CVE-2026-92508RDMA/core: Fix potential use after free in ib_free_cq()
- 7.8HighCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 1 day later
· 1 day later
Published
- 32 days later
· 32 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 – < a804b162f9bc2b38b2ed1b4752eea9faadb1645b
- affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 – < 91f8a17a22ab615a03743120e19935e731f28fb9
- affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 – < 76f2cb4f721815c3b6262a6dc2151de88646924c
- affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 – < b8dcca427096fc9c50f1b376847fea72bc842d31
- affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 – < 9abea37942534eeb049335476178696b654b000c
- affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 – < 43403fe45379c64fa6276e5a8ede44493e5d2d3d
- affected 43d781b9fa562f0c6e50f62c870fbfeb9dc85213 – < 29dc2f8e1c97372c2871a70088707933515fbd5b
- affected 7ac277a01f9017fcde4f3f81670c995992945433
- affected 093f87dda065e0f618dd577985eccbe85efb9b54
- affected 5.8.17 – < 5.9
- affected 5.9.2 – < 5.10
- affected 5.10
- unaffected < 5.10
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References7
- https://git.kernel.org/stable/c/a804b162f9bc2b38b2ed1b4752eea9faadb1645b (opens in a new tab)
- https://git.kernel.org/stable/c/91f8a17a22ab615a03743120e19935e731f28fb9 (opens in a new tab)
- https://git.kernel.org/stable/c/76f2cb4f721815c3b6262a6dc2151de88646924c (opens in a new tab)
- https://git.kernel.org/stable/c/b8dcca427096fc9c50f1b376847fea72bc842d31 (opens in a new tab)
- https://git.kernel.org/stable/c/9abea37942534eeb049335476178696b654b000c (opens in a new tab)
- https://git.kernel.org/stable/c/43403fe45379c64fa6276e5a8ede44493e5d2d3d (opens in a new tab)
- https://git.kernel.org/stable/c/29dc2f8e1c97372c2871a70088707933515fbd5b (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-82129 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-92508)Record last updated .