SB2026072043 - Improper control of a resource through its lifetime in Linux kernel iwlwifi mld driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-64175)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local attacker to cause a denial of service.

The vulnerability exists due to improper state management in iwl_mld_tx_from_txq() when processing transmit queues during a firmware restart. A local attacker can trigger high-throughput network traffic while the firmware is restarting to cause a denial of service.

The issue can lead to excessive CPU consumption and memory pressure from rapid skb allocation churn and slab fragmentation after a firmware crash.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/13f1786395dbbf3df73337063c798f1266be6151
• https://git.kernel.org/stable/c/2becb38a3e217ef2b2f42fddd7db7a25905ec291
• https://git.kernel.org/stable/c/dc31c69476520bb4c2a208211a8d3c310a62c4d0