Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 before a804b162f9bc2b38b2ed1b4752eea9faadb1645b; affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 before 91f8a17a22ab615a03743120e19935e731f28fb9; affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 before 76f2cb4f721815c3b6262a6dc2151de88646924c; affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 before b8dcca427096fc9c50f1b376847fea72bc842d31; affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 before 9abea37942534eeb049335476178696b654b000c; affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 before 43403fe45379c64fa6276e5a8ede44493e5d2d3d; affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 before 29dc2f8e1c97372c2871a70088707933515fbd5b; affected 7ac277a01f9017fcde4f3f81670c995992945433; affected 093f87dda065e0f618dd577985eccbe85efb9b54; affected 5.8.17 before 5.9; affected 5.9.2 before 5.10 |
| Linux / Linux | affected 5.10; unaffected 0 before 5.10; unaffected 5.15.221 through 5.15.*; 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
- https://git.kernel.org/stable/c/a804b162f9bc2b38b2ed1b4752eea9faadb1645b
- https://git.kernel.org/stable/c/91f8a17a22ab615a03743120e19935e731f28fb9
- https://git.kernel.org/stable/c/76f2cb4f721815c3b6262a6dc2151de88646924c
- https://git.kernel.org/stable/c/b8dcca427096fc9c50f1b376847fea72bc842d31
- https://git.kernel.org/stable/c/9abea37942534eeb049335476178696b654b000c
- https://git.kernel.org/stable/c/43403fe45379c64fa6276e5a8ede44493e5d2d3d
- https://git.kernel.org/stable/c/29dc2f8e1c97372c2871a70088707933515fbd5b