# mm/migrate_device: clear stale mapping after freeing swapcache

CVE record · `CVE-2026-89755`

- **Identifiers:** `CVE-2026-89755`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 6 Nov 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:46 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: `df263d9a7dffee94ca5391120ee3b0587efa07f1 to before 92db780dd644590c751246187e1229d5ac2e5544` (git)
  - affected: `df263d9a7dffee94ca5391120ee3b0587efa07f1 to before 4fa91f7bbc4135240b67daac03fc17d9e180a331` (git)
  - affected: `df263d9a7dffee94ca5391120ee3b0587efa07f1 to before c9c29481d5d4a985a57ece2090a324ba48e362a7` (git)
  - affected: `df263d9a7dffee94ca5391120ee3b0587efa07f1 to before 8ffedc6573a665cdc31ebe47eae7b32b78d0df83` (git)
  - affected: `df263d9a7dffee94ca5391120ee3b0587efa07f1 to before 34a00895d032a414830d41106a09329ae6c251b6` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.6`
  - unaffected: `before 6.6` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.111 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.61 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 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:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0016, the 4th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 11 Sept 2026, 19:46 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-89755)
- 11 Sept 2026, 20:20 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-89755)

## Sources

- [CVE List: CVE-2026-89755](https://www.cve.org/CVERecord?id=CVE-2026-89755)
- [NVD: CVE-2026-89755](https://nvd.nist.gov/vuln/detail/CVE-2026-89755)

### References from the CNA

- <https://git.kernel.org/stable/c/92db780dd644590c751246187e1229d5ac2e5544>
- <https://git.kernel.org/stable/c/4fa91f7bbc4135240b67daac03fc17d9e180a331>
- <https://git.kernel.org/stable/c/c9c29481d5d4a985a57ece2090a324ba48e362a7>
- <https://git.kernel.org/stable/c/8ffedc6573a665cdc31ebe47eae7b32b78d0df83>
- <https://git.kernel.org/stable/c/34a00895d032a414830d41106a09329ae6c251b6>

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-2026-89755>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-89755/>. Everything for agents: <https://agentprime.io/llms.txt>.