Out-of-bounds read in Linux kernel - CVE-2026-64515
Published: July 27, 2026
Vulnerability identifier: #VU139424
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/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-2026-64515
CWE-ID: CWE-125
Exploitation vector: Adjecent network
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 an out-of-bounds read in the mac80211 MLE defragmentation routine when parsing fragmented reconf or EPCS multi-link elements in a non-transmitted profile. A remote attacker can send a specially crafted wireless management frame to cause a denial of service.
The heap overrun is limited by the buffer layout and parsing stops once the defragmentation buffer is filled.
How to mitigate CVE-2026-64515
Install security update from vendor's repository.