PT-2025-33792 · Linux+1 · Linux Kernel+1

Published 2025-07-23 · Updated 2025-08-19 · CVE-2025-38594

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Linux kernel (affected versions not specified)

Description: The Linux kernel contains a use-after-free (UAF) flaw within the iommu/vt-d subsystem, specifically during the unbinding of SVA (Second Virtual Address) with pending IOPFs (I/O Page Faults). A commit (17fce9d2336d) intended to disable IOPF on device detachment incorrectly did so while pending IOPFs were still present, potentially leading to a UAF error and kernel panic. The intel pasid tear down entry() function is responsible for blocking hardware from generating new page faults and flushing in-flight ones.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2026-01561

CVE-2025-38594

Affected Products

Astra Linux

Linux Kernel

References · 13

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38594.json · Exploit
• https://ubuntu.com/security/CVE-2025-38594 · Vendor Advisory
• https://git.kernel.org/stable/c/f0b9d31c6edd50a6207489cd1bd4ddac814b9cd2 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-38594 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-38594 · Security Note
• https://git.kernel.org/stable/c/c68332b7ee893292bba6e87d31ef2080c066c65d · Patch
• https://osv.dev/vulnerability/CVE-2025-38594 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-38594 · Security Note
• https://bdu.fstec.ru/vul/2026-01561 · Security Note
• https://twitter.com/CVEnew/status/1957854137359691962 · Twitter Post
• https://git.kernel.org/linus/f0b9d31c6edd50a6207489cd1bd4ddac814b9cd2 · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://lore.kernel.org/linux-cve-announce/2025081918-CVE-2025-38594-d686@gregkh · Note