966", "lastModified": "2026-05-27T14:48:03.013", "metrics": {}, "published": "2026-05-27T14:17:13.460", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e2938ad00b21340c0362562dfedd7cfec0554d67"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e85bc9101afc4202aa2269967ce9d3ffbecd0994"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fea017a7f6abe179decf575a2d8464c74edb3964"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{"created": "2026-05-27T17:30:38.290256+00:00", "updated": "2026-05-27T17:30:38.290267+00:00", "vendors": [], "weaknesses": ["CWE-476"]}