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vuln-cve/data/2026/72xxx/CVE-2026-72459.json
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{
"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:*:*:*:*:*:*:*:*",
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},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.13",
"versionEndExcluding": "6.18.40"
},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.13",
"versionEndExcluding": "7.1.5"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.13",
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}
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],
"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"
}
}
}
}
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