# x86/mm: Fix user-space data loss with MADV_FREE and THP

CVE record · `CVE-2026-97945`

- **Identifiers:** `CVE-2026-97945`
- **State:** Confirmed
- **Severity:** No CVSS score
- **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, 10:22 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: `bb3aadf7d446aaf22c725b274e2c194ac5cb2111 to before b5dec6dfb593d81fec15ba43c4fe5d58f10a49a2` (git)
  - affected: `bb3aadf7d446aaf22c725b274e2c194ac5cb2111 to before e4d569fe2f436a9b58c048fefabf56eab68c1b7e` (git)
  - affected: `bb3aadf7d446aaf22c725b274e2c194ac5cb2111 to before 55ddbc2ca6d5db64d44c3fb8f8705b4d39eb30b7` (git)
  - affected: `bb3aadf7d446aaf22c725b274e2c194ac5cb2111 to before a5ad97cbcfcec31430268441c10eedde73200177` (git)
  - affected: `bb3aadf7d446aaf22c725b274e2c194ac5cb2111 to before f7491d7c81db0e7c304a7bd757a76d2fbeaff80e` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.6`
  - unaffected: `before 6.6` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0021, the 10th 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-2026-97945](https://www.cve.org/CVERecord?id=CVE-2026-97945)
- [NVD: CVE-2026-97945](https://nvd.nist.gov/vuln/detail/CVE-2026-97945)

### References from the CNA

- <https://git.kernel.org/stable/c/b5dec6dfb593d81fec15ba43c4fe5d58f10a49a2>
- <https://git.kernel.org/stable/c/e4d569fe2f436a9b58c048fefabf56eab68c1b7e>
- <https://git.kernel.org/stable/c/55ddbc2ca6d5db64d44c3fb8f8705b4d39eb30b7>
- <https://git.kernel.org/stable/c/a5ad97cbcfcec31430268441c10eedde73200177>
- <https://git.kernel.org/stable/c/f7491d7c81db0e7c304a7bd757a76d2fbeaff80e>

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-2026-97945>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-97945/>. Everything for agents: <https://agentprime.io/llms.txt>.