# smb: client: fix missing iov bounds check in parse_posix_sids()

CVE record · `CVE-2026-98405`

- **Identifiers:** `CVE-2026-98405`
- **State:** Confirmed
- **Severity:** CVSS 8.1 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 14 Oct 2026
- **Updated:** 24 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 14 Oct 2026, 13:27 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: `a90f37e3d7acfd9824f162830583bbf7846fe252 to before d91b9a3b2b38e5ac1b51e9e5b23fe53ad7b49644` (git)
  - affected: `858e74876c5cbff1dfd5bace99e32fbce2abd4b5 to before b862996e5105be1293da9cdc85da77b76021c3bd` (git)
  - affected: `858e74876c5cbff1dfd5bace99e32fbce2abd4b5 to before 2f8ed71aaaba3bc8b19cd9930cc62e63e142b299` (git)
  - affected: `858e74876c5cbff1dfd5bace99e32fbce2abd4b5 to before eac6917a42899aad0617bbf04798c5dd946a1fe5` (git)
  - affected: `858e74876c5cbff1dfd5bace99e32fbce2abd4b5 to before b09d092eb24ad0110f16a9b7c1ed5d2a0c1733dc` (git)
  - affected: `6.6.32 to before 6.6.158` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.8`
  - unaffected: `before 6.8` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.54 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.8 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0048, the 41st percentile, on 8 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 14 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98405](https://www.cve.org/CVERecord?id=CVE-2026-98405)
- [NVD: CVE-2026-98405](https://nvd.nist.gov/vuln/detail/CVE-2026-98405)

### References from the CNA

- <https://git.kernel.org/stable/c/d91b9a3b2b38e5ac1b51e9e5b23fe53ad7b49644>
- <https://git.kernel.org/stable/c/b862996e5105be1293da9cdc85da77b76021c3bd>
- <https://git.kernel.org/stable/c/2f8ed71aaaba3bc8b19cd9930cc62e63e142b299>
- <https://git.kernel.org/stable/c/eac6917a42899aad0617bbf04798c5dd946a1fe5>
- <https://git.kernel.org/stable/c/b09d092eb24ad0110f16a9b7c1ed5d2a0c1733dc>

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-2026-98405>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98405/>. Everything for agents: <https://agentprime.io/llms.txt>.