SB2026052824 - Use-after-free in Linux kernel qrtr
Published: May 28, 2026
Security Bulletin ID
SB2026052824
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-2026-46047)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in the qrtr namespace remove callback when handling packets during driver removal. A local user can trigger packet delivery during driver removal to cause a denial of service.
The issue occurs in a race window after the workqueue is destroyed and before the socket is released.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0f313eb6a8f6dffa491373cf3afab979fa1c02f4
- https://git.kernel.org/stable/c/2e127ceb1c415e246076d8e09e23e443a7a2038f
- https://git.kernel.org/stable/c/7809fea20c9404bfcfa6112ec08d1fe1d3520beb
- https://git.kernel.org/stable/c/db3c60ec772de30acae92d560dfcc5258e58dbe8
- https://git.kernel.org/stable/c/f96779e916576e81430ebb326baff6e433fef8ae