SB2026072747 - Out-of-bounds read in Linux kernel mac80211

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-64515)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 7.1 [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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1f573e17bcb7275ddd1c8f47f46ae0faf0e902a4
• https://git.kernel.org/stable/c/55c479aae99b120489a432db9c717484e523dfd6
• https://git.kernel.org/stable/c/722b3f86df80644463d29fe5451e30a617f74500
• https://git.kernel.org/stable/c/a74e893f30db64cdce0fc7a96d3baa417bcd55f5