CVE-2026-46254

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-46254
In the Linux kernel, the following vulnerability has been resolved: AppArmor: Allow apparmor to handle unaligned dfa tables The dfa tables can originate from kernel or userspace and 8-byte alignment isn't always guaranteed and as such may trigger unaligned memory accesses on various architectures. Resulting in the following [   73.901376] WARNING: CPU: 0 PID: 341 at security/apparmor/match.c:316 aa_dfa_unpack+0x6cc/0x720 [   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 sd_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 [   74.428977] CPU: 0 UID: 0 PID: 341 Comm: apparmor_parser Not tainted 6.18.0-rc6+ #9 NONE [   74.536543] Call Trace: [   74.568561] [<0000000000434c24>] dump_stack+0x8/0x18 [   74.633757] [<0000000000476438>] __warn+0xd8/0x100 [   74.696664] [<00000000004296d4>] warn_slowpath_fmt+0x34/0x74 [   74.771006] [<00000000008db28c>] aa_dfa_unpack+0x6cc/0x720 [   74.843062] [<00000000008e643c>] unpack_pdb+0xbc/0x7e0 [   74.910545] [<00000000008e7740>] unpack_profile+0xbe0/0x1300 [   74.984888] [<00000000008e82e0>] aa_unpack+0xe0/0x6a0 [   75.051226] [<00000000008e3ec4>] aa_replace_profiles+0x64/0x1160 [   75.130144] [<00000000008d4d90>] policy_update+0xf0/0x280 [   75.201057] [<00000000008d4fc8>] profile_replace+0xa8/0x100 [   75.274258] [<0000000000766bd0>] vfs_write+0x90/0x420 [   75.340594] [<00000000007670cc>] ksys_write+0x4c/0xe0 [   75.406932] [<0000000000767174>] sys_write+0x14/0x40 [   75.472126] [<0000000000406174>] linux_sparc_syscall+0x34/0x44 [   75.548802] ---[ end trace 0000000000000000 ]--- [   75.609503] dfa blob stream 0xfff0000008926b96 not aligned. [   75.682695] Kernel unaligned access at TPC[8db2a8] aa_dfa_unpack+0x6e8/0x720 Work around it by using the get_unaligned_xx() helpers.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/23f112bd6144e815153462e12d313ac3e7027168 Patch
https://git.kernel.org/stable/c/64802f731214a51dfe3c6c27636b3ddafd003eb0 Patch
https://git.kernel.org/stable/c/cded636008bde2b397a7cf63b8299d7c303aaf6a Patch
https://git.kernel.org/stable/c/ec737e7fdf2f0ba7b203d4ec72cc915978b10e7e Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

09 Jun 2026, 20:10

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/23f112bd6144e815153462e12d313ac3e7027168 - () https://git.kernel.org/stable/c/23f112bd6144e815153462e12d313ac3e7027168 - Patch
References () https://git.kernel.org/stable/c/64802f731214a51dfe3c6c27636b3ddafd003eb0 - () https://git.kernel.org/stable/c/64802f731214a51dfe3c6c27636b3ddafd003eb0 - Patch
References () https://git.kernel.org/stable/c/cded636008bde2b397a7cf63b8299d7c303aaf6a - () https://git.kernel.org/stable/c/cded636008bde2b397a7cf63b8299d7c303aaf6a - Patch
References () https://git.kernel.org/stable/c/ec737e7fdf2f0ba7b203d4ec72cc915978b10e7e - () https://git.kernel.org/stable/c/ec737e7fdf2f0ba7b203d4ec72cc915978b10e7e - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE NVD-CWE-noinfo
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux linux Kernel
Linux

03 Jun 2026, 18:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-06-03 18:16

Updated : 2026-06-09 20:10

NVD link : CVE-2026-46254

Mitre link : CVE-2026-46254

CVE.ORG link : CVE-2026-46254

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo