{"id":"CVE-2026-23403","state":"PUBLISHED","title":"apparmor: fix memory leak in verify_header","description":"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.","publishedAt":"2026-04-01T08:36:34.269Z","updatedAt":"2026-05-11T22:06:14.098Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"9d678eb0fe55c9195d9a253e8c5b82a87b930737","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"6b79abcb3c985e153fcf9d395e1d4336081aabc2","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"663ce34786e759ebcbeb3060685c20bcc886d51a","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"786e2c2a87d9c505f33321d1fd23a176aa8ddeb1","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"4f0889f2df1ab99224a5e1ac4e20437eea5fe38e","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"42fd831abfc15d0643c14688f0522556b347e7e6","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"e38c55d9f834e5b848bfed0f5c586aaf45acb825","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/apparmor/policy_unpack.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.12","versionType":"semver"},{"version":"5.10.253","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.169","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.130","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.77","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.18","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.8","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/apparmor/policy_unpack.c"]}],"references":["https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737","https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2","https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557","https://git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51a","https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1","https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38e","https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6","https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23403.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23403","state":"PUBLISHED","datePublished":"2026-04-01T08:36:34.269Z","dateUpdated":"2026-05-11T22:06:14.098Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:46.012Z"},"containers":{"cna":{"title":"apparmor: fix memory leak in verify_header","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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"9d678eb0fe55c9195d9a253e8c5b82a87b930737","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"6b79abcb3c985e153fcf9d395e1d4336081aabc2","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"663ce34786e759ebcbeb3060685c20bcc886d51a","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"786e2c2a87d9c505f33321d1fd23a176aa8ddeb1","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"4f0889f2df1ab99224a5e1ac4e20437eea5fe38e","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"42fd831abfc15d0643c14688f0522556b347e7e6","versionType":"git"},{"version":"dd51c84857630e77c139afe4d9bba65fc051dc3f","status":"affected","lessThan":"e38c55d9f834e5b848bfed0f5c586aaf45acb825","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/apparmor/policy_unpack.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.12","versionType":"semver"},{"version":"5.10.253","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.169","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.130","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.77","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.18","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.8","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/apparmor/policy_unpack.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:06:14.098Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}