CVE-2026-23403

{"id": "CVE-2026-23403", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "dd51c84857630e77c139afe4d9bba65fc051dc3f", "lessThan": "9d678eb0fe55c9195d9a253e8c5b82a87b930737", "versionType": "git"}, {"status": "affected", "version": "dd51c84857630e77c139afe4d9bba65fc051dc3f", "lessThan": "6b79abcb3c985e153fcf9d395e1d4336081aabc2", "versionType": "git"}, {"status": "affected", "version": "dd51c84857630e77c139afe4d9bba65fc051dc3f", "lessThan": "bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557", "versionType": "git"}, {"status": "affected", "version": "dd51c84857630e77c139afe4d9bba65fc051dc3f", "lessThan": "663ce34786e759ebcbeb3060685c20bcc886d51a", "versionType": "git"}, {"status": "affected", "version": "dd51c84857630e77c139afe4d9bba65fc051dc3f", "lessThan": "786e2c2a87d9c505f33321d1fd23a176aa8ddeb1", "versionType": "git"}, {"status": "affected", "version": "dd51c84857630e77c139afe4d9bba65fc051dc3f", "lessThan": "4f0889f2df1ab99224a5e1ac4e20437eea5fe38e", "versionType": "git"}, {"status": "affected", "version": "dd51c84857630e77c139afe4d9bba65fc051dc3f", "lessThan": "42fd831abfc15d0643c14688f0522556b347e7e6", "versionType": "git"}, {"status": "affected", "version": "dd51c84857630e77c139afe4d9bba65fc051dc3f", "lessThan": "e38c55d9f834e5b848bfed0f5c586aaf45acb825", "versionType": "git"}], "programFiles": ["security/apparmor/policy_unpack.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.12"}, {"status": "unaffected", "version": "0", "lessThan": "3.12", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.253", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.203", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.169", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.130", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.77", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.18", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.8", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["security/apparmor/policy_unpack.c"], "defaultStatus": "affected"}]}], "published": "2026-04-01T09:16:15.803", "references": [{"url": "https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-401"}]}], "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."}], "lastModified": "2026-06-17T10:21:30.840", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0931301A-390F-4D6A-95A4-6D822A49CA04", "versionEndExcluding": "5.10.253", "versionStartIncluding": "3.12.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "20DDB3E9-AABF-4107-ADB0-5362AA067045", "versionEndExcluding": "5.15.203", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DBEC0E5D-641C-4E98-A6D9-5799B10CE451", "versionEndExcluding": "6.1.169", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C57BB918-DF28-46B3-94F7-144176841267", "versionEndExcluding": "6.6.130", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B3D12E00-E42D-4056-B354-BAD4903C03A5", "versionEndExcluding": "6.12.77", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "346AD1FB-0CE8-4D9D-8E56-5EB1A4D06199", "versionEndExcluding": "6.18.18", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C65A7D85-C7C6-485E-AC35-66A374C73FAC", "versionEndExcluding": "6.19.8", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:3.12:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5BAA3B29-CC59-41A5-AFBD-D7C24E65FC2F"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}