Linux: Out-of-bounds Read
CVE-2026-68265 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.3 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 d256dac008d1d9e6378aa1a5454e89a8292d174c, c4affa4e8bc8086b4d3e8d6cf1055a624f813d72, 7bc597ce74bab4153b2009c92eccf889e9d74044 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 0.13% 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 d256dac008d1d9e6378aa1a5454e89a8292d174c or c4affa4e8bc8086b4d3e8d6cf1055a624f813d72 or 7bc597ce74bab4153b2009c92eccf889e9d74044, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | c1bb69a2e8e2d55c3725e304d8b8fd189ee43fbe up to, but not including, d256dac008d1d9e6378aa1a5454e89a8292d174c; c1bb69a2e8e2d55c3725e304d8b8fd189ee43fbe up to, but not including, c4affa4e8bc8086b4d3e8d6cf1055a624f813d72; c1bb69a2e8e2d55c3725e304d8b8fd189ee43fbe up to, but not including, 7bc597ce74bab4153b2009c92eccf889e9d74044; 6.18 | d256dac008d1d9e6378aa1a5454e89a8292d174c, c4affa4e8bc8086b4d3e8d6cf1055a624f813d72, 7bc597ce74bab4153b2009c92eccf889e9d74044 |
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
- LowLimited modification of data is possible.
- 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:L/A:H. Scored by CNA.
Official description
In the Linux kernel, the following vulnerability has been resolved: drm/xe/vm: Fix BO prefetch with CONSULT_MEM_ADVISE_PREF_LOC When prefetch region is DRM_XE_CONSULT_MEM_ADVISE_PREF_LOC for a BO VMA, the code used it as an index into region_to_mem_type[], causing an out-of-bounds access since the value is -1. Resolve the preferred location for BO VMAs directly: local VRAM on dGFX (using the BO's tile placement) or system memory on iGPU. Discovered using AI-assisted static analysis confirmed by Intel Product Security. v2: -Fix null dereference (cherry picked from commit d9a4906ac03be9f6ed3f3b45c56c866b867fd75b)
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
Other references
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 9.8 Critical severity
- 8.1 High severity
- 8.3 High severity
- 7.1 High severity
- 9.1 Critical severity
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