# firmware: arm_scmi: Avoid IDR updates while cleaning channels

CVE record · `CVE-2026-93086`

- **Identifiers:** `CVE-2026-93086`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:11 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: `22f7f35fd71b597a5d916e41d7646be6ee530c86 to before f50698c617350a6e2064dffd6cff3f391e142f55` (git)
  - affected: `05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 to before aed24a3c63920539e9de7fbfe7929a2e7c888cd2` (git)
  - affected: `05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 to before 431c6b872ba7fedcc5a3afb0ec3517db4d95d088` (git)
  - affected: `05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 to before 54e5a4f7d83db4552d963d0785be32d9df680dcd` (git)
  - affected: `05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 to before bab26acebe55e8ad3ab545abda72faa7ca28c477` (git)
  - affected: `05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 to before c38b1e19485aaa820e52cfe162525a8af67563da` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.3`
  - unaffected: `before 6.3` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The Linux kernel's arm_scmi firmware driver is affected from version 6.3 until fixed. The source gives few details on attacker requirements or impact, only that channel cleanup could invalidate iterator state by removing entries during an IDR walk. Upgrade to 6.6.157, 6.12.110, 6.18.52, or 7.2.6 (or a later release in the same series).

Written 12 Nov 2026.

## 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:** 0.0021, the 10th percentile, on 14 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93086](https://www.cve.org/CVERecord?id=CVE-2026-93086)
- [NVD: CVE-2026-93086](https://nvd.nist.gov/vuln/detail/CVE-2026-93086)

### References from the CNA

- <https://git.kernel.org/stable/c/f50698c617350a6e2064dffd6cff3f391e142f55>
- <https://git.kernel.org/stable/c/aed24a3c63920539e9de7fbfe7929a2e7c888cd2>
- <https://git.kernel.org/stable/c/431c6b872ba7fedcc5a3afb0ec3517db4d95d088>
- <https://git.kernel.org/stable/c/54e5a4f7d83db4552d963d0785be32d9df680dcd>
- <https://git.kernel.org/stable/c/bab26acebe55e8ad3ab545abda72faa7ca28c477>
- <https://git.kernel.org/stable/c/c38b1e19485aaa820e52cfe162525a8af67563da>

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-2026-93086>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93086/>. Everything for agents: <https://agentprime.io/llms.txt>.