{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23403","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:37:46.012Z","datePublished":"2026-04-01T08:36:34.269Z","dateUpdated":"2026-05-11T22:06:14.098Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:06:14.098Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix memory leak in verify_header\n\nThe function sets `*ns = NULL` on every call, leaking the namespace\nstring allocated in previous iterations when multiple profiles are\nunpacked. This also breaks namespace consistency checking since *ns\nis always NULL when the comparison is made.\n\nRemove the incorrect assignment.\nThe caller (aa_unpack) initializes *ns to NULL once before the loop,\nwhich is sufficient."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/apparmor/policy_unpack.c"],"versions":[{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","lessThan":"9d678eb0fe55c9195d9a253e8c5b82a87b930737","status":"affected","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","lessThan":"6b79abcb3c985e153fcf9d395e1d4336081aabc2","status":"affected","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","lessThan":"bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557","status":"affected","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","lessThan":"663ce34786e759ebcbeb3060685c20bcc886d51a","status":"affected","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","lessThan":"786e2c2a87d9c505f33321d1fd23a176aa8ddeb1","status":"affected","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","lessThan":"4f0889f2df1ab99224a5e1ac4e20437eea5fe38e","status":"affected","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","lessThan":"42fd831abfc15d0643c14688f0522556b347e7e6","status":"affected","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","lessThan":"e38c55d9f834e5b848bfed0f5c586aaf45acb825","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_unpack.c"],"versions":[{"version":"3.12","status":"affected"},{"version":"0","lessThan":"3.12","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":"3.12","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.1.169"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.6.130"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.12.77"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.18.18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.19.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737"},{"url":"https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2"},{"url":"https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557"},{"url":"https://git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51a"},{"url":"https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1"},{"url":"https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38e"},{"url":"https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6"},{"url":"https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825"}],"title":"apparmor: fix memory leak in verify_header","x_generator":{"engine":"bippy-1.2.0"}}}}