Improper Check or Handling of Exceptional Conditions in Linux kernel - CVE-2026-46297

Vulnerability identifier: #VU134231

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-46297

CWE-ID: CWE-703

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 resource or shutdown handling in the VF misc interrupt registration logic in libwx when registering the VF misc interrupt handler. A local user can trigger the vulnerable interrupt registration path to cause a denial of service.

The issue results in a kernel WARNING when the interrupt is registered with IRQF_ONESHOT and no threaded handler.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-azure (Ubuntu package)
linux-aws (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 7.0.0-28.28, 7.0.0-28.28.1, 7.0.0-1003.4, 7.0.0-1008.8
linux-ibm (Ubuntu package) - addressed in versions 7.0.0-1008.8, 7.0.0-1010.10
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1009.9
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

• https://git.kernel.org/stable/c/1bca036fe3607182c21f05e2b262167edbef086c
• https://git.kernel.org/stable/c/7a33345153eeeda195c55f15be27074e4c3b5109
• https://git.kernel.org/stable/c/a841574c6e573132681aa57f9b43a0a897a423f6

• Improper Check or Handling of Exceptional Conditions in Linux kernel wangxun libwx driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux
• Ubuntu update for linux-ibm
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws