# vdpa_sim_blk: reject out-of-range sector starts

CVE record · `CVE-2026-97991`

- **Identifiers:** `CVE-2026-97991`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 25 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 25 Sept 2026, 10:23 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.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `7d189f617f83f780915b737896a696ff605bd19f to before 2ff2a8d063fdfa1e1479fb1fe2e3356a2ce89018` (git)
  - affected: `7d189f617f83f780915b737896a696ff605bd19f to before 36ef4d8527f71648f00347f6ba759f0b7e5e0977` (git)
  - affected: `7d189f617f83f780915b737896a696ff605bd19f to before 000c6300776ceaf6b715780113f4275b1be4195b` (git)
  - affected: `7d189f617f83f780915b737896a696ff605bd19f to before 14acb0d44b7d90a077beb7b92b444b90bafda9d9` (git)
  - affected: `7d189f617f83f780915b737896a696ff605bd19f to before a8a1413a2cfdbedc896249f461d6d92efbbfe21f` (git)
  - affected: `7d189f617f83f780915b737896a696ff605bd19f to before d6dac17e20fd2abd0eb8c09d69fccf7426e12bcf` (git)
  - affected: `7d189f617f83f780915b737896a696ff605bd19f to before 0a8693f00c408d85f086ad85d29e7030bf1e2055` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.13`
  - unaffected: `before 5.13` (semver)
  - unaffected: `5.15.222 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.189 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.111 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.53 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.7 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0012, the 1st percentile, on 12 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 25 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-97991](https://www.cve.org/CVERecord?id=CVE-2026-97991)
- [NVD: CVE-2026-97991](https://nvd.nist.gov/vuln/detail/CVE-2026-97991)

### References from the CNA

- <https://git.kernel.org/stable/c/2ff2a8d063fdfa1e1479fb1fe2e3356a2ce89018>
- <https://git.kernel.org/stable/c/36ef4d8527f71648f00347f6ba759f0b7e5e0977>
- <https://git.kernel.org/stable/c/000c6300776ceaf6b715780113f4275b1be4195b>
- <https://git.kernel.org/stable/c/14acb0d44b7d90a077beb7b92b444b90bafda9d9>
- <https://git.kernel.org/stable/c/a8a1413a2cfdbedc896249f461d6d92efbbfe21f>
- <https://git.kernel.org/stable/c/d6dac17e20fd2abd0eb8c09d69fccf7426e12bcf>
- <https://git.kernel.org/stable/c/0a8693f00c408d85f086ad85d29e7030bf1e2055>

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-2026-97991>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-97991/>. Everything for agents: <https://agentprime.io/llms.txt>.