# RDMA/rxe: Fix OOB in free_rd_atomic_resources()

CVE record · `CVE-2026-80863`

- **Identifiers:** `CVE-2026-80863`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 4 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 4 Sept 2026, 15:55 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: `b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f to before 142c8165b7974b40fa62c393653edb5c00b8b5fe` (git)
  - affected: `b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f to before 30b90b55201902b2b8edcdbe2315ccd4c7547002` (git)
  - affected: `b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f to before 9b7d66ea88ae9395e42766b94a5c717b158b940a` (git)
  - affected: `b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f to before f5e6580a3a16a83c743ad5a7c16922854a0d8b71` (git)
  - affected: `b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f to before bc6e943794515d2a8417b02597a27bd377468d04` (git)
  - affected: `b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f to before bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e` (git)
  - affected: `b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f to before 4e5f753e8c280278c09f68fe728abf846e2bdfc1` (git)
  - affected: `b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f to before d219e7a8eed3802970c3e4d243d79c70ef0a31bf` (git)
  - affected: `b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f to before de329533792a373186d79dca1ca120f8fa0afd05` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.9`
  - unaffected: `before 4.9` (semver)
  - unaffected: `5.10.269 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.220 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.187 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.156 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.108 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.49 to 6.18.*, inclusive` (semver)
  - unaffected: `7.1.13 to 7.1.*, inclusive` (semver)
  - unaffected: `7.2.3 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

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0018, the 7th percentile, on 14 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 4 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-80863](https://www.cve.org/CVERecord?id=CVE-2026-80863)
- [NVD: CVE-2026-80863](https://nvd.nist.gov/vuln/detail/CVE-2026-80863)

### References from the CNA

- <https://git.kernel.org/stable/c/142c8165b7974b40fa62c393653edb5c00b8b5fe>
- <https://git.kernel.org/stable/c/30b90b55201902b2b8edcdbe2315ccd4c7547002>
- <https://git.kernel.org/stable/c/9b7d66ea88ae9395e42766b94a5c717b158b940a>
- <https://git.kernel.org/stable/c/f5e6580a3a16a83c743ad5a7c16922854a0d8b71>
- <https://git.kernel.org/stable/c/bc6e943794515d2a8417b02597a27bd377468d04>
- <https://git.kernel.org/stable/c/bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e>
- <https://git.kernel.org/stable/c/4e5f753e8c280278c09f68fe728abf846e2bdfc1>
- <https://git.kernel.org/stable/c/d219e7a8eed3802970c3e4d243d79c70ef0a31bf>
- <https://git.kernel.org/stable/c/de329533792a373186d79dca1ca120f8fa0afd05>

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-2026-80863>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80863/>. Everything for agents: <https://agentprime.io/llms.txt>.