What is GHSA-953v-7jq6-jh93?

GHSA-953v-7jq6-jh93 is a security advisory published by GitHub Security Advisories with High severity. In the Linux kernel, the following vulnerability has been resolved: iommupt: Check for missing...

Which CVE IDs does GHSA-953v-7jq6-jh93 cover?

GHSA-953v-7jq6-jh93 covers the following CVE IDs: CVE-2026-64151. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-953v-7jq6-jh93?

GHSA-953v-7jq6-jh93 has a CVSS v3 base score of 8.4, published by GitHub Security Advisories.

GHSA-953v-7jq6-jh93HighCVSS 8.4

In the Linux kernel, the following vulnerability has been resolved: iommupt: Check for missing...

Vendor

GitHub Security Advisories

Published

July 19, 2026

Last Modified

July 20, 2026

🔗 CVE IDs covered (1)

CVE-2026-64151 →

📋 Description

In the Linux kernel, the following vulnerability has been resolved:

iommupt: Check for missing PAGE_SIZE in the pgsize_bitmap

Sashiko pointed out that the driver could drop PAGE_SIZE from the pgsize_bitmap. That is technically allowed but nothing does it, and such an iommu_domain would not be used with the DMA API today.

Still, it is against the design and it is trivial to fix up. Lift the PT_WARN_ON to the if branch and just skip the fast path.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-64151
https://git.kernel.org/stable/c/00850f41da24423587abd6124a790dd4f12bcef3
https://git.kernel.org/stable/c/8ef3f77c440005c7f04229a75976bfc078364247
https://github.com/advisories/GHSA-953v-7jq6-jh93