# ring-buffer: Fix false warning in ring_buffer_map_get_reader()

CVE record · `CVE-2026-99158`

- **Identifiers:** `CVE-2026-99158`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 28 Oct 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 Oct 2026, 10:35 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: `117c39200d9d760cbd5944bb89efb7b9c51965aa to before 32751946f9b3e502e3d6e42d98b343473112f887` (git)
  - affected: `117c39200d9d760cbd5944bb89efb7b9c51965aa to before 029770f5badedc0f0ff85fc45e24785cbbee4a67` (git)
  - affected: `117c39200d9d760cbd5944bb89efb7b9c51965aa to before 68e6ab180cfb6dfa79652f41ed7899a6d4cf5438` (git)
  - affected: `117c39200d9d760cbd5944bb89efb7b9c51965aa to before 89bab1dba8a0167ef0d819e0f55b6bafa038e87f` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.10`
  - unaffected: `before 6.10` (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

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0017, the 6th percentile, on 5 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 28 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-99158](https://www.cve.org/CVERecord?id=CVE-2026-99158)
- [NVD: CVE-2026-99158](https://nvd.nist.gov/vuln/detail/CVE-2026-99158)

### References from the CNA

- <https://git.kernel.org/stable/c/32751946f9b3e502e3d6e42d98b343473112f887>
- <https://git.kernel.org/stable/c/029770f5badedc0f0ff85fc45e24785cbbee4a67>
- <https://git.kernel.org/stable/c/68e6ab180cfb6dfa79652f41ed7899a6d4cf5438>
- <https://git.kernel.org/stable/c/89bab1dba8a0167ef0d819e0f55b6bafa038e87f>

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-2026-99158>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99158/>. Everything for agents: <https://agentprime.io/llms.txt>.