# ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling

CVE record · `CVE-2026-93811`

- **Identifiers:** `CVE-2026-93811`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 24 Sept 2026
- **Updated:** 3 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 24 Sept 2026, 16:02 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: `cb69d4d6f709f87c94afa28ae64c501576692171 to before f46a70a082bdbfecbe074af8a719c26c4deb58c6` (git)
  - affected: `8f0541186e9ad1b62accc9519cc2b7a7240272a7 to before 86c2625fb9863139b359805fc6be1e31edbd3d65` (git)
  - affected: `8f0541186e9ad1b62accc9519cc2b7a7240272a7 to before edc17db83085624a2b1bacf6a4521d7f15571737` (git)
  - affected: `8f0541186e9ad1b62accc9519cc2b7a7240272a7 to before c3836f55e0dab96314774215e12d87f63fa919f2` (git)
  - affected: `8f0541186e9ad1b62accc9519cc2b7a7240272a7 to before 6e6329322ad733c5b23555c609353841560b26bc` (git)
  - affected: `8f0541186e9ad1b62accc9519cc2b7a7240272a7 to before d708a36634bb7b6f94d0e76d587d2ec50b2b93b5` (git)
  - affected: `6e8f4abf584253cbaa596ea4ad13110cf61cd4c9` (git)
  - affected: `8e33102309bd6839b2e2e158f93a7b378cb4655d` (git)
  - affected: `5.15.62 to before 5.15.222` (semver)
  - affected: `5.18.18 to before 5.19` (semver)
  - affected: `5.19.2 to before 5.20` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.0`
  - unaffected: `before 6.0` (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 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

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0017, the 6th percentile, on 12 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 24 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93811](https://www.cve.org/CVERecord?id=CVE-2026-93811)
- [NVD: CVE-2026-93811](https://nvd.nist.gov/vuln/detail/CVE-2026-93811)

### References from the CNA

- <https://git.kernel.org/stable/c/f46a70a082bdbfecbe074af8a719c26c4deb58c6>
- <https://git.kernel.org/stable/c/86c2625fb9863139b359805fc6be1e31edbd3d65>
- <https://git.kernel.org/stable/c/edc17db83085624a2b1bacf6a4521d7f15571737>
- <https://git.kernel.org/stable/c/c3836f55e0dab96314774215e12d87f63fa919f2>
- <https://git.kernel.org/stable/c/6e6329322ad733c5b23555c609353841560b26bc>
- <https://git.kernel.org/stable/c/d708a36634bb7b6f94d0e76d587d2ec50b2b93b5>

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-2026-93811>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93811/>. Everything for agents: <https://agentprime.io/llms.txt>.