CVE-2026-90309
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/erdma: Hold CQ references when processing EQ events EQ handlers look up CQs from dev->cq_xa and invoke CQ completion or error callbacks outside the xarray lock. erdma_destroy_cq() can erase the CQ from the xarray and free its queue buffer and doorbell record while a previously scheduled EQ handler is still using the CQ. Add a CQ refcount and take a reference under the xarray lock with refcount_inc_not_zero(). Remove the CQ from the xarray before dropping the destroy-path reference, then wait for in-flight EQ users before releasing CQ resources.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://git.kernel.org/stable/c/05b8ca493dd02319bca93c640b259c2ba51ef321
- https://git.kernel.org/stable/c/1fc9c1933959d2776a1ce7bf424251b8b5b586cd
- https://git.kernel.org/stable/c/4545f355654d044d35a31cd01cc46f491a8a7c36
- https://git.kernel.org/stable/c/610ef81797bb4f709e8675c1d8d093bb9ccdcbd8
- https://git.kernel.org/stable/c/98df2aee1459ee1c62c70cbe9b370d2a532aea36
- https://git.kernel.org/stable/c/c0a83f29a24c7e7f8516630848ef6db4c174deed
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.