{"id":"CVE-2026-46254","state":"PUBLISHED","title":"AppArmor: Allow apparmor to handle unaligned dfa tables","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nAppArmor: Allow apparmor to handle unaligned dfa tables\n\nThe dfa tables can originate from kernel or userspace and 8-byte alignment\nisn't always guaranteed and as such may trigger unaligned memory accesses\non various architectures. Resulting in the following\n\n[   73.901376] WARNING: CPU: 0 PID: 341 at security/apparmor/match.c:316 aa_dfa_unpack+0x6cc/0x720\n[   74.015867] Modules linked in: binfmt_misc evdev flash sg drm drm_panel_orientation_quirks backlight i2c_core configfs nfnetlink autofs4 ext4 crc16 mbcache jbd2 hid_generic usbhid sr_mod hid cdrom\nsd_mod ata_generic ohci_pci ehci_pci ehci_hcd ohci_hcd pata_ali libata sym53c8xx scsi_transport_spi tg3 scsi_mod usbcore libphy scsi_common mdio_bus usb_common\n[   74.428977] CPU: 0 UID: 0 PID: 341 Comm: apparmor_parser Not tainted 6.18.0-rc6+ #9 NONE\n[   74.536543] Call Trace:\n[   74.568561] [<0000000000434c24>] dump_stack+0x8/0x18\n[   74.633757] [<0000000000476438>] __warn+0xd8/0x100\n[   74.696664] [<00000000004296d4>] warn_slowpath_fmt+0x34/0x74\n[   74.771006] [<00000000008db28c>] aa_dfa_unpack+0x6cc/0x720\n[   74.843062] [<00000000008e643c>] unpack_pdb+0xbc/0x7e0\n[   74.910545] [<00000000008e7740>] unpack_profile+0xbe0/0x1300\n[   74.984888] [<00000000008e82e0>] aa_unpack+0xe0/0x6a0\n[   75.051226] [<00000000008e3ec4>] aa_replace_profiles+0x64/0x1160\n[   75.130144] [<00000000008d4d90>] policy_update+0xf0/0x280\n[   75.201057] [<00000000008d4fc8>] profile_replace+0xa8/0x100\n[   75.274258] [<0000000000766bd0>] vfs_write+0x90/0x420\n[   75.340594] [<00000000007670cc>] ksys_write+0x4c/0xe0\n[   75.406932] [<0000000000767174>] sys_write+0x14/0x40\n[   75.472126] [<0000000000406174>] linux_sparc_syscall+0x34/0x44\n[   75.548802] ---[ end trace 0000000000000000 ]---\n[   75.609503] dfa blob stream 0xfff0000008926b96 not aligned.\n[   75.682695] Kernel unaligned access at TPC[8db2a8] aa_dfa_unpack+0x6e8/0x720\n\nWork around it by using the get_unaligned_xx() helpers.","publishedAt":"2026-06-03T15:49:50.994Z","updatedAt":"2026-10-30T12:26:13.086Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e6e8bf418850d7958311a96ccfb594f2bcc8313e","status":"affected","lessThan":"60d175ecba4d067bd3379617eb09a905de476fcc","versionType":"git"},{"version":"e6e8bf418850d7958311a96ccfb594f2bcc8313e","status":"affected","lessThan":"bd00629b527888a08a5222640fea045c6f64f5b5","versionType":"git"},{"version":"e6e8bf418850d7958311a96ccfb594f2bcc8313e","status":"affected","lessThan":"ec737e7fdf2f0ba7b203d4ec72cc915978b10e7e","versionType":"git"},{"version":"e6e8bf418850d7958311a96ccfb594f2bcc8313e","status":"affected","lessThan":"23f112bd6144e815153462e12d313ac3e7027168","versionType":"git"},{"version":"e6e8bf418850d7958311a96ccfb594f2bcc8313e","status":"affected","lessThan":"cded636008bde2b397a7cf63b8299d7c303aaf6a","versionType":"git"},{"version":"e6e8bf418850d7958311a96ccfb594f2bcc8313e","status":"affected","lessThan":"64802f731214a51dfe3c6c27636b3ddafd003eb0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/apparmor/match.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.11","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","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/match.c"]}],"references":["https://git.kernel.org/stable/c/60d175ecba4d067bd3379617eb09a905de476fcc","https://git.kernel.org/stable/c/bd00629b527888a08a5222640fea045c6f64f5b5","https://git.kernel.org/stable/c/ec737e7fdf2f0ba7b203d4ec72cc915978b10e7e","https://git.kernel.org/stable/c/23f112bd6144e815153462e12d313ac3e7027168","https://git.kernel.org/stable/c/cded636008bde2b397a7cf63b8299d7c303aaf6a","https://git.kernel.org/stable/c/64802f731214a51dfe3c6c27636b3ddafd003eb0"],"weaknesses":[],"ingestedAt":"2026-10-30T12:44:04.813Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46254.