CVE-2026-89448iommu/vt-d: Force requesting ACS when tboot is enabled
- 9.3CriticalCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 96% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Force requesting ACS when tboot is enabled Currently the conditions of requesting ACS in detect_intel_iommu() don't include tboot, leading to a possible misconfiguration with ACS disabled (e.g. due to user opts) while iommu is later forced on by tboot_force_iommu(). Fix it by checking tboot in detect_intel_iommu().
Timeline
ID reserved
By Linux
Published
- 49 days later
· 49 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 96% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.3.
Affected products
- affected 5d990b627537e59a3a2f039ff588a4750e9c1a6a – < 3fd2b60ea9bd18348f5e971678f31041ef211047
- affected 5d990b627537e59a3a2f039ff588a4750e9c1a6a – < 579eb867d3da63f3b5e32f235925e1daa7ec70d0
- affected 5d990b627537e59a3a2f039ff588a4750e9c1a6a – < aaeb81241e802c86be69394f72d49fde3f861fbb
- affected 5d990b627537e59a3a2f039ff588a4750e9c1a6a – < 45705a6bfdb283f7b3b509010fd617b72f942537
- affected 5d990b627537e59a3a2f039ff588a4750e9c1a6a – < 87bc611c6c98a41c00feb7b06b0c297dd141a2ae
- affected 5d990b627537e59a3a2f039ff588a4750e9c1a6a – < 607432b2618b61df81134be0ef2562b8300c1216
- affected 2.6.33
- unaffected < 2.6.33
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/3fd2b60ea9bd18348f5e971678f31041ef211047 (opens in a new tab)
- https://git.kernel.org/stable/c/579eb867d3da63f3b5e32f235925e1daa7ec70d0 (opens in a new tab)
- https://git.kernel.org/stable/c/aaeb81241e802c86be69394f72d49fde3f861fbb (opens in a new tab)
- https://git.kernel.org/stable/c/45705a6bfdb283f7b3b509010fd617b72f942537 (opens in a new tab)
- https://git.kernel.org/stable/c/87bc611c6c98a41c00feb7b06b0c297dd141a2ae (opens in a new tab)
- https://git.kernel.org/stable/c/607432b2618b61df81134be0ef2562b8300c1216 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76354 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89448)Record last updated .