# Drivers: hv: Don't reset VMBus connection state on error/exit paths

CVE record · `CVE-2026-99216`

- **Identifiers:** `CVE-2026-99216`
- **State:** Confirmed
- **Severity:** CVSS 8.4 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 28 Oct 2026
- **Updated:** 31 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 Oct 2026, 10:36 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: `74347a99e73ae00b8385f1209aaea193c670f901 to before 2939215d57bc8e4189290544fca78f3809ac3ef8` (git)
  - affected: `74347a99e73ae00b8385f1209aaea193c670f901 to before a0ae955ba9a5067a157ebb8defb4a0a9cb1fc304` (git)
  - affected: `74347a99e73ae00b8385f1209aaea193c670f901 to before deef3ab5129ae4c45662c957cdab3739eb047fb1` (git)
  - affected: `74347a99e73ae00b8385f1209aaea193c670f901 to before 2e5ffbf1e41abbf6e02ce28115107938f55ff646` (git)
  - affected: `74347a99e73ae00b8385f1209aaea193c670f901 to before 2732210132f92aca0622b5134027990a809279d5` (git)
  - affected: `74347a99e73ae00b8385f1209aaea193c670f901 to before f47ce27af80b87cc684d5c12b65506af498ac7e5` (git)
  - affected: `74347a99e73ae00b8385f1209aaea193c670f901 to before 3195546a377c2d8d176d837e8baad5ce15d11195` (git)
  - affected: `74347a99e73ae00b8385f1209aaea193c670f901 to before ec31dc39e835ccde0930daccece8c492d28282fc` (git)
  - affected: `5e059fc0f054309036d3f612bc8b0a502ca58545` (git)
  - affected: `9f38f7b46de0747c1909e8c557aa21715dce20c5` (git)
  - affected: `caeeb3787167c884b955404a7e669fd77f267e44` (git)
  - affected: `4.19.118 to before 4.20` (semver)
  - and 2 more
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.7`
  - unaffected: `before 5.7` (semver)
  - unaffected: `5.10.273 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.224 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.161 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.115 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.59 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.13 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0014, the 3rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 28 Oct 2026, 10:36 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-99216)

## Sources

- [CVE List: CVE-2026-99216](https://www.cve.org/CVERecord?id=CVE-2026-99216)
- [NVD: CVE-2026-99216](https://nvd.nist.gov/vuln/detail/CVE-2026-99216)

### References from the CNA

- <https://git.kernel.org/stable/c/2939215d57bc8e4189290544fca78f3809ac3ef8>
- <https://git.kernel.org/stable/c/a0ae955ba9a5067a157ebb8defb4a0a9cb1fc304>
- <https://git.kernel.org/stable/c/deef3ab5129ae4c45662c957cdab3739eb047fb1>
- <https://git.kernel.org/stable/c/2e5ffbf1e41abbf6e02ce28115107938f55ff646>
- <https://git.kernel.org/stable/c/2732210132f92aca0622b5134027990a809279d5>
- <https://git.kernel.org/stable/c/f47ce27af80b87cc684d5c12b65506af498ac7e5>
- <https://git.kernel.org/stable/c/3195546a377c2d8d176d837e8baad5ce15d11195>
- <https://git.kernel.org/stable/c/ec31dc39e835ccde0930daccece8c492d28282fc>

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-2026-99216>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99216/>. Everything for agents: <https://agentprime.io/llms.txt>.