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

CVE record · `CVE-2026-92511`

- **Identifiers:** `CVE-2026-92511`
- **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: `08f294a1524bc3211a28091daa6c7513828c7d33 to before 42f7a0c7a94003059540cce448acabfa62ad119d` (git)
  - affected: `08f294a1524bc3211a28091daa6c7513828c7d33 to before 253c2ed71a532c70fa0e64317ceb02bb1a50c84c` (git)
  - affected: `08f294a1524bc3211a28091daa6c7513828c7d33 to before b85a148731eceffacb6a030950187d785175607f` (git)
  - affected: `08f294a1524bc3211a28091daa6c7513828c7d33 to before 197c262dbf94c0f7ab7ac54b66f892ce9f343232` (git)
  - affected: `08f294a1524bc3211a28091daa6c7513828c7d33 to before 8a72a6aad84b3928dbb5e564bff1f56a7ec222ae` (git)
  - affected: `08f294a1524bc3211a28091daa6c7513828c7d33 to before 3481bec4dfc4aee24ffea5a547ee95b70b67d9d5` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.16`
  - unaffected: `before 4.16` (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:** 0.0013, the 2nd 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-2026-92511](https://www.cve.org/CVERecord?id=CVE-2026-92511)
- [NVD: CVE-2026-92511](https://nvd.nist.gov/vuln/detail/CVE-2026-92511)

### References from the CNA

- <https://git.kernel.org/stable/c/42f7a0c7a94003059540cce448acabfa62ad119d>
- <https://git.kernel.org/stable/c/253c2ed71a532c70fa0e64317ceb02bb1a50c84c>
- <https://git.kernel.org/stable/c/b85a148731eceffacb6a030950187d785175607f>
- <https://git.kernel.org/stable/c/197c262dbf94c0f7ab7ac54b66f892ce9f343232>
- <https://git.kernel.org/stable/c/8a72a6aad84b3928dbb5e564bff1f56a7ec222ae>
- <https://git.kernel.org/stable/c/3481bec4dfc4aee24ffea5a547ee95b70b67d9d5>

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-2026-92511>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-92511/>. Everything for agents: <https://agentprime.io/llms.txt>.