{"cve":"CVE-2026-46254","nvd":{"published":"2026-06-03T18:16:26.323","modified":"2026-10-21T13:19:05.790","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/23f112bd6144e815153462e12d313ac3e7027168","https://git.kernel.org/stable/c/64802f731214a51dfe3c6c27636b3ddafd003eb0","https://git.kernel.org/stable/c/bd00629b527888a08a5222640fea045c6f64f5b5","https://git.kernel.org/stable/c/cded636008bde2b397a7cf63b8299d7c303aaf6a","https://git.kernel.org/stable/c/ec737e7fdf2f0ba7b203d4ec72cc915978b10e7e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-46254","score":0.00155,"percentile":0.04631,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}