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46254","state":"PUBLISHED","datePublished":"2026-06-03T15:49:50.994Z","dateUpdated":"2026-10-30T12:26:13.086Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.107Z"},"containers":{"cna":{"title":"AppArmor: Allow apparmor to handle unaligned dfa tables","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nAppArmor: Allow apparmor to handle unaligned dfa tables\n\nThe dfa tables can originate from kernel or userspace and 8-byte alignment\nisn't always guaranteed and as such may trigger unaligned memory accesses\non various architectures. Resulting in the following\n\n[   73.901376] WARNING: CPU: 0 PID: 341 at security/apparmor/match.c:316 aa_dfa_unpack+0x6cc/0x720\n[   74.015867] Modules linked in: binfmt_misc evdev flash sg drm drm_panel_orientation_quirks backlight i2c_core configfs nfnetlink autofs4 ext4 crc16 mbcache jbd2 hid_generic usbhid sr_mod hid cdrom\nsd_mod ata_generic ohci_pci ehci_pci ehci_hcd ohci_hcd pata_ali libata sym53c8xx scsi_transport_spi tg3 scsi_mod usbcore libphy scsi_common mdio_bus usb_common\n[   74.428977] CPU: 0 UID: 0 PID: 341 Comm: apparmor_parser Not tainted 6.18.0-rc6+ #9 NONE\n[   74.536543] Call Trace:\n[   74.568561] [<0000000000434c24>] dump_stack+0x8/0x18\n[   74.633757] [<0000000000476438>] __warn+0xd8/0x100\n[   74.696664] [<00000000004296d4>] warn_slowpath_fmt+0x34/0x74\n[   74.771006] [<00000000008db28c>] aa_dfa_unpack+0x6cc/0x720\n[   74.843062] [<00000000008e643c>] unpack_pdb+0xbc/0x7e0\n[   74.910545] [<00000000008e7740>] unpack_profile+0xbe0/0x1300\n[   74.984888] [<00000000008e82e0>] aa_unpack+0xe0/0x6a0\n[   75.051226] [<00000000008e3ec4>] aa_replace_profiles+0x64/0x1160\n[   75.130144] [<00000000008d4d90>] policy_update+0xf0/0x280\n[   75.201057] [<00000000008d4fc8>] profile_replace+0xa8/0x100\n[   75.274258] [<0000000000766bd0>] vfs_write+0x90/0x420\n[   75.340594] [<00000000007670cc>] ksys_write+0x4c/0xe0\n[   75.406932] [<0000000000767174>] sys_write+0x14/0x40\n[   75.472126] [<0000000000406174>] linux_sparc_syscall+0x34/0x44\n[   75.548802] ---[ end trace 0000000000000000 ]---\n[   75.609503] dfa blob stream 0xfff0000008926b96 not aligned.\n[   75.682695] Kernel unaligned access at TPC[8db2a8] aa_dfa_unpack+0x6e8/0x720\n\nWork around it by using the get_unaligned_xx() helpers."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e6e8bf418850d7958311a96ccfb594f2bcc8313e","status":"affected","lessThan":"60d175ecba4d067bd3379617eb09a905de476fcc","versionType":"git"},{"version":"e6e8bf418850d7958311a96ccfb594f2bcc8313e","status":"affected","lessThan":"bd00629b527888a08a5222640fea045c6f64f5b5","versionType":"git"},{"version":"e6e8bf418850d7958311a96ccfb594f2bcc8313e","status":"affected","lessThan":"ec737e7fdf2f0ba7b203d4ec72cc915978b10e7e","versionType":"git"},{"version":"e6e8bf418850d7958311a96ccfb594f2bcc8313e","status":"affected","lessThan":"23f112bd6144e815153462e12d313ac3e7027168","versionType":"git"},{"version":"e6e8bf418850d7958311a96ccfb594f2bcc8313e","status":"affected","lessThan":"cded636008bde2b397a7cf63b8299d7c303aaf6a","versionType":"git"},{"version":"e6e8bf418850d7958311a96ccfb594f2bcc8313e","status":"affected","lessThan":"64802f731214a51dfe3c6c27636b3ddafd003eb0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/apparmor/match.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.11","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","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/match.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/60d175ecba4d067bd3379617eb09a905de476fcc"},{"url":"https://git.kernel.org/stable/c/bd00629b527888a08a5222640fea045c6f64f5b5"},{"url":"https://git.kernel.org/stable/c/ec737e7fdf2f0ba7b203d4ec72cc915978b10e7e"},{"url":"https://git.kernel.org/stable/c/23f112bd6144e815153462e12d313ac3e7027168"},{"url":"https://git.kernel.org/stable/c/cded636008bde2b397a7cf63b8299d7c303aaf6a"},{"url":"https://git.kernel.org/stable/c/64802f731214a51dfe3c6c27636b3ddafd003eb0"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:26:13.086Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}