{"api_version":"1","generated_at":"2026-08-21T21:42:30+00:00","cve":"CVE-2026-72459","urls":{"html":"https://cve.report/CVE-2026-72459","api":"https://cve.report/api/cve/CVE-2026-72459.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72459","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72459"},"summary":{"title":"apparmor: aa_label_alloc use aa_label_free on alloc failure","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:19","updated_at":"2026-08-17 06:19:13"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/6d91479174240f39e9edea250d95fa08c678a207","name":"https://git.kernel.org/stable/c/6d91479174240f39e9edea250d95fa08c678a207","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cc2192899d502e3321e60cf1e91421e7309d089c","name":"https://git.kernel.org/stable/c/cc2192899d502e3321e60cf1e91421e7309d089c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/654fe7505dc6889724d4094fa64f89991afabfc3","name":"https://git.kernel.org/stable/c/654fe7505dc6889724d4094fa64f89991afabfc3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7cb69e109610bba500e1ecb870f7988a4717208a","name":"https://git.kernel.org/stable/c/7cb69e109610bba500e1ecb870f7988a4717208a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ae02e603c0b39b29f3ce6fe3efe01b286af1a2a4","name":"https://git.kernel.org/stable/c/ae02e603c0b39b29f3ce6fe3efe01b286af1a2a4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b14fbacad77d64594228983ec20d61a224f3f491","name":"https://git.kernel.org/stable/c/b14fbacad77d64594228983ec20d61a224f3f491","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bf310b044e85d4de670c94295c5d8e4c5bc5e7bc","name":"https://git.kernel.org/stable/c/bf310b044e85d4de670c94295c5d8e4c5bc5e7bc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b5a9da5d36162d34db0f36abb15420e295176793","name":"https://git.kernel.org/stable/c/b5a9da5d36162d34db0f36abb15420e295176793","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72459","name":"CVE 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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":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"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."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:44:25.217Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72459","datePublished":"2026-08-15T05:57:04.794Z","dateReserved":"2026-08-09T03:40:39.932Z","dateUpdated":"2026-08-17T05:44:25.217Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:19","lastModifiedDate":"2026-08-17 06:19:13","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72459","Ordinal":"1","Title":"apparmor: aa_label_alloc use aa_label_free on alloc failure","CVE":"CVE-2026-72459","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72459","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"apparmor: aa_label_alloc use aa_label_free on alloc failure"}]}}}