SB20260925154 - Improper update of reference count in Linux kernel sunrpc xprtrdma

Description

This security bulletin contains information about 1 vulnerability.

1) Improper update of reference count (CVE-ID: CVE-2026-93224)

CWE-ID: CWE-911 - Improper Update of Reference Count

CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper resource cleanup in the svc_rdma_accept() error-handling path and rpcrdma_rn_unregister() when handling a failed RDMA transport accept. A remote attacker can trigger failed RDMA transport accepts to cause a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0335800071a6dfdf7d21d729b5e7d8fa98936211
• https://git.kernel.org/stable/c/26190394c64c9429481fc88a4738f70bb92fb352
• https://git.kernel.org/stable/c/45a444a17240f4fa2235f0dfd4a96fc80f1eb2c2
• https://git.kernel.org/stable/c/5aabe070c00e5bdf4ab150fb5f72ad5f266d6241