Linux: Out-of-bounds Read
CVE-2025-37846 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions eec737e17e5567e08148550a7f1d94d495b9fb17, 43267d934eacff6c70e15545d804ebbcab8a0bf5, 5f6022a74147675124b781fdc056b291850e7786 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.29% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Linux to eec737e17e5567e08148550a7f1d94d495b9fb17 or 43267d934eacff6c70e15545d804ebbcab8a0bf5 or 5f6022a74147675124b781fdc056b291850e7786 or a13bfa4fe0d6949cea14718df2d1fe84c38cd113, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.12.24 or 6.13.12 or 6.14.3, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 2de451a329cf662beeba71f63c7f83ee24ca6642 up to, but not including, eec737e17e5567e08148550a7f1d94d495b9fb17; 2de451a329cf662beeba71f63c7f83ee24ca6642 up to, but not including, 43267d934eacff6c70e15545d804ebbcab8a0bf5; 2de451a329cf662beeba71f63c7f83ee24ca6642 up to, but not including, 5f6022a74147675124b781fdc056b291850e7786; 2de451a329cf662beeba71f63c7f83ee24ca6642 up to, but not including, a13bfa4fe0d6949cea14718df2d1fe84c38cd113; 6.7 | eec737e17e5567e08148550a7f1d94d495b9fb17, 43267d934eacff6c70e15545d804ebbcab8a0bf5, 5f6022a74147675124b781fdc056b291850e7786, a13bfa4fe0d6949cea14718df2d1fe84c38cd113 |
| Linux | Linux Kernel | 6.7 up to, but not including, 6.12.24; 6.13 up to, but not including, 6.13.12; 6.14 up to, but not including, 6.14.3 | 6.12.24, 6.13.12, 6.14.3 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.
Official 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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 8.4 High severity
- 7.1 High severity
- 7.5 High severity
- 7.8 High severity
- 7.1 High severity
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