Linux: Out-of-bounds Read
CVE-2026-64444 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. The record lists versions 3ae0577d3be9f1e2707cce4749da250054e25e3f, 889ca6000ac7fa73457b041848fcb08e0d51b809, 1a52a05471494546f955a58e8c170c0c796c52d5 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 0.29% 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 3ae0577d3be9f1e2707cce4749da250054e25e3f or 889ca6000ac7fa73457b041848fcb08e0d51b809 or 1a52a05471494546f955a58e8c170c0c796c52d5 or 0406d746574e875d8778552eb674fcfbf5330bfb, whichever matches your release line, or a later version.
- Update Linux Kernel to 5.15.212 or 6.1.178 or 6.6.145 or 6.12.96, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 554c0a3abf216c991c5ebddcdb2c08689ecd290b up to, but not including, 3ae0577d3be9f1e2707cce4749da250054e25e3f; 554c0a3abf216c991c5ebddcdb2c08689ecd290b up to, but not including, 889ca6000ac7fa73457b041848fcb08e0d51b809; 554c0a3abf216c991c5ebddcdb2c08689ecd290b up to, but not including, 1a52a05471494546f955a58e8c170c0c796c52d5; 554c0a3abf216c991c5ebddcdb2c08689ecd290b up to, but not including, 0406d746574e875d8778552eb674fcfbf5330bfb; 554c0a3abf216c991c5ebddcdb2c08689ecd290b up to, but not including, 0970dd47726a57e52013594e9fbf667586eb3673; 554c0a3abf216c991c5ebddcdb2c08689ecd290b up to, but not including, 04f612dc03427e0b1ac80a2611b5ac0ba93ac446; 554c0a3abf216c991c5ebddcdb2c08689ecd290b up to, but not including, 7e7741c8315e4160aead00a60cdd6f81ab880717; 554c0a3abf216c991c5ebddcdb2c08689ecd290b up to, but not including, f9654207e92283e0acac5d64fe5f8835383b5a23; and 1 more ranges | 3ae0577d3be9f1e2707cce4749da250054e25e3f, 889ca6000ac7fa73457b041848fcb08e0d51b809, 1a52a05471494546f955a58e8c170c0c796c52d5, 0406d746574e875d8778552eb674fcfbf5330bfb, 0970dd47726a57e52013594e9fbf667586eb3673, 04f612dc03427e0b1ac80a2611b5ac0ba93ac446 |
| Linux | Linux Kernel | 4.12 up to, but not including, 5.15.212; 5.16 up to, but not including, 6.1.178; 6.2 up to, but not including, 6.6.145; 6.7 up to, but not including, 6.12.96; 6.13 up to, but not including, 6.18.39; 6.19 up to, but not including, 7.1.4; 7.2 | 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4 |
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
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- 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:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H. Scored by CNA.
Official description
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in OnAssocRsp() IE loop The IE parsing loop in OnAssocRsp() advances by (pIE->length + 2) each iteration but only guards on i < pkt_len. When a malicious AP sends an AssocResponse whose last IE has only one byte remaining in the frame (the element_id byte lands at pkt_len-1), the loop reads pIE->length from pframe[pkt_len], which is one byte past the allocated receive buffer. Additionally, even when the header bytes are in bounds, pIE->length itself can extend the data window beyond pkt_len, silently passing a truncated IE to the handler functions. Add two guards at the top of the loop body: 1. Break if fewer than sizeof(*pIE) bytes remain (can't read header). 2. Break if the IE's declared data extends past pkt_len.
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
- git.kernel.org/stable/c/0406d746574e875d8778552eb674fcfbf5330bfb
- git.kernel.org/stable/c/04f612dc03427e0b1ac80a2611b5ac0ba93ac446
- git.kernel.org/stable/c/0970dd47726a57e52013594e9fbf667586eb3673
- git.kernel.org/stable/c/1a52a05471494546f955a58e8c170c0c796c52d5
- git.kernel.org/stable/c/7e7741c8315e4160aead00a60cdd6f81ab880717
- git.kernel.org/stable/c/889ca6000ac7fa73457b041848fcb08e0d51b809
- git.kernel.org/stable/c/f9654207e92283e0acac5d64fe5f8835383b5a23
Other references
Recent Out-of-bounds Read vulnerabilities
- 8.4 High severity
- 7.1 High severity
- 7.1 High severity
- 7.7 High severity
- 9.1 Critical severity
- 8.2 High severity
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