# vsock/virtio: fix zerocopy completion for multi-skb sends

CVE record · `CVE-2026-53365`

- **Identifiers:** `CVE-2026-53365`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Weakness (CWE):** [CWE-404](https://cwe.mitre.org/data/definitions/404.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 13 Jul 2026
- **Updated:** 18 Aug 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 13 Jul 2026, 17:33 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: `581512a6dc939ef122e49336626ae159f3b8a345 to before 293fe8f2d1b5ac464ca16a8eba09571bbbb34ba9` (git)
  - affected: `581512a6dc939ef122e49336626ae159f3b8a345 to before 76b995bc57bd90cb6e954e1966fbd8786da47f0d` (git)
  - affected: `581512a6dc939ef122e49336626ae159f3b8a345 to before b3155f2b78db21e99256bcf7eb902f24ff6d5338` (git)
  - affected: `581512a6dc939ef122e49336626ae159f3b8a345 to before ae38d9179190a956e2a87a69ef1dd6f451b51c4d` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.7`
  - unaffected: `before 6.7` (semver)
  - unaffected: `6.12.97 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.34 to 6.18.*, inclusive` (semver)
  - unaffected: `7.0.11 to 7.0.*, inclusive` (semver)
  - unaffected: `7.1 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 ADP (CISA-ADP)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0020, the 9th percentile, on 15 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 13 Jul 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-53365](https://www.cve.org/CVERecord?id=CVE-2026-53365)
- [NVD: CVE-2026-53365](https://nvd.nist.gov/vuln/detail/CVE-2026-53365)

### References from the CNA

- <https://git.kernel.org/stable/c/293fe8f2d1b5ac464ca16a8eba09571bbbb34ba9>
- <https://git.kernel.org/stable/c/76b995bc57bd90cb6e954e1966fbd8786da47f0d>
- <https://git.kernel.org/stable/c/b3155f2b78db21e99256bcf7eb902f24ff6d5338>
- <https://git.kernel.org/stable/c/ae38d9179190a956e2a87a69ef1dd6f451b51c4d>

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-2026-53365>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-53365/>. Everything for agents: <https://agentprime.io/llms.txt>.