# net/mlx5e: Prevent stale XSK buffer release on MPWQE refill retry

CVE record · `CVE-2026-99078`

- **Identifiers:** `CVE-2026-99078`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 23 Oct 2026
- **Updated:** 24 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 23 Oct 2026, 12:23 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.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `4c2a1323680709078736a2886c754004e9fe42e6 to before f3a52e2ec2788a7f6b64137985c087188a54ad4f` (git)
  - affected: `4c2a1323680709078736a2886c754004e9fe42e6 to before d215d09606b0fcd18ad1eb532995782a21cea49d` (git)
  - affected: `4c2a1323680709078736a2886c754004e9fe42e6 to before 867119b4b588037724b85839d534465f0334d9bd` (git)
  - affected: `4c2a1323680709078736a2886c754004e9fe42e6 to before 3d73a1164a8c6b4461907a65cb6c022ea4fd39af` (git)
  - affected: `4c2a1323680709078736a2886c754004e9fe42e6 to before 63811edf512584c946e5e96b100e9e280703bbb5` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.4`
  - unaffected: `before 6.4` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.113 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.57 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.11 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0046, the 39th percentile, on 6 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 23 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-99078](https://www.cve.org/CVERecord?id=CVE-2026-99078)
- [NVD: CVE-2026-99078](https://nvd.nist.gov/vuln/detail/CVE-2026-99078)

### References from the CNA

- <https://git.kernel.org/stable/c/f3a52e2ec2788a7f6b64137985c087188a54ad4f>
- <https://git.kernel.org/stable/c/d215d09606b0fcd18ad1eb532995782a21cea49d>
- <https://git.kernel.org/stable/c/867119b4b588037724b85839d534465f0334d9bd>
- <https://git.kernel.org/stable/c/3d73a1164a8c6b4461907a65cb6c022ea4fd39af>
- <https://git.kernel.org/stable/c/63811edf512584c946e5e96b100e9e280703bbb5>

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-2026-99078>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99078/>. Everything for agents: <https://agentprime.io/llms.txt>.