# smb: client: split cifsFileInfo bitfields to avoid shared-byte RMW races

CVE record · `CVE-2026-98681`

- **Identifiers:** `CVE-2026-98681`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 18 Oct 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 18 Oct 2026, 15:45 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: `3bc303c254335dbd7c7012cc1760b12f1d5514d3 to before f255e87b4f7eda568c37d6eae5db1d1a8aca5968` (git)
  - affected: `3bc303c254335dbd7c7012cc1760b12f1d5514d3 to before 7fa619367869be705942f087b2ecd209efc78fe1` (git)
  - affected: `3bc303c254335dbd7c7012cc1760b12f1d5514d3 to before e961baf9c1a4f2e93a55f8eb2c6151fc27b96a4c` (git)
  - affected: `3bc303c254335dbd7c7012cc1760b12f1d5514d3 to before 3b8e7928cf1928555dc05d172dd02fb0e7692ec4` (git)
  - affected: `3bc303c254335dbd7c7012cc1760b12f1d5514d3 to before 3786ee67658a2c80fef2544e7de2cd329e043cf9` (git)
  - affected: `3bc303c254335dbd7c7012cc1760b12f1d5514d3 to before 4165641d06ef44f3a31b77a28048b6c737e885e7` (git)
  - affected: `3bc303c254335dbd7c7012cc1760b12f1d5514d3 to before d9d23d115610e0342e768f6cb525d91c7b154027` (git)
  - affected: `3bc303c254335dbd7c7012cc1760b12f1d5514d3 to before 19465a9aeb664f1d710d0d22c07c31bfb7c85446` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.32`
  - unaffected: `before 2.6.32` (semver)
  - unaffected: `5.10.273 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.224 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.113 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.56 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.10 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0018, the 7th percentile, on 7 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 18 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98681](https://www.cve.org/CVERecord?id=CVE-2026-98681)
- [NVD: CVE-2026-98681](https://nvd.nist.gov/vuln/detail/CVE-2026-98681)

### References from the CNA

- <https://git.kernel.org/stable/c/f255e87b4f7eda568c37d6eae5db1d1a8aca5968>
- <https://git.kernel.org/stable/c/7fa619367869be705942f087b2ecd209efc78fe1>
- <https://git.kernel.org/stable/c/e961baf9c1a4f2e93a55f8eb2c6151fc27b96a4c>
- <https://git.kernel.org/stable/c/3b8e7928cf1928555dc05d172dd02fb0e7692ec4>
- <https://git.kernel.org/stable/c/3786ee67658a2c80fef2544e7de2cd329e043cf9>
- <https://git.kernel.org/stable/c/4165641d06ef44f3a31b77a28048b6c737e885e7>
- <https://git.kernel.org/stable/c/d9d23d115610e0342e768f6cb525d91c7b154027>
- <https://git.kernel.org/stable/c/19465a9aeb664f1d710d0d22c07c31bfb7c85446>

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-2026-98681>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98681/>. Everything for agents: <https://agentprime.io/llms.txt>.