CVE-2025-37846

Summary

In the Linux kernel, the following vulnerability has been resolved:

arm64: mops: Do not dereference src reg for a set operation

The source register is not used for SET* and reading it can result in a UBSAN out-of-bounds array access error, specifically when the MOPS exception is taken from a SET* sequence with XZR (reg 31) as the source. Architecturally this is the only case where a src/dst/size field in the ESR can be reported as 31.

Prior to 2de451a329cf662b the code in do_el0_mops() was benign as the use of pt_regs_read_reg() prevented the out-of-bounds access.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2de451a329cf662beeba71f63c7f83ee24ca6642 < eec737e17e5567e08148550a7f1d94d495b9fb17affected
LinuxLinux2de451a329cf662beeba71f63c7f83ee24ca6642 < 43267d934eacff6c70e15545d804ebbcab8a0bf5affected
LinuxLinux2de451a329cf662beeba71f63c7f83ee24ca6642 < 5f6022a74147675124b781fdc056b291850e7786affected
LinuxLinux2de451a329cf662beeba71f63c7f83ee24ca6642 < a13bfa4fe0d6949cea14718df2d1fe84c38cd113affected
LinuxLinux6.7affected
LinuxLinux0 < 6.7unaffected
LinuxLinux6.12.24 <= 6.12.*unaffected
LinuxLinux6.13.12 <= 6.13.*unaffected
LinuxLinux6.14.3 <= 6.14.*unaffected
LinuxLinux6.15 <= *unaffected

Weaknesses

References