# unicode: free the map after a grace period

CVE record · `CVE-2026-99180`

- **Identifiers:** `CVE-2026-99180`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 28 Oct 2026
- **Updated:** 31 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: `b886ee3e778ec2ad43e276fd378ab492cf6819b7 to before 092e14e1479a39157ca01668d43e4649793f39ed` (git)
  - affected: `b886ee3e778ec2ad43e276fd378ab492cf6819b7 to before 6472455f2b015cad43adb790cb63fe1d3cff2f57` (git)
  - affected: `b886ee3e778ec2ad43e276fd378ab492cf6819b7 to before f96c2731a105d6663c606388f5dc21781e00ade5` (git)
  - affected: `b886ee3e778ec2ad43e276fd378ab492cf6819b7 to before 5d7687b0b71601cc32f1bfd62f56cf5eea3e5a07` (git)
  - affected: `b886ee3e778ec2ad43e276fd378ab492cf6819b7 to before 69a0d6b31d05e856c7335509222f25321e3c69ca` (git)
  - affected: `b886ee3e778ec2ad43e276fd378ab492cf6819b7 to before 2b54d3c971a1e5df3c9b0bcc10311ae6c29e79d8` (git)
  - affected: `b886ee3e778ec2ad43e276fd378ab492cf6819b7 to before 6560c3d9a6925e3747d9ad8463e16010c31ba715` (git)
  - affected: `b886ee3e778ec2ad43e276fd378ab492cf6819b7 to before a96c5299bd7305eb984377681eb3222a57376405` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.2`
  - unaffected: `before 5.2` (semver)
  - unaffected: `5.10.273 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.224 to 5.15.*, inclusive` (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

- 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:** 0.0013, the 2nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 28 Oct 2026, 10:35 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-99180)

## Sources

- [CVE List: CVE-2026-99180](https://www.cve.org/CVERecord?id=CVE-2026-99180)
- [NVD: CVE-2026-99180](https://nvd.nist.gov/vuln/detail/CVE-2026-99180)

### References from the CNA

- <https://git.kernel.org/stable/c/092e14e1479a39157ca01668d43e4649793f39ed>
- <https://git.kernel.org/stable/c/6472455f2b015cad43adb790cb63fe1d3cff2f57>
- <https://git.kernel.org/stable/c/f96c2731a105d6663c606388f5dc21781e00ade5>
- <https://git.kernel.org/stable/c/5d7687b0b71601cc32f1bfd62f56cf5eea3e5a07>
- <https://git.kernel.org/stable/c/69a0d6b31d05e856c7335509222f25321e3c69ca>
- <https://git.kernel.org/stable/c/2b54d3c971a1e5df3c9b0bcc10311ae6c29e79d8>
- <https://git.kernel.org/stable/c/6560c3d9a6925e3747d9ad8463e16010c31ba715>
- <https://git.kernel.org/stable/c/a96c5299bd7305eb984377681eb3222a57376405>

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-2026-99180>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99180/>. Everything for agents: <https://agentprime.io/llms.txt>.