# smb: client: fix use-after-free of iface in cifs_try_adding_channels()

CVE record · `CVE-2026-98173`

- **Identifiers:** `CVE-2026-98173`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 6 Oct 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 6 Oct 2026, 08:44 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: `aa45dadd34e44fcd6a9df4b395bee5b5633b4cec to before 93e8a49adb2a575202c5ee766435eff2f9f95f5b` (git)
  - affected: `aa45dadd34e44fcd6a9df4b395bee5b5633b4cec to before ee0d8f83d68f6e6509f092c997ccab3c8c801538` (git)
  - affected: `aa45dadd34e44fcd6a9df4b395bee5b5633b4cec to before c941f1ebfd26f683de81091473f3596a218abff0` (git)
  - affected: `aa45dadd34e44fcd6a9df4b395bee5b5633b4cec to before e99040e5e9c60441e6b4725e1a7b88c3106ae903` (git)
  - affected: `aa45dadd34e44fcd6a9df4b395bee5b5633b4cec to before ec36b38e65596950e6c29bed7dfc90b98707c19c` (git)
  - affected: `aa45dadd34e44fcd6a9df4b395bee5b5633b4cec to before d034e836eefd7ce75e588f7031cffbeec594f5ac` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.19`
  - unaffected: `before 5.19` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0034, the 28th percentile, on 11 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-2026-98173](https://www.cve.org/CVERecord?id=CVE-2026-98173)
- [NVD: CVE-2026-98173](https://nvd.nist.gov/vuln/detail/CVE-2026-98173)

### References from the CNA

- <https://git.kernel.org/stable/c/93e8a49adb2a575202c5ee766435eff2f9f95f5b>
- <https://git.kernel.org/stable/c/ee0d8f83d68f6e6509f092c997ccab3c8c801538>
- <https://git.kernel.org/stable/c/c941f1ebfd26f683de81091473f3596a218abff0>
- <https://git.kernel.org/stable/c/e99040e5e9c60441e6b4725e1a7b88c3106ae903>
- <https://git.kernel.org/stable/c/ec36b38e65596950e6c29bed7dfc90b98707c19c>
- <https://git.kernel.org/stable/c/d034e836eefd7ce75e588f7031cffbeec594f5ac>

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-2026-98173>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-98173/>. Everything for agents: <https://agentprime.io/llms.txt>.