Linux: Out-of-bounds Read
CVE-2026-64058 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.8 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 090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6, f17b9121bb99f88188ec9be2db5da1d561f4c01b, b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b 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 090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6 or f17b9121bb99f88188ec9be2db5da1d561f4c01b or b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b or ded0c6f1606061148c202825f7e53d711f9f84cf, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.18.34 or 7.0.11, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | ee4cdf7ba857a894ad1650d6ab77669cbbfa329e up to, but not including, 090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6; ee4cdf7ba857a894ad1650d6ab77669cbbfa329e up to, but not including, f17b9121bb99f88188ec9be2db5da1d561f4c01b; ee4cdf7ba857a894ad1650d6ab77669cbbfa329e up to, but not including, b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b; ee4cdf7ba857a894ad1650d6ab77669cbbfa329e up to, but not including, ded0c6f1606061148c202825f7e53d711f9f84cf; 6.12 | 090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6, f17b9121bb99f88188ec9be2db5da1d561f4c01b, b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b, ded0c6f1606061148c202825f7e53d711f9f84cf |
| Linux | Linux Kernel | 6.12 up to, but not including, 6.18.34; 6.19 up to, but not including, 7.0.11; 7.1 | 6.18.34, 7.0.11 |
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
- HighData or code can be modified at will.
- 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:H/A:H. Scored by CNA.
Official description
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfs_read_folio() to wait on writeback Fix netfs_read_folio() to wait for an ongoing writeback to complete so that it can trust the dirty flag and whatever is attached to folio->private (folio->private may get cleaned up by the collector before it clears the writeback flag).
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
Other references
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 7.8 High severity
- 7.3 High severity
- 7.1 High severity
- 7.8 High severity
- 9.8 Critical severity
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