{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23404", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:46.012Z", "datePublished": "2026-04-01T08:36:35.032Z", "dateUpdated": "2026-04-01T08:36:35.032Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-01T08:36:35.032Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: replace recursive profile removal with iterative approach\n\nThe profile removal code uses recursion when removing nested profiles,\nwhich can lead to kernel stack exhaustion and system crashes.\n\nReproducer:\n $ pf='a'; for ((i=0; i<1024; i++)); do\n echo -e \"profile $pf { \\n }\" | apparmor_parser -K -a;\n pf=\"$pf//x\";\n done\n $ echo -n a > /sys/kernel/security/apparmor/.remove\n\nReplace the recursive __aa_profile_list_release() approach with an\niterative approach in __remove_profile(). The function repeatedly\nfinds and removes leaf profiles until the entire subtree is removed,\nmaintaining the same removal semantic without recursion."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["security/apparmor/policy.c"], "versions": [{"version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92", "lessThan": "33959a491e9fd557abfa5fce5ae4637d400915d3", "status": "affected", "versionType": "git"}, {"version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92", "lessThan": "999bd704b0b641527a5ed46f0d969deff8cfa68b", "status": "affected", "versionType": "git"}, {"version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92", "lessThan": "7eade846e013cbe8d2dc4a484463aa19e6515c7f", "status": "affected", "versionType": "git"}, {"version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92", "lessThan": "a6a941a1294ac5abe22053dc501d25aed96e48fe", "status": "affected", "versionType": "git"}, {"version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92", "lessThan": "ab09264660f9de5d05d1ef4e225aa447c63a8747", "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/policy.c"], "versions": [{"version": "2.6.36", "status": "affected"}, {"version": "0", "lessThan": "2.6.36", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.77", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.18", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.8", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0-rc4", "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": "2.6.36", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.12.77"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.18.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.19.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "7.0-rc4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/33959a491e9fd557abfa5fce5ae4637d400915d3"}, {"url": "https://git.kernel.org/stable/c/999bd704b0b641527a5ed46f0d969deff8cfa68b"}, {"url": "https://git.kernel.org/stable/c/7eade846e013cbe8d2dc4a484463aa19e6515c7f"}, {"url": "https://git.kernel.org/stable/c/a6a941a1294ac5abe22053dc501d25aed96e48fe"}, {"url": "https://git.kernel.org/stable/c/ab09264660f9de5d05d1ef4e225aa447c63a8747"}], "title": "apparmor: replace recursive profile removal with iterative approach", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: replace recursive profile removal with iterative approach\n\nThe profile removal code uses recursion when removing nested profiles,\nwhich can lead to kernel stack exhaustion and system crashes.\n\nReproducer:\n $ pf='a'; for ((i=0; i<1024; i++)); do\n echo -e \"profile $pf { \\n }\" | apparmor_parser -K -a;\n pf=\"$pf//x\";\n done\n $ echo -n a > /sys/kernel/security/apparmor/.remove\n\nReplace the recursive __aa_profile_list_release() approach with an\niterative approach in __remove_profile(). The function repeatedly\nfinds and removes leaf profiles until the entire subtree is removed,\nmaintaining the same removal semantic without recursion."}], "id": "CVE-2026-23404", "lastModified": "2026-04-01T09:16:15.977", "metrics": {}, "published": "2026-04-01T09:16:15.977", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/33959a491e9fd557abfa5fce5ae4637d400915d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7eade846e013cbe8d2dc4a484463aa19e6515c7f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/999bd704b0b641527a5ed46f0d969deff8cfa68b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a6a941a1294ac5abe22053dc501d25aed96e48fe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ab09264660f9de5d05d1ef4e225aa447c63a8747"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

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