{"id":"CVE-2026-90309","summary":"RDMA/erdma: Hold CQ references when processing EQ events","details":"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-\u003ecq_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.","modified":"2026-09-19T03:47:25.782141804Z","published":"2026-09-17T16:08:30.346Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90309.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/05b8ca493dd02319bca93c640b259c2ba51ef321"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1fc9c1933959d2776a1ce7bf424251b8b5b586cd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4545f355654d044d35a31cd01cc46f491a8a7c36"},{"type":"WEB","url":"https://git.kernel.org/stable/c/610ef81797bb4f709e8675c1d8d093bb9ccdcbd8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/98df2aee1459ee1c62c70cbe9b370d2a532aea36"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c0a83f29a24c7e7f8516630848ef6db4c174deed"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90309.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90309"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"155055771704f8cbb5c176a4309b7dc30a50450c"},{"fixed":"610ef81797bb4f709e8675c1d8d093bb9ccdcbd8"},{"fixed":"c0a83f29a24c7e7f8516630848ef6db4c174deed"},{"fixed":"05b8ca493dd02319bca93c640b259c2ba51ef321"},{"fixed":"1fc9c1933959d2776a1ce7bf424251b8b5b586cd"},{"fixed":"4545f355654d044d35a31cd01cc46f491a8a7c36"},{"fixed":"98df2aee1459ee1c62c70cbe9b370d2a532aea36"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90309.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90309.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}