# smb: client: fix heap overflow in cifs_do_set_acl()

CVE record · `CVE-2026-99110`

- **Identifiers:** `CVE-2026-99110`
- **State:** Confirmed
- **Severity:** CVSS 7.0 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, 10:34 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: `dc1af4c4b4721abfa07b351063825acc7e69cc66 to before 68652afb9b9adf70125971abee9b95341e042249` (git)
  - affected: `dc1af4c4b4721abfa07b351063825acc7e69cc66 to before 9312a00215602ba028495ef3fa00fb84af0478e0` (git)
  - affected: `dc1af4c4b4721abfa07b351063825acc7e69cc66 to before d96f3365ce61c5f39602955af43c8174548dee98` (git)
  - affected: `dc1af4c4b4721abfa07b351063825acc7e69cc66 to before 596b4062e6c75bdd85a7f2b7f2087a872dc420ac` (git)
  - affected: `dc1af4c4b4721abfa07b351063825acc7e69cc66 to before 1dac61e2c29d1a71784604b48cf3b1234a65ec29` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.2`
  - unaffected: `before 6.2` (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

- 7.0 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:H/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, 10:34 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-99110)

## Sources

- [CVE List: CVE-2026-99110](https://www.cve.org/CVERecord?id=CVE-2026-99110)
- [NVD: CVE-2026-99110](https://nvd.nist.gov/vuln/detail/CVE-2026-99110)

### References from the CNA

- <https://git.kernel.org/stable/c/68652afb9b9adf70125971abee9b95341e042249>
- <https://git.kernel.org/stable/c/9312a00215602ba028495ef3fa00fb84af0478e0>
- <https://git.kernel.org/stable/c/d96f3365ce61c5f39602955af43c8174548dee98>
- <https://git.kernel.org/stable/c/596b4062e6c75bdd85a7f2b7f2087a872dc420ac>
- <https://git.kernel.org/stable/c/1dac61e2c29d1a71784604b48cf3b1234a65ec29>

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-2026-99110>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99110/>. Everything for agents: <https://agentprime.io/llms.txt>.