# ceph: bound MDSCapAuth path and fs_name decode in handle_session()

CVE record · `CVE-2026-89651`

- **Identifiers:** `CVE-2026-89651`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:45 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.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `1d17de9534cb5a4c4c380d174cc2f9281b34f89e to before dc5c7dffda92ef372fa587c444a1c537373df824` (git)
  - affected: `1d17de9534cb5a4c4c380d174cc2f9281b34f89e to before c37db86d2b5e9b57001ccae7e7a727e95a4f9c02` (git)
  - affected: `1d17de9534cb5a4c4c380d174cc2f9281b34f89e to before 5f892c767b30e4fb0c744c59f9235c717383d2cd` (git)
  - affected: `1d17de9534cb5a4c4c380d174cc2f9281b34f89e to before 77933e22adfe813be2bd10be08d6e950103c3967` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.10`
  - unaffected: `before 6.10` (semver)
  - unaffected: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 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

- 9.8 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0063, the 51st 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-2026-89651](https://www.cve.org/CVERecord?id=CVE-2026-89651)
- [NVD: CVE-2026-89651](https://nvd.nist.gov/vuln/detail/CVE-2026-89651)

### References from the CNA

- <https://git.kernel.org/stable/c/dc5c7dffda92ef372fa587c444a1c537373df824>
- <https://git.kernel.org/stable/c/c37db86d2b5e9b57001ccae7e7a727e95a4f9c02>
- <https://git.kernel.org/stable/c/5f892c767b30e4fb0c744c59f9235c717383d2cd>
- <https://git.kernel.org/stable/c/77933e22adfe813be2bd10be08d6e950103c3967>

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-2026-89651>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-89651/>. Everything for agents: <https://agentprime.io/llms.txt>.