# ext4: free the sbi after a grace period

CVE record · `CVE-2026-99174`

- **Identifiers:** `CVE-2026-99174`
- **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: `6493792d3299b3e33f887ef8a150099d271faf9c to before cf3bd5824c985b350d150bcd76698ee5e993fcba` (git)
  - affected: `6493792d3299b3e33f887ef8a150099d271faf9c to before b4b0598fad51a978fcbda9d55eef6b5bd3cbe7d8` (git)
  - affected: `6493792d3299b3e33f887ef8a150099d271faf9c to before 4ce0e27ea610663a9cdc04e3bca38559147428d4` (git)
  - affected: `6493792d3299b3e33f887ef8a150099d271faf9c to before 80d5db1686b05fad6f384be017714297d828a714` (git)
  - affected: `6493792d3299b3e33f887ef8a150099d271faf9c to before 87d29b8b849738d52fe820d495fa0aa2d5a1ec82` (git)
  - affected: `6493792d3299b3e33f887ef8a150099d271faf9c to before c17b44266a1f9fcb49b894d4611d1254bf1aa313` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.19`
  - unaffected: `before 5.19` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0018, the 7th 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-2026-99174](https://www.cve.org/CVERecord?id=CVE-2026-99174)
- [NVD: CVE-2026-99174](https://nvd.nist.gov/vuln/detail/CVE-2026-99174)

### References from the CNA

- <https://git.kernel.org/stable/c/cf3bd5824c985b350d150bcd76698ee5e993fcba>
- <https://git.kernel.org/stable/c/b4b0598fad51a978fcbda9d55eef6b5bd3cbe7d8>
- <https://git.kernel.org/stable/c/4ce0e27ea610663a9cdc04e3bca38559147428d4>
- <https://git.kernel.org/stable/c/80d5db1686b05fad6f384be017714297d828a714>
- <https://git.kernel.org/stable/c/87d29b8b849738d52fe820d495fa0aa2d5a1ec82>
- <https://git.kernel.org/stable/c/c17b44266a1f9fcb49b894d4611d1254bf1aa313>

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-2026-99174>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99174/>. Everything for agents: <https://agentprime.io/llms.txt>.