# KVM: s390: vsie: zero stale crypto bits

CVE record · `CVE-2026-80921`

- **Identifiers:** `CVE-2026-80921`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 9 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 9 Sept 2026, 16:19 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: `6b79de4b056e5a2febc0c61233d8f0ad7868e49c to before d110b3297f11ef227098b8a82ade2d5f123b7d2f` (git)
  - affected: `6b79de4b056e5a2febc0c61233d8f0ad7868e49c to before 59d51550b5cb916bda037673a721a404b3b47a0d` (git)
  - affected: `6b79de4b056e5a2febc0c61233d8f0ad7868e49c to before f6079dca67eccb5eabef9f72437948c66dc5131f` (git)
  - affected: `6b79de4b056e5a2febc0c61233d8f0ad7868e49c to before 087c19cc60a8caa1a08e1e434c8be2caf6c27733` (git)
  - affected: `6b79de4b056e5a2febc0c61233d8f0ad7868e49c to before 7d23489f51109e3ebba5b5db8c5f0185af7b7fdf` (git)
  - affected: `6b79de4b056e5a2febc0c61233d8f0ad7868e49c to before 935eeba276012916c76243e5cbb843efd8fdb75d` (git)
  - affected: `6b79de4b056e5a2febc0c61233d8f0ad7868e49c to before d4bcd2df6d0d2af916b4fe1a533958778ea7c45b` (git)
  - affected: `6b79de4b056e5a2febc0c61233d8f0ad7868e49c to before 29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6` (git)
  - affected: `6b79de4b056e5a2febc0c61233d8f0ad7868e49c to before 34d5b5b646c91cfb9338d7a12c955a70ffb8c66b` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.20`
  - unaffected: `before 4.20` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0013, the 2nd 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 9 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-80921](https://www.cve.org/CVERecord?id=CVE-2026-80921)
- [NVD: CVE-2026-80921](https://nvd.nist.gov/vuln/detail/CVE-2026-80921)

### References from the CNA

- <https://git.kernel.org/stable/c/d110b3297f11ef227098b8a82ade2d5f123b7d2f>
- <https://git.kernel.org/stable/c/59d51550b5cb916bda037673a721a404b3b47a0d>
- <https://git.kernel.org/stable/c/f6079dca67eccb5eabef9f72437948c66dc5131f>
- <https://git.kernel.org/stable/c/087c19cc60a8caa1a08e1e434c8be2caf6c27733>
- <https://git.kernel.org/stable/c/7d23489f51109e3ebba5b5db8c5f0185af7b7fdf>
- <https://git.kernel.org/stable/c/935eeba276012916c76243e5cbb843efd8fdb75d>
- <https://git.kernel.org/stable/c/d4bcd2df6d0d2af916b4fe1a533958778ea7c45b>
- <https://git.kernel.org/stable/c/29b4f7bc2991313bd3e6f6fb8fdf1b173f086dd6>
- <https://git.kernel.org/stable/c/34d5b5b646c91cfb9338d7a12c955a70ffb8c66b>

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-2026-80921>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80921/>. Everything for agents: <https://agentprime.io/llms.txt>.