CVE-2026-92508

CVE CVE-2026-92508EUVD EUVD-2026-82129Published 2026-09-17T16:10:19.000ZLast changed 2026-09-18T17:55:32.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Fix potential use after free in ib_free_cq() When accessing a CQ via the netlink path the only synchronization mechanism for the said CQ is rdma_restrack_get(). Currently, rdma_restrack_del() is invoked at the end of ib_free_cq(), which is too late, since by that point vendor-specific resources associated with the CQ might already be freed. This can leave a short window where the CQ remains accessible through restrack, leading to a potential use-after-free. Fix this by moving the rdma_restrack_del() call to be before the freeing of the vendor-specific resources ensuring that the CQ is removed from restrack before its internal resources are released. This guarantees that no new users hold references to a CQ that is in the process of destruction.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 093f87dda065e0f618dd577985eccbe85efb9b54; patch: 7.3-rc1; 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 <b8dcca427096fc9c50f1b376847fea72bc842d31; 7ac277a01f9017fcde4f3f81670c995992945433; 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 <a804b162f9bc2b38b2ed1b4752eea9faadb1645b; 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 <91f8a17a22ab615a03743120e19935e731f28fb9; patch: 5.15.221; 5.9.2 <5.10; patch: 6.12.110; 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 <43403fe45379c64fa6276e5a8ede44493e5d2d3d; patch: 6.6.157; 5.8.17 <5.9; patch: 7.2.6; 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 <76f2cb4f721815c3b6262a6dc2151de88646924c; patch: 6.1.188; 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 <9abea37942534eeb049335476178696b654b000c; 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 <29dc2f8e1c97372c2871a70088707933515fbd5b; patch: 6.18.52; patch: 0; 5.10

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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