CVE-2026-92508 Affecting linux-6.12 package, versions <6.12.111-1~deb12u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-LINUX612-20506387
- published5 Oct 2026
- disclosed17 Sept 2026
Introduced: 17 Sep 2026
NewCVE-2026-92508 (opens in a new tab)How to fix?
Upgrade Debian:12 linux-6.12 to version 6.12.111-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-92508
- https://git.kernel.org/stable/c/29dc2f8e1c97372c2871a70088707933515fbd5b
- https://git.kernel.org/stable/c/43403fe45379c64fa6276e5a8ede44493e5d2d3d
- https://git.kernel.org/stable/c/76f2cb4f721815c3b6262a6dc2151de88646924c
- https://git.kernel.org/stable/c/91f8a17a22ab615a03743120e19935e731f28fb9
- https://git.kernel.org/stable/c/9abea37942534eeb049335476178696b654b000c
- https://git.kernel.org/stable/c/a804b162f9bc2b38b2ed1b4752eea9faadb1645b
- https://git.kernel.org/stable/c/b8dcca427096fc9c50f1b376847fea72bc842d31