CVE-2026-64291

5.5 Moyenne

Publiée le 25/07/2026 à 12:17 · Modifiée le 17/08/2026 à 07:17 · Analysée par le NVD · Source : 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Description

In the Linux kernel, the following vulnerability has been resolved: iommufd: Set veventq_depth upper bound iommufd_veventq_alloc() accepts any !0 veventq_depth from userspace, with an upper bound at U32_MAX. This leaves a vulnerability where userspace can allocate excessively large queues to exhaust kernel memory reserves. Cap the veventq_depth (maximum number of entries) to 1 << 19, matching the maximum number of entries in the SMMUv3 EVTQ (the largest use case today).

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Produits concernés

Linux
Linux linux kernel

Scores CVSS

Version	Score	Source	Vecteur
3.1	5.5 Moyenne	nvd@nist.gov (NVD)	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`

Références

https://git.kernel.org/stable/c/6ebf2eb46fbd5b40393ff8fbb847ba96925beaff Patch
https://git.kernel.org/stable/c/e7b5e55652746b1221b9c10ff80eae8a154101ba Patch
https://git.kernel.org/stable/c/f565297edf316016be4a1a9e2eb9f39359313f43 Patch

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories