SB20260918208 - Use-after-free in Linux kernel infiniband core driver
Published: September 18, 2026
Security Bulletin ID
SB20260918208
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-92509)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger a use-after-free condition.
The vulnerability exists due to use-after-free in counter_release() in the RDMA core counter handling when processing netlink access to a counter during its destruction. A local user can access a counter through the netlink path while it is being released to trigger a use-after-free condition.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/235ef2d0e750885c29340b0fc40620a7a4f52e12
- https://git.kernel.org/stable/c/2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b
- https://git.kernel.org/stable/c/5eb0c57a8b568eb08f464861d84d518a2af939ac
- https://git.kernel.org/stable/c/64c72390d8407ea86de712a477c796b07d37abc4
- https://git.kernel.org/stable/c/8c013e3a8d8273da4d47bf1c27f016a3551996f5
- https://git.kernel.org/stable/c/d5cc211e8c39e46f357d30a092d683e84d560de9