Linux: Out-of-bounds Read
CVE-2026-23305 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 7fc4b49474c836cee7d9801abf05e0198fcbfa74, eeaf28c8f4defe371a008a5ddefaf18abf534f81, 34f4495a7f72895776b81969639f527c99eb12b9 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 7fc4b49474c836cee7d9801abf05e0198fcbfa74 or eeaf28c8f4defe371a008a5ddefaf18abf534f81 or 34f4495a7f72895776b81969639f527c99eb12b9, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.18.17 or 6.19.7, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 0810d5ad88a18f1e6d549853a388ad0316f74e36 up to, but not including, 7fc4b49474c836cee7d9801abf05e0198fcbfa74; 0810d5ad88a18f1e6d549853a388ad0316f74e36 up to, but not including, eeaf28c8f4defe371a008a5ddefaf18abf534f81; 0810d5ad88a18f1e6d549853a388ad0316f74e36 up to, but not including, 34f4495a7f72895776b81969639f527c99eb12b9; 6.18 | 7fc4b49474c836cee7d9801abf05e0198fcbfa74, eeaf28c8f4defe371a008a5ddefaf18abf534f81, 34f4495a7f72895776b81969639f527c99eb12b9 |
| Linux | Linux Kernel | 6.18 up to, but not including, 6.18.17; 6.19 up to, but not including, 6.19.7 | 6.18.17, 6.19.7 |
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: accel/rocket: fix unwinding in error path in rocket_probe When rocket_core_init() fails (as could be the case with EPROBE_DEFER), we need to properly unwind by decrementing the counter we just incremented and if this is the first core we failed to probe, remove the rocket DRM device with rocket_device_fini() as well. This matches the logic in rocket_remove(). Failing to properly unwind results in out-of-bounds accesses.
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.
- 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
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
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