# cifs: Fix server use-after-free in cifs_chan_skip_or_disable()

CVE record · `CVE-2026-98261`

- **Identifiers:** `CVE-2026-98261`
- **State:** Confirmed
- **Severity:** CVSS 8.1 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 6 Oct 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 6 Oct 2026, 08:45 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: `50e8363ecc85da49764781da90ebffe1a657b370 to before 0338489960ddad6368bce55e8adbc176c523093d` (git)
  - affected: `f591062bdbf4742b7f1622173017f19e927057b0 to before edd52eae5fcfb8433b6bb0e7cd98db438fe01227` (git)
  - affected: `f591062bdbf4742b7f1622173017f19e927057b0 to before fcc0a935bb6e37ecbf7e4335061309f896f35780` (git)
  - affected: `f591062bdbf4742b7f1622173017f19e927057b0 to before 7a1b27780b113583a94256d58dabfe7c0d9286e7` (git)
  - affected: `f591062bdbf4742b7f1622173017f19e927057b0 to before 717e0a25036b6c92cecace30913b2d874a4c22b8` (git)
  - affected: `d61ba1d71ea6039eca7ada870bf3f0c3c8fc12e4` (git)
  - affected: `6.6.15 to before 6.6.158` (semver)
  - affected: `6.7.3 to before 6.8` (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:H/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0040, the 35th percentile, on 10 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 6 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98261](https://www.cve.org/CVERecord?id=CVE-2026-98261)
- [NVD: CVE-2026-98261](https://nvd.nist.gov/vuln/detail/CVE-2026-98261)

### References from the CNA

- <https://git.kernel.org/stable/c/0338489960ddad6368bce55e8adbc176c523093d>
- <https://git.kernel.org/stable/c/edd52eae5fcfb8433b6bb0e7cd98db438fe01227>
- <https://git.kernel.org/stable/c/fcc0a935bb6e37ecbf7e4335061309f896f35780>
- <https://git.kernel.org/stable/c/7a1b27780b113583a94256d58dabfe7c0d9286e7>
- <https://git.kernel.org/stable/c/717e0a25036b6c92cecace30913b2d874a4c22b8>

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-2026-98261>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98261/>. Everything for agents: <https://agentprime.io/llms.txt>.