CVE-2026-23404

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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": "ea854f032190cc9f26dc4a0e727090c89e55e342", "status": "affected", "versionType": "git"}, {"version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92", "lessThan": "4fdc847b107321dec22bf8ecd6019b7af76d7886", "status": "affected", "versionType": "git"}, {"version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92", "lessThan": "b36a04284d0208be94e5e401409caa00e2bf1be1", "status": "affected", "versionType": "git"}, {"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": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.169", "lessThanOrEqual": "6.1.*", "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", "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": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.1.169"}, {"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"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ea854f032190cc9f26dc4a0e727090c89e55e342"}, {"url": "https://git.kernel.org/stable/c/4fdc847b107321dec22bf8ecd6019b7af76d7886"}, {"url": "https://git.kernel.org/stable/c/b36a04284d0208be94e5e401409caa00e2bf1be1"}, {"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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/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": "2026-06-17T10:21:30.953", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-04-01T09:16:15.977", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/33959a491e9fd557abfa5fce5ae4637d400915d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4fdc847b107321dec22bf8ecd6019b7af76d7886"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7eade846e013cbe8d2dc4a484463aa19e6515c7f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/999bd704b0b641527a5ed46f0d969deff8cfa68b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a6a941a1294ac5abe22053dc501d25aed96e48fe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ab09264660f9de5d05d1ef4e225aa447c63a8747"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b36a04284d0208be94e5e401409caa00e2bf1be1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ea854f032190cc9f26dc4a0e727090c89e55e342"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: apparmor: replace recursive profile removal with iterative approach", "id": "2453799", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2453799"}, "csaw": false, "cwe": "CWE-770", "details": ["A flaw was found in the Linux kernel's AppArmor security module. A local user could trigger a denial of service by initiating a recursive profile removal operation with deeply nested profiles. This recursive process can lead to kernel stack exhaustion, causing the system to crash."], "name": "CVE-2026-23404", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23404\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23404\nhttps://lore.kernel.org/linux-cve-announce/2026040111-CVE-2026-23404-8b0b@gregkh/T"]}

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