SB20260816405 - Use-after-free in Linux kernel can
Published: August 16, 2026
Security Bulletin ID
SB20260816405
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-2026-72125)
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 a use-after-free race in the Linux kernel CAN ISO-TP socket handling in net/can/isotp.c when releasing a socket concurrently with NETDEV_UNREGISTER. A local user can trigger concurrent socket release and device unregistration to cause a denial of service.
The issue can leave a stale CAN filter referencing a freed socket.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0b811c4bbe3ec9ad611e90a540fe8b51b3bb8a96
- https://git.kernel.org/stable/c/20bab8b88baac140ca3701116e1d486c7f51e311
- https://git.kernel.org/stable/c/43884dc7963beef2328f507f4fe680bdc173eb80
- https://git.kernel.org/stable/c/7bef39ba76eb7307ed22a50329e0f5776dbeda58
- https://git.kernel.org/stable/c/e442b62ba5a7756c17e05a77b32cdd085a2b6138