SB20260918206 - Use-after-free in Linux kernel infiniband core driver
Published: September 18, 2026
Security Bulletin ID
SB20260918206
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-2026-92507)
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 potentially trigger a use-after-free.
The vulnerability exists due to use-after-free in ib_dealloc_pd_user() RDMA resource tracking when accessing a protection domain through the netlink path during its destruction. A local user can access a protection domain through the netlink path while it is being destroyed to potentially trigger a use-after-free.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/66d65f36d39759e9f62dc746dc71d862f20f827f
- https://git.kernel.org/stable/c/7647363fa02046da681acc3c827d9f301c06e0e7
- https://git.kernel.org/stable/c/8b90e701342275f414e36e7421c502237df241ad
- https://git.kernel.org/stable/c/c06f2856a1d7e75a5ff247fc05224aa2452e7265
- https://git.kernel.org/stable/c/d9c0daf9362aad2aeed1d9c5536d108772a8d31c
- https://git.kernel.org/stable/c/df0e9efe61ca706a07b1c9bf93fcb9032455efc4