CVE-2026-64290iommufd: Break the loop on failure in iommufd_fault_fops_read()
- 5.5MediumCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 95% 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: iommufd: Break the loop on failure in iommufd_fault_fops_read() On a copy_to_user() failure inside the inner list_for_each_entry, only the inner loop breaks; the outer while re-fetches the just-restored fault group and retries the failing copy_to_user() forever, spinning the reader at 100% CPU with fault->mutex held. Check rc after the inner loop and break the outer while as well.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 months 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 |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 07838f7fd529c8a6de44b601d4b7057e6c8d36ed – < a38e0714affc5c0bbb40cba5a65d6d32a5e72a71
- affected 07838f7fd529c8a6de44b601d4b7057e6c8d36ed – < 5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8
- affected 07838f7fd529c8a6de44b601d4b7057e6c8d36ed – < f66c16b175509642ee7082df57c9bf3deaebae1a
- affected 07838f7fd529c8a6de44b601d4b7057e6c8d36ed – < 172fc8b19825a0f5884c38f2289188284e2d45ee
- affected 6.11
- unaffected < 6.11
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/a38e0714affc5c0bbb40cba5a65d6d32a5e72a71 (opens in a new tab)
- https://git.kernel.org/stable/c/5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8 (opens in a new tab)
- https://git.kernel.org/stable/c/f66c16b175509642ee7082df57c9bf3deaebae1a (opens in a new tab)
- https://git.kernel.org/stable/c/172fc8b19825a0f5884c38f2289188284e2d45ee (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-2026-49002 (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-2026-64290)Record last updated .