# RDMA/core: Fix potential use after free in ib_free_cq()

CVE record · `CVE-2026-92508`

- **Identifiers:** `CVE-2026-92508`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:10 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `43d781b9fa562f0c6e50f62c870fbfeb9dc85213 to before a804b162f9bc2b38b2ed1b4752eea9faadb1645b` (git)
  - affected: `43d781b9fa562f0c6e50f62c870fbfeb9dc85213 to before 91f8a17a22ab615a03743120e19935e731f28fb9` (git)
  - affected: `43d781b9fa562f0c6e50f62c870fbfeb9dc85213 to before 76f2cb4f721815c3b6262a6dc2151de88646924c` (git)
  - affected: `43d781b9fa562f0c6e50f62c870fbfeb9dc85213 to before b8dcca427096fc9c50f1b376847fea72bc842d31` (git)
  - affected: `43d781b9fa562f0c6e50f62c870fbfeb9dc85213 to before 9abea37942534eeb049335476178696b654b000c` (git)
  - affected: `43d781b9fa562f0c6e50f62c870fbfeb9dc85213 to before 43403fe45379c64fa6276e5a8ede44493e5d2d3d` (git)
  - affected: `43d781b9fa562f0c6e50f62c870fbfeb9dc85213 to before 29dc2f8e1c97372c2871a70088707933515fbd5b` (git)
  - affected: `7ac277a01f9017fcde4f3f81670c995992945433` (git)
  - affected: `093f87dda065e0f618dd577985eccbe85efb9b54` (git)
  - affected: `5.8.17 to before 5.9` (semver)
  - affected: `5.9.2 to before 5.10` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.10`
  - unaffected: `before 5.10` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0016, the 5th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-92508](https://www.cve.org/CVERecord?id=CVE-2026-92508)
- [NVD: CVE-2026-92508](https://nvd.nist.gov/vuln/detail/CVE-2026-92508)

### References from the CNA

- <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>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-92508>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-92508/>. Everything for agents: <https://agentprime.io/llms.txt>.