Out-of-bounds read in Linux kernel - CVE-2026-64442
Published: July 27, 2026
Vulnerability identifier: #VU139506
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-64442
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in IE parsing loops in issue_assocreq() and join_cmd_hdl() when processing AP beacon and probe-response frames with a truncated final information element. A remote attacker can send a malicious AP beacon or probe-response frame with a truncated final information element to cause a denial of service.
The issue is triggered when the stored IE data ends with an element_id byte without a following length byte.
How to mitigate CVE-2026-64442
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/402f13ec95945f34a210b28df1f8740d3d4a58c5
- https://git.kernel.org/stable/c/4c21eec80cf502d9ea18e0b946246b2376452786
- https://git.kernel.org/stable/c/605ebd94d0f469204f3c9f2f84acc71e43e2780f
- https://git.kernel.org/stable/c/a830bdc82461353bf7b1f8a2ad2689bf5d2de444
- https://git.kernel.org/stable/c/ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e
- https://git.kernel.org/stable/c/bc881c9915c4468747d0ca5fd1abd7b313cfb0f4
- https://git.kernel.org/stable/c/c38d16b1ffac385c9e4b38447cd5c46af1114b58
- https://git.kernel.org/stable/c/ef61d628dfad38fead1fd2e08979ae9126d011d5