Linux: Out-of-bounds Read
CVE-2025-39922 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 682105ab63826fb7ca7c112b42b478d156fbb19f, 129c1cb8a081a02d99267cb51708f1326395f4e8, b7e5c3e3bfa9dc8af75ff6d8633ad7070e1985e4 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 0.15% 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 682105ab63826fb7ca7c112b42b478d156fbb19f or 129c1cb8a081a02d99267cb51708f1326395f4e8 or b7e5c3e3bfa9dc8af75ff6d8633ad7070e1985e4, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.12.46 or 6.16.6, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 9356b6db9d051e9d939dd0f9ae7a0514103ef228 up to, but not including, 682105ab63826fb7ca7c112b42b478d156fbb19f; 9356b6db9d051e9d939dd0f9ae7a0514103ef228 up to, but not including, 129c1cb8a081a02d99267cb51708f1326395f4e8; 9356b6db9d051e9d939dd0f9ae7a0514103ef228 up to, but not including, b7e5c3e3bfa9dc8af75ff6d8633ad7070e1985e4; 6.9 | 682105ab63826fb7ca7c112b42b478d156fbb19f, 129c1cb8a081a02d99267cb51708f1326395f4e8, b7e5c3e3bfa9dc8af75ff6d8633ad7070e1985e4 |
| Linux | Linux Kernel | 6.9 up to, but not including, 6.12.46; 6.13 up to, but not including, 6.16.6; 6.17 | 6.12.46, 6.16.6 |
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.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.1 | High | NVD |
| CVSS 3.1 | 7.1 | High | CISA (ADP) |
Official description
In the Linux kernel, the following vulnerability has been resolved: ixgbe: fix incorrect map used in eee linkmode incorrectly used ixgbe_lp_map in loops intended to populate the supported and advertised EEE linkmode bitmaps based on ixgbe_ls_map. This results in incorrect bit setting and potential out-of-bounds access, since ixgbe_lp_map and ixgbe_ls_map have different sizes and purposes. ixgbe_lp_map[i] -> ixgbe_ls_map[i] Use ixgbe_ls_map for supported and advertised linkmodes, and keep ixgbe_lp_map usage only for link partner (lp_advertised) mapping.
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
- 7.8 High severity
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