CVE-2025-37846: Linux kernel · arm64: mops: Do not dereference src reg for a set operation
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 5 Nov 2026, 21:49 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 9 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
Description
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.
References
- git.kernel.org/stable/c/eec737e17e5567e08148550a7f1d94d495b9fb17 (opens in a new tab)
- git.kernel.org/stable/c/43267d934eacff6c70e15545d804ebbcab8a0bf5 (opens in a new tab)
- git.kernel.org/stable/c/5f6022a74147675124b781fdc056b291850e7786 (opens in a new tab)
- git.kernel.org/stable/c/a13bfa4fe0d6949cea14718df2d1fe84c38cd113 (opens in a new tab)