{"id":"CVE-2026-90309","published":"2026-09-17T17:17:28.637","lastModified":"2026-09-18T18:17:52.977","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/erdma: Hold CQ references when processing EQ events\n\nEQ handlers look up CQs from dev->cq_xa and invoke CQ completion or\nerror callbacks outside the xarray lock. erdma_destroy_cq() can erase the\nCQ from the xarray and free its queue buffer and doorbell record while a\npreviously scheduled EQ handler is still using the CQ.\n\nAdd a CQ refcount and take a reference under the xarray lock with\nrefcount_inc_not_zero(). Remove the CQ from the xarray before dropping\nthe destroy-path reference, then wait for in-flight EQ users before\nreleasing CQ resources.","cvssScore":7.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/05b8ca493dd02319bca93c640b259c2ba51ef321","tags":[]},{"url":"https://git.kernel.org/stable/c/1fc9c1933959d2776a1ce7bf424251b8b5b586cd","tags":[]},{"url":"https://git.kernel.org/stable/c/4545f355654d044d35a31cd01cc46f491a8a7c36","tags":[]},{"url":"https://git.kernel.org/stable/c/610ef81797bb4f709e8675c1d8d093bb9ccdcbd8","tags":[]},{"url":"https://git.kernel.org/stable/c/98df2aee1459ee1c62c70cbe9b370d2a532aea36","tags":[]},{"url":"https://git.kernel.org/stable/c/c0a83f29a24c7e7f8516630848ef6db4c174deed","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}