SB2026072105 - Double free in Linux kernel ath ath11k driver
Published: July 21, 2026
Security Bulletin ID
SB2026072105
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Double free (CVE-ID: CVE-2026-63822)
CWE-ID: CWE-415 - Double Free
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 user to cause a denial of service.
The vulnerability exists due to a double free in the ath11k dp tx_status buffer handling when unbinding a device after an initialization error related to firmware. A local user can trigger device initialization failure and subsequent unbinding to cause a denial of service.
The issue is reproducible in a VM when MSI addressing initialization fails.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/051f954b94479d72222c9fbc82a3eef4777bca01
- https://git.kernel.org/stable/c/0a946abb82f29abe9a15173b707a449cb039b43e
- https://git.kernel.org/stable/c/0aa097a370277deab5337030b9e2d395742f469c
- https://git.kernel.org/stable/c/318703b6f71d1a29ee0ac46c32a38f7734d4cfb2
- https://git.kernel.org/stable/c/40aa3c2b0cb8e34e0576fc94cc70e4e33db03c0a
- https://git.kernel.org/stable/c/7b2e62b9080bf4a5f4e70cfe47156df8d93a4f13
- https://git.kernel.org/stable/c/8b7a26b6681922a38cd5a7829ace61f8e54df9b7
- https://git.kernel.org/stable/c/e569a5cb401a267168621aa9a1e7f07fcc9612c3