SB20260815250 - Use-after-free in Linux kernel dma driver
Published: August 15, 2026
Security Bulletin ID
SB20260815250
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) Use-after-free (CVE-ID: CVE-2026-72476)
CWE-ID: CWE-416 - Use After 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 use-after-free in dma_release_channel() when releasing a dma channel. A local user can trigger the release of a channel whose device reference may already be freed to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0bc191050c3253da8ef4bfaf157c44efed6e22cd
- https://git.kernel.org/stable/c/329ec20a86091d2a6e5b4fe507545e7d678a22a2
- https://git.kernel.org/stable/c/3b0240483dc977dbec4f3bc7a5383d4691ecb625
- https://git.kernel.org/stable/c/444f96066937f3fdf0e79b53289cff223c7d638b
- https://git.kernel.org/stable/c/5876f38b67a309c00628942cb25679749b53b397
- https://git.kernel.org/stable/c/92f853f0645aebf1d05d333e97ab7c342ace1892
- https://git.kernel.org/stable/c/9bdc8dce4068dadbdf7cf5ad6d4983e2afffedce
- https://git.kernel.org/stable/c/ab438a9efb9042c79d2f8db28a326d55feb8591f