# KVM: x86: hyper-v: Clamp stimer deadline to avoid livelock

CVE record · `CVE-2026-89927`

- **Identifiers:** `CVE-2026-89927`
- **State:** Confirmed
- **Severity:** CVSS 7.1 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:32 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: `1f4b34f825e8cef6f493d06b46605384785b3d16 to before a4665762388750e08df99baabe5fce2a21d1423e` (git)
  - affected: `1f4b34f825e8cef6f493d06b46605384785b3d16 to before 61954727ee08f026f5e1c9ee69e1b404a68f2f7a` (git)
  - affected: `1f4b34f825e8cef6f493d06b46605384785b3d16 to before 8aa467fe757d8cb2278e98d7fbf44fc05eb0dbf8` (git)
  - affected: `1f4b34f825e8cef6f493d06b46605384785b3d16 to before 8e19ded84336891646b31375720717635f0fdd90` (git)
  - affected: `1f4b34f825e8cef6f493d06b46605384785b3d16 to before 6a8ba9213cce613455b1502ee0fd178656bf617b` (git)
  - affected: `1f4b34f825e8cef6f493d06b46605384785b3d16 to before 3097582b73a8ed1cd6f6790fa78706f4a79b5a49` (git)
  - affected: `1f4b34f825e8cef6f493d06b46605384785b3d16 to before bdb732ebee545b7e3bee7060efc754a8d99818b9` (git)
  - affected: `1f4b34f825e8cef6f493d06b46605384785b3d16 to before 0ca49fbd2883cd53d32d85b50feef17fa04d0fbf` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.5`
  - unaffected: `before 4.5` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (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: `6.18.51 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.5 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0018, the 7th 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89927](https://www.cve.org/CVERecord?id=CVE-2026-89927)
- [NVD: CVE-2026-89927](https://nvd.nist.gov/vuln/detail/CVE-2026-89927)

### References from the CNA

- <https://git.kernel.org/stable/c/a4665762388750e08df99baabe5fce2a21d1423e>
- <https://git.kernel.org/stable/c/61954727ee08f026f5e1c9ee69e1b404a68f2f7a>
- <https://git.kernel.org/stable/c/8aa467fe757d8cb2278e98d7fbf44fc05eb0dbf8>
- <https://git.kernel.org/stable/c/8e19ded84336891646b31375720717635f0fdd90>
- <https://git.kernel.org/stable/c/6a8ba9213cce613455b1502ee0fd178656bf617b>
- <https://git.kernel.org/stable/c/3097582b73a8ed1cd6f6790fa78706f4a79b5a49>
- <https://git.kernel.org/stable/c/bdb732ebee545b7e3bee7060efc754a8d99818b9>
- <https://git.kernel.org/stable/c/0ca49fbd2883cd53d32d85b50feef17fa04d0fbf>

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-2026-89927>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89927/>. Everything for agents: <https://agentprime.io/llms.txt>.