{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-52443", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-52443", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2024-02-22T16:13:31.154Z", "updatedAt": "2026-05-11T19:27:25.961Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "apparmor: avoid crash when parsed profile name is empty", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: avoid crash when parsed profile name is empty\n\nWhen processing a packed profile in unpack_profile() described like\n\n \"profile :ns::samba-dcerpcd /usr/lib*/samba/{,samba/}samba-dcerpcd {...}\"\n\na string \":samba-dcerpcd\" is unpacked as a fully-qualified name and then\npassed to aa_splitn_fqname().\n\naa_splitn_fqname() treats \":samba-dcerpcd\" as only containing a namespace.\nThus it returns NULL for tmpname, meanwhile tmpns is non-NULL. Later\naa_alloc_profile() crashes as the new profile name is NULL now.\n\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 6 PID: 1657 Comm: apparmor_parser Not tainted 6.7.0-rc2-dirty #16\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014\nRIP: 0010:strlen+0x1e/0xa0\nCall Trace:\n \n ? strlen+0x1e/0xa0\n aa_policy_init+0x1bb/0x230\n aa_alloc_profile+0xb1/0x480\n unpack_profile+0x3bc/0x4960\n aa_unpack+0x309/0x15e0\n aa_replace_profiles+0x213/0x33c0\n policy_update+0x261/0x370\n profile_replace+0x20e/0x2a0\n vfs_write+0x2af/0xe00\n ksys_write+0x126/0x250\n do_syscall_64+0x46/0xf0\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n \n---[ end trace 0000000000000000 ]---\nRIP: 0010:strlen+0x1e/0xa0\n\nIt seems such behaviour of aa_splitn_fqname() is expected and checked in\nother places where it is called (e.g. aa_remove_profiles). Well, there\nis an explicit comment \"a ns name without a following profile is allowed\"\ninside.\n\nAFAICS, nothing can prevent unpacked \"name\" to be in form like\n\":samba-dcerpcd\" - it is passed from userspace.\n\nDeny the whole profile set replacement in such case and inform user with\nEPROTO and an explaining message.\n\nFound by Linux Verification Center (linuxtesting.org).", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "04dc715e24d0820bf8740e1a1135ed61fe162bc8", "status": "affected", "versionType": "git", "lessThan": "9286ee97aa4803d99185768735011d0d65827c9e" }, { "version": "04dc715e24d0820bf8740e1a1135ed61fe162bc8", "status": "affected", "versionType": "git", "lessThan": "1d8e62b5569cc1466ceb8a7e4872cf10160a9dcf" }, { "version": "04dc715e24d0820bf8740e1a1135ed61fe162bc8", "status": "affected", "versionType": "git", "lessThan": "5ff00408e5029d3550ee77f62dc15f1e15c47f87" }, { "version": "04dc715e24d0820bf8740e1a1135ed61fe162bc8", "status": "affected", "versionType": "git", "lessThan": "0a12db736edbb4933e4274932aeea594b5876fa4" }, { "version": "04dc715e24d0820bf8740e1a1135ed61fe162bc8", "status": "affected", "versionType": "git", "lessThan": "9d4fa5fe2b1d56662afd14915a73b4d0783ffa45" }, { "version": "04dc715e24d0820bf8740e1a1135ed61fe162bc8", "status": "affected", "versionType": "git", "lessThan": "5c0392fdafb0a2321311900be83ffa572bef8203" }, { "version": "04dc715e24d0820bf8740e1a1135ed61fe162bc8", "status": "affected", "versionType": "git", "lessThan": "77ab09b92f16c8439a948d1af489196953dc4a0e" }, { "version": "04dc715e24d0820bf8740e1a1135ed61fe162bc8", "status": "affected", "versionType": "git", "lessThan": "55a8210c9e7d21ff2644809699765796d4bfb200" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.11", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.11" }, { "version": "4.19.306", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.268", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.209", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.148", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.75", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.14", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.7.2", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.7.*" }, { "version": "6.8", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }