# ntfs3: free the sbi after a grace period

CVE record · `CVE-2026-99171`

- **Identifiers:** `CVE-2026-99171`
- **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: `a3a956c78efaa202b1d75190136671cf6e87bfbe to before c39150784a801dbbfaf4fbfa284cb610552a5039` (git)
  - affected: `a3a956c78efaa202b1d75190136671cf6e87bfbe to before 36e6753daf9bb64563dcb5a3bb22f7699d973fa2` (git)
  - affected: `a3a956c78efaa202b1d75190136671cf6e87bfbe to before c8b1a4840467930e01f1a9374d991d7a8a2896c1` (git)
  - affected: `a3a956c78efaa202b1d75190136671cf6e87bfbe to before 7abecef26a9be8f9de70659a3092250461a52072` (git)
  - affected: `a3a956c78efaa202b1d75190136671cf6e87bfbe to before c01b091b06412d3b1b53d8c2925f6de586c8a2fc` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.2`
  - unaffected: `before 6.2` (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

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-2026-99171](https://www.cve.org/CVERecord?id=CVE-2026-99171)
- [NVD: CVE-2026-99171](https://nvd.nist.gov/vuln/detail/CVE-2026-99171)

### References from the CNA

- <https://git.kernel.org/stable/c/c39150784a801dbbfaf4fbfa284cb610552a5039>
- <https://git.kernel.org/stable/c/36e6753daf9bb64563dcb5a3bb22f7699d973fa2>
- <https://git.kernel.org/stable/c/c8b1a4840467930e01f1a9374d991d7a8a2896c1>
- <https://git.kernel.org/stable/c/7abecef26a9be8f9de70659a3092250461a52072>
- <https://git.kernel.org/stable/c/c01b091b06412d3b1b53d8c2925f6de586c8a2fc>

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-2026-99171>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99171/>. Everything for agents: <https://agentprime.io/llms.txt>.