SB20260727299 - Improper resource shutdown or release in Linux kernel sunrpc xprtrdma

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-64281)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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 shutdown or release in svc_rdma_sq_wait() and the svcrdma transport close path when handling transport teardown and disconnect events. A remote attacker can trigger transport disconnect or error conditions to cause a denial of service.

The issue can leave threads stuck indefinitely in TASK_UNINTERRUPTIBLE state, pinning svc_xprt references and blocking transport cleanup.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/40eedc4253dbda0b29b7961200534dfcecb48ace
• https://git.kernel.org/stable/c/e5248a7426030db1e126363f72afdb3b71339a5c