# iommu/vt-d: Flush context cache with correct SID when tearing down aliases

CVE record · `CVE-2026-90240`

- **Identifiers:** `CVE-2026-90240`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 21 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:07 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: `f90584f4beb84211c4d21b319cc13f391fe9f3c2 to before 3eb6ad14ef359e426cff14942e220de101cdbe84` (git)
  - affected: `f90584f4beb84211c4d21b319cc13f391fe9f3c2 to before a803141597d61dc0511f7cd849625e17d042ca8a` (git)
  - affected: `f90584f4beb84211c4d21b319cc13f391fe9f3c2 to before 5baddf100b3be730912485648cbaae5e3a251923` (git)
  - affected: `f90584f4beb84211c4d21b319cc13f391fe9f3c2 to before c54e4ae971b98e8d650400137d332cee56c03f55` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.11`
  - unaffected: `before 6.11` (semver)
  - unaffected: `6.12.114 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

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0016, the 5th percentile, on 13 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-2026-90240](https://www.cve.org/CVERecord?id=CVE-2026-90240)
- [NVD: CVE-2026-90240](https://nvd.nist.gov/vuln/detail/CVE-2026-90240)

### References from the CNA

- <https://git.kernel.org/stable/c/3eb6ad14ef359e426cff14942e220de101cdbe84>
- <https://git.kernel.org/stable/c/a803141597d61dc0511f7cd849625e17d042ca8a>
- <https://git.kernel.org/stable/c/5baddf100b3be730912485648cbaae5e3a251923>
- <https://git.kernel.org/stable/c/c54e4ae971b98e8d650400137d332cee56c03f55>

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-2026-90240>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90240/>. Everything for agents: <https://agentprime.io/llms.txt>.