# smb: client: fix use-before-check of ReparseDataLength in reparse_buf_ptr()

CVE record · `CVE-2026-89632`

- **Identifiers:** `CVE-2026-89632`
- **State:** Confirmed
- **Severity:** CVSS 8.2 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 21 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.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `a158bb66b1373866d9fd5997565a58a573085539 to before b70bc592afd19732e2e4563300ebe8f974280365` (git)
  - affected: `67ec9949b0dfe78c99e110dd975eb7dc5645630c to before 711cf71300d7992f450600df8864917d3538679f` (git)
  - affected: `67ec9949b0dfe78c99e110dd975eb7dc5645630c to before 05f78e6cf34ea3a285053bd5999e08e8ac298bd5` (git)
  - affected: `6.6.32 to before 6.6.160` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.8`
  - unaffected: `before 6.8` (semver)
  - unaffected: `6.6.160 to 6.6.*, 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0055, the 46th 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-2026-89632](https://www.cve.org/CVERecord?id=CVE-2026-89632)
- [NVD: CVE-2026-89632](https://nvd.nist.gov/vuln/detail/CVE-2026-89632)

### References from the CNA

- <https://git.kernel.org/stable/c/b70bc592afd19732e2e4563300ebe8f974280365>
- <https://git.kernel.org/stable/c/711cf71300d7992f450600df8864917d3538679f>
- <https://git.kernel.org/stable/c/05f78e6cf34ea3a285053bd5999e08e8ac298bd5>

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-2026-89632>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89632/>. Everything for agents: <https://agentprime.io/llms.txt>.