CVE-2025-37846: arm64: mops: Do not dereference src reg for a set operation
Vulnerability summary
CVE-2025-37846 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 21.4% of scored vulnerabilities.
Not severe (CVSS 7.1, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 20 · Related 20Timeline
- 09-05-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.29%
Chance of exploitation in the next 30 days
Percentile
21%
Versus all other CVEs
30-day change
Increase +0.01 pp
From 0.28% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu112 products
- linux< 6.8.0-100.100
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1046.49
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 2de451a329cf662beeba71f63c7f83ee24ca6642, < eec737e17e5567e08148550a7f1d94d495b9fb17 | ≥ 2de451a329cf662beeba71f63c7f83ee24ca6642, < 43267d934eacff6c70e15545d804ebbcab8a0bf5 | ≥ 2de451a329cf662beeba71f63c7f83ee24ca6642, < 5f6022a74147675124b781fdc056b291850e7786 | ≥ 2de451a329cf662beeba71f63c7f83ee24ca6642, < a13bfa4fe0d6949cea14718df2d1fe84c38cd113 | 6.7
- linux_kernel≥ 6.7, < 6.12.24 | ≥ 6.13, < 6.13.12 | ≥ 6.14, < 6.14.3
Debian1 product
- linux< 6.12.25-1
3 vendors · 115 products
