{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-72459", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.932Z", "datePublished": "2026-08-15T05:57:04.794Z", "dateUpdated": "2026-08-17T05:44:25.217Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:44:25.217Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: aa_label_alloc use aa_label_free on alloc failure\n\naa_label_alloc() allocates a secid before allocating or taking the label\nproxy. If the later proxy step fails, the error path only freed the label\nmemory, leaking any resources initialized by aa_label_init().\n\nUse aa_label_free() on the failure path so partially initialized labels\nrelease their secid and other label resources before the backing memory is\nfreed." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is in AppArmor LSM label allocation reached only through local kernel entry points (open/read/exec, unix socket mediation, change_hat/change_profile procattr) on AppArmor-enabled systems, not via remote network packet handling.\nAC:L - Triggering proxy allocation failure after secid allocation requires memory pressure, but an attacker can reliably induce kmalloc/GFP_ATOMIC exhaustion locally (memfd, large mappings, stress) while driving aa_label_merge through routine file or socket operations.\nPR:L - Any unprivileged local process running under AppArmor (default on Ubuntu, Debian, SUSE, Android) can reach aa_label_merge/aa_label_alloc through normal permitted file access, exec domain transitions, or unix-socket mediation without real-root or CAP_MAC_ADMIN.\nUI:N - Exploitation requires no victim or administrator interaction; the attacker uses only their own credentials and syscalls to create memory pressure and invoke AppArmor label-merge paths.\nS:U - Impact is kernel memory corruption, information disclosure, and denial of service within the host kernel security domain; it does not cross a VM, container, or IOMMU security boundary by itself.\nC:H - The error path called kfree() without aa_free_secid(), leaving the global secid xarray pointing at freed aa_label memory; aa_secid_to_label()/apparmor_secid_to_secctx() then dereference attacker-influenced freed slab for arbitrary kernel memory reads.\nI:H - Orphaned secid entries retain dangling aa_label pointers whose vec/profile fields can be reclaimed and sprayed; UAF traversal of those structures is a standard path to heap control and arbitrary kernel writes or code execution.\nA:H - Dereferencing stale label/profile pointers can cause kernel oops/panic, and each successful trigger permanently leaks a secid slot until reboot, eventually exhausting the global secid table and denying all future AppArmor label creation system-wide." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "security/apparmor/label.c" ], "versions": [ { "version": "f1bd904175e8190ce14aedee37e207ab51fe3b30", "lessThan": "b14fbacad77d64594228983ec20d61a224f3f491", "status": "affected", "versionType": "git" }, { "version": "f1bd904175e8190ce14aedee37e207ab51fe3b30", "lessThan": "b5a9da5d36162d34db0f36abb15420e295176793", "status": "affected", "versionType": "git" }, { "version": "f1bd904175e8190ce14aedee37e207ab51fe3b30", "lessThan": "7cb69e109610bba500e1ecb870f7988a4717208a", "status": "affected", "versionType": "git" }, { "version": "f1bd904175e8190ce14aedee37e207ab51fe3b30", "lessThan": "cc2192899d502e3321e60cf1e91421e7309d089c", "status": "affected", "versionType": "git" }, { "version": "f1bd904175e8190ce14aedee37e207ab51fe3b30", "lessThan": "bf310b044e85d4de670c94295c5d8e4c5bc5e7bc", "status": "affected", "versionType": "git" }, { "version": "f1bd904175e8190ce14aedee37e207ab51fe3b30", "lessThan": "ae02e603c0b39b29f3ce6fe3efe01b286af1a2a4", "status": "affected", "versionType": "git" }, { "version": "f1bd904175e8190ce14aedee37e207ab51fe3b30", "lessThan": "6d91479174240f39e9edea250d95fa08c678a207", "status": "affected", "versionType": "git" }, { "version": "f1bd904175e8190ce14aedee37e207ab51fe3b30", "lessThan": "654fe7505dc6889724d4094fa64f89991afabfc3", "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/label.c" ], "versions": [ { "version": "4.13", "status": "affected" }, { "version": "0", "lessThan": "4.13", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "4.13", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b14fbacad77d64594228983ec20d61a224f3f491" }, { "url": "https://git.kernel.org/stable/c/b5a9da5d36162d34db0f36abb15420e295176793" }, { "url": "https://git.kernel.org/stable/c/7cb69e109610bba500e1ecb870f7988a4717208a" }, { "url": "https://git.kernel.org/stable/c/cc2192899d502e3321e60cf1e91421e7309d089c" }, { "url": "https://git.kernel.org/stable/c/bf310b044e85d4de670c94295c5d8e4c5bc5e7bc" }, { "url": "https://git.kernel.org/stable/c/ae02e603c0b39b29f3ce6fe3efe01b286af1a2a4" }, { "url": "https://git.kernel.org/stable/c/6d91479174240f39e9edea250d95fa08c678a207" }, { "url": "https://git.kernel.org/stable/c/654fe7505dc6889724d4094fa64f89991afabfc3" } ], "title": "apparmor: aa_label_alloc use aa_label_free on alloc failure", "x_generator": { "engine": "bippy-1.2.0" } } } }