Linux: Out-of-bounds Read
CVE-2026-23363 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 3356464e50e1ee15ba3c324ef6cc5a475c2e96e4, 2831a8c574545101e6d0df50785fccb16474eb3c, 22a6419a8b955df81082285543be3e61816c49b5 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 3356464e50e1ee15ba3c324ef6cc5a475c2e96e4 or 2831a8c574545101e6d0df50785fccb16474eb3c or 22a6419a8b955df81082285543be3e61816c49b5 or c41a9abd6ae31d130e8f332e7c8800c4c866234b, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.12.77 or 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 | c948b5da6bbec742b433138e3e3f9537a85af2e5 up to, but not including, 3356464e50e1ee15ba3c324ef6cc5a475c2e96e4; c948b5da6bbec742b433138e3e3f9537a85af2e5 up to, but not including, 2831a8c574545101e6d0df50785fccb16474eb3c; c948b5da6bbec742b433138e3e3f9537a85af2e5 up to, but not including, 22a6419a8b955df81082285543be3e61816c49b5; c948b5da6bbec742b433138e3e3f9537a85af2e5 up to, but not including, c41a9abd6ae31d130e8f332e7c8800c4c866234b; 6.7 | 3356464e50e1ee15ba3c324ef6cc5a475c2e96e4, 2831a8c574545101e6d0df50785fccb16474eb3c, 22a6419a8b955df81082285543be3e61816c49b5, c41a9abd6ae31d130e8f332e7c8800c4c866234b |
| Linux | Linux Kernel | 6.7.1 up to, but not including, 6.12.77; 6.13 up to, but not including, 6.18.17; 6.19 up to, but not including, 6.19.7; 6.7; 7.0 | 6.12.77, 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: wifi: mt76: mt7925: Fix possible oob access in mt7925_mac_write_txwi_80211() Check frame length before accessing the mgmt fields in mt7925_mac_write_txwi_80211 in order to avoid a possible oob 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
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
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