# ksmbd: prevent out-of-bounds reads in share config responses

CVE record · `CVE-2026-89792`

- **Identifiers:** `CVE-2026-89792`
- **State:** Confirmed
- **Severity:** CVSS 7.1 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 08:50 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: `88b7f1143b15b29cccb8392b4f38e75b7bb3e300 to before df8aa4a09733c4d3974b1db32c1782b3aad3a151` (git)
  - affected: `51a6c2af9d20203ddeeaf73314ba8854b38d01bd to before 0127f1c119bde40578f4d25f5d17333b4e75de8c` (git)
  - affected: `a637fabac554270a851033f5ab402ecb90bc479c to before fd636a87161def6e35876ab7943641ce457974c8` (git)
  - affected: `a677ebd8ca2f2632ccdecbad7b87641274e15aac to before ffa507f5f774cb4d45136b106989ebc051361263` (git)
  - affected: `a677ebd8ca2f2632ccdecbad7b87641274e15aac to before cd2bcee450bc94770be56c0b896c1a1dc6838bd8` (git)
  - affected: `a677ebd8ca2f2632ccdecbad7b87641274e15aac to before 61a8d06600c8c397f9a7e01940479d4c94a82f5f` (git)
  - affected: `a677ebd8ca2f2632ccdecbad7b87641274e15aac to before f25e93768fcc5d8287e50b1ec52a42e4c276df34` (git)
  - affected: `76af689a45aa44714b46d1a7de4ffdf851ded896` (git)
  - affected: `5.15.157 to before 5.15.222` (semver)
  - affected: `6.1.85 to before 6.1.189` (semver)
  - affected: `6.6.26 to before 6.6.158` (semver)
  - affected: `6.8.5 to before 6.9` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.9`
  - unaffected: `before 6.9` (semver)
  - unaffected: `5.15.222 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.189 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.111 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.53 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0016, the 5th 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89792](https://www.cve.org/CVERecord?id=CVE-2026-89792)
- [NVD: CVE-2026-89792](https://nvd.nist.gov/vuln/detail/CVE-2026-89792)

### References from the CNA

- <https://git.kernel.org/stable/c/df8aa4a09733c4d3974b1db32c1782b3aad3a151>
- <https://git.kernel.org/stable/c/0127f1c119bde40578f4d25f5d17333b4e75de8c>
- <https://git.kernel.org/stable/c/fd636a87161def6e35876ab7943641ce457974c8>
- <https://git.kernel.org/stable/c/ffa507f5f774cb4d45136b106989ebc051361263>
- <https://git.kernel.org/stable/c/cd2bcee450bc94770be56c0b896c1a1dc6838bd8>
- <https://git.kernel.org/stable/c/61a8d06600c8c397f9a7e01940479d4c94a82f5f>
- <https://git.kernel.org/stable/c/f25e93768fcc5d8287e50b1ec52a42e4c276df34>

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-2026-89792>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-89792/>. Everything for agents: <https://agentprime.io/llms.txt>.