Improper control of a resource through its lifetime in Linux kernel - CVE-2026-64035

Vulnerability identifier: #VU138613

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-2026-64035

CWE-ID: CWE-664

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to improper state management in igc_fpe_init_smd_frame() when initializing SMD transmit frames. A local user can trigger transmission of an SMD skb to cause a denial of service.

The issue arises because a reused igc_tx_buffer entry may retain a stale XDP or XSK type, causing TX completion to use the wrong cleanup path.

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/1c8587bd025244aa52061f5ceecbf5e68a1063d9
• https://git.kernel.org/stable/c/1f83545f432d106d5fc71d3997b2d382104ebcc4
• https://git.kernel.org/stable/c/5acc641e590e008caaed480ed9ffae47cf7ecbdf

• Improper control of a resource through its lifetime in Linux kernel intel igc 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