{"api_version":"1","generated_at":"2026-04-19T01:11:33+00:00","cve":"CVE-2026-23404","urls":{"html":"https://cve.report/CVE-2026-23404","api":"https://cve.report/api/cve/CVE-2026-23404.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23404","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23404"},"summary":{"title":"apparmor: replace recursive profile removal with iterative approach","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-01 09:16:15","updated_at":"2026-04-18 09:16:24"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/a6a941a1294ac5abe22053dc501d25aed96e48fe","name":"https://git.kernel.org/stable/c/a6a941a1294ac5abe22053dc501d25aed96e48fe","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7eade846e013cbe8d2dc4a484463aa19e6515c7f","name":"https://git.kernel.org/stable/c/7eade846e013cbe8d2dc4a484463aa19e6515c7f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4fdc847b107321dec22bf8ecd6019b7af76d7886","name":"https://git.kernel.org/stable/c/4fdc847b107321dec22bf8ecd6019b7af76d7886","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ab09264660f9de5d05d1ef4e225aa447c63a8747","name":"https://git.kernel.org/stable/c/ab09264660f9de5d05d1ef4e225aa447c63a8747","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ea854f032190cc9f26dc4a0e727090c89e55e342","name":"https://git.kernel.org/stable/c/ea854f032190cc9f26dc4a0e727090c89e55e342","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/33959a491e9fd557abfa5fce5ae4637d400915d3","name":"https://git.kernel.org/stable/c/33959a491e9fd557abfa5fce5ae4637d400915d3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/999bd704b0b641527a5ed46f0d969deff8cfa68b","name":"https://git.kernel.org/stable/c/999bd704b0b641527a5ed46f0d969deff8cfa68b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b36a04284d0208be94e5e401409caa00e2bf1be1","name":"https://git.kernel.org/stable/c/b36a04284d0208be94e5e401409caa00e2bf1be1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23404","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23404","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c88d4c7b049e87998ac0a9f455aa545cc895ef92 ea854f032190cc9f26dc4a0e727090c89e55e342 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c88d4c7b049e87998ac0a9f455aa545cc895ef92 4fdc847b107321dec22bf8ecd6019b7af76d7886 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c88d4c7b049e87998ac0a9f455aa545cc895ef92 b36a04284d0208be94e5e401409caa00e2bf1be1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c88d4c7b049e87998ac0a9f455aa545cc895ef92 33959a491e9fd557abfa5fce5ae4637d400915d3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.169 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.130 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.77 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.18 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.8 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"23404","cve":"CVE-2026-23404","epss":"0.000320000","percentile":"0.090980000","score_date":"2026-04-18","updated_at":"2026-04-19 00:10:43"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["security/apparmor/policy.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ea854f032190cc9f26dc4a0e727090c89e55e342","status":"affected","version":"c88d4c7b049e87998ac0a9f455aa545cc895ef92","versionType":"git"},{"lessThan":"4fdc847b107321dec22bf8ecd6019b7af76d7886","status":"affected","version":"c88d4c7b049e87998ac0a9f455aa545cc895ef92","versionType":"git"},{"lessThan":"b36a04284d0208be94e5e401409caa00e2bf1be1","status":"affected","version":"c88d4c7b049e87998ac0a9f455aa545cc895ef92","versionType":"git"},{"lessThan":"33959a491e9fd557abfa5fce5ae4637d400915d3","status":"affected","version":"c88d4c7b049e87998ac0a9f455aa545cc895ef92","versionType":"git"},{"lessThan":"999bd704b0b641527a5ed46f0d969deff8cfa68b","status":"affected","version":"c88d4c7b049e87998ac0a9f455aa545cc895ef92","versionType":"git"},{"lessThan":"7eade846e013cbe8d2dc4a484463aa19e6515c7f","status":"affected","version":"c88d4c7b049e87998ac0a9f455aa545cc895ef92","versionType":"git"},{"lessThan":"a6a941a1294ac5abe22053dc501d25aed96e48fe","status":"affected","version":"c88d4c7b049e87998ac0a9f455aa545cc895ef92","versionType":"git"},{"lessThan":"ab09264660f9de5d05d1ef4e225aa447c63a8747","status":"affected","version":"c88d4c7b049e87998ac0a9f455aa545cc895ef92","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["security/apparmor/policy.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.36"},{"lessThan":"2.6.36","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.169","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.77","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.18","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.253","versionStartIncluding":"2.6.36","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"2.6.36","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.169","versionStartIncluding":"2.6.36","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.130","versionStartIncluding":"2.6.36","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.77","versionStartIncluding":"2.6.36","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.18","versionStartIncluding":"2.6.36","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.8","versionStartIncluding":"2.6.36","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"2.6.36","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-04-18T08:58:37.883Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23404","datePublished":"2026-04-01T08:36:35.032Z","dateReserved":"2026-01-13T15:37:46.012Z","dateUpdated":"2026-04-18T08:58:37.883Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-01 09:16:15","lastModifiedDate":"2026-04-18 09:16:24","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23404","Ordinal":"1","Title":"apparmor: replace recursive profile removal with iterative appro","CVE":"CVE-2026-23404","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23404","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"apparmor: replace recursive profile removal with iterative appro"}]}}}