Improper control of a resource through its lifetime in Linux kernel - CVE-2026-64175

Vulnerability identifier: #VU138456

CSH Severity: Low

CVSS v4: 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]

CVE-ID: CVE-2026-64175

CWE-ID: CWE-664

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
Ubuntu
linux-ibm (Ubuntu package)
linux-azure (Ubuntu package)
linux-aws (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-bos (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-ibm (Ubuntu package) - addressed in versions 7.0.0-1008.8, 7.0.0-1010.10
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1010.10
linux-aws (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1015.15
linux-nvidia (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1016.16~24.04.1
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2016.16

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

• Improper control of a resource through its lifetime in Linux kernel iwlwifi mld driver
• Ubuntu update for linux-ibm
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws
• Ubuntu update for linux-nvidia-bos
• Ubuntu update for linux-nvidia