What’s Vulnerable › Vulnerabilities

CVE-2022-50666: RDMA/siw: Fix QP destroy to wait for all references dropped.

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-09 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Fix QP destroy to wait for all references dropped. Delay QP destroy completion until all siw references to QP are dropped. The calling RDMA core will free QP structure after successful return from siw_qp_destroy() call, so siw must not hold any remaining reference to the QP upon return. A use-after-free was encountered in xfstest generic/460, while testing NFSoRDMA. Here, after a TCP connection drop by peer, the triggered siw_cm_work_handler got delayed until after QP destroy call, referencing a QP which has already freed.

Affected products

• Linux kernel: 5.3 — fixed in 6.1

How to fix

Upgrade to a fixed version: Linux kernel 6.1. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0ed8bf9d0bb19f3f5eedd73f04aaf5bba9ac0737
• https://git.kernel.org/stable/c/5c75d608fad58301b63e7d69200c13c3a1d411da
• https://git.kernel.org/stable/c/74ad141e995a730760b1bcfa14854b7f1057d6bc
• https://git.kernel.org/stable/c/a3c278807a459e6f50afee6971cabe74cccfb490

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