# mm/mglru: fix and remove redundant unevictable folio handling

CVE record · `CVE-2026-89757`

- **Identifiers:** `CVE-2026-89757`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 30 Oct 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: `ac35a490237446b71e3b4b782b1596967edd0aa8 to before e9f2160081a1e3ebb285bd71be3382abaeb8390a` (git)
  - affected: `ac35a490237446b71e3b4b782b1596967edd0aa8 to before b1d7c69e6c7d3ec47513b911ce7529e56d183dad` (git)
  - affected: `ac35a490237446b71e3b4b782b1596967edd0aa8 to before 49193dac48d30eee2a21da88a7262d52a7feefae` (git)
  - affected: `ac35a490237446b71e3b4b782b1596967edd0aa8 to before 54a58d6656dd403b686b247f0bad8507cbfb45df` (git)
  - affected: `ac35a490237446b71e3b4b782b1596967edd0aa8 to before 15d3a2a71c8bf7333d019d249ee33669e69e4275` (git)
  - affected: `ac35a490237446b71e3b4b782b1596967edd0aa8 to before f7e698e326b239a91ea15844817551921209e826` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.1`
  - unaffected: `before 6.1` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.51 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

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Linux kernel versions from 6.1 before the fixes are affected, in the multi-generational LRU memory management code. Unevictable folios can be mishandled, so they stay unevictable after munlock and the Mlocked accounting stays inflated, and a race may cause unexpected behavior. The source gives few details on what access an attacker would need. Upgrade to 6.1.191, 6.6.160, 6.12.114, or 6.18.51, or any later release in those series.

Written 12 Nov 2026.

## 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 11th percentile, on 14 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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89757](https://www.cve.org/CVERecord?id=CVE-2026-89757)
- [NVD: CVE-2026-89757](https://nvd.nist.gov/vuln/detail/CVE-2026-89757)

### References from the CNA

- <https://git.kernel.org/stable/c/e9f2160081a1e3ebb285bd71be3382abaeb8390a>
- <https://git.kernel.org/stable/c/b1d7c69e6c7d3ec47513b911ce7529e56d183dad>
- <https://git.kernel.org/stable/c/49193dac48d30eee2a21da88a7262d52a7feefae>
- <https://git.kernel.org/stable/c/54a58d6656dd403b686b247f0bad8507cbfb45df>
- <https://git.kernel.org/stable/c/15d3a2a71c8bf7333d019d249ee33669e69e4275>
- <https://git.kernel.org/stable/c/f7e698e326b239a91ea15844817551921209e826>

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-2026-89757>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89757/>. Everything for agents: <https://agentprime.io/llms.txt>.