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CVE-2026-90309

RDMA/erdma: Hold CQ references when processing EQ events PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 155055771704f8cbb5c176a4309b7dc30a50450c before 610ef81797bb4f709e8675c1d8d093bb9ccdcbd8; affected 155055771704f8cbb5c176a4309b7dc30a50450c before c0a83f29a24c7e7f8516630848ef6db4c174deed; affected 155055771704f8cbb5c176a4309b7dc30a50450c before 05b8ca493dd02319bca93c640b259c2ba51ef321; affected 155055771704f8cbb5c176a4309b7dc30a50450c before 1fc9c1933959d2776a1ce7bf424251b8b5b586cd; affected 155055771704f8cbb5c176a4309b7dc30a50450c before 4545f355654d044d35a31cd01cc46f491a8a7c36; affected 155055771704f8cbb5c176a4309b7dc30a50450c before 98df2aee1459ee1c62c70cbe9b370d2a532aea36
Linux / Linuxaffected 6.0; unaffected 0 before 6.0; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through *

CWE

No CWE identifiers supplied.

References