PT-2025-34434 · Linux+1 · Linux Kernel+1

Published 2025-07-17 · Updated 2026-05-26 · CVE-2025-38673

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description: A revert was implemented to address an issue where the dma buf field in the drm gem object structure became unstable during the object instance's lifetime. Specifically, the field could become NULL when user space released the final GEM handle on the buffer object, leading to a NULL-pointer dereference. Previous workarounds did not fully resolve the problem, particularly for buffer objects without an associated DRM framebuffer. The revert returns to using .import attach->dmabuf.

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

Exploit

Improper Resource Release

NULL Pointer Dereference

Weakness Enumeration

CWE-404

CWE-476

Related Identifiers

BDU:2026-01334

CVE-2025-38673

Affected Products

Astra Linux

Linux Kernel

References · 16

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38673.json · Exploit
• https://osv.dev/vulnerability/CVE-2025-38673 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2025-38673 · Vendor Advisory
• https://git.kernel.org/stable/c/e31f5a1c2cd38bf977736cdfa79444e19d4005ec · Patch
• https://cve.org/CVERecord?id=CVE-2025-38673 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2025-38673 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-01334 · Security Note
• https://git.kernel.org/stable/c/2712ca878b688682ac2ce02aefc413fc76019cd9 · Patch
• https://ubuntu.com/security/CVE-2025-38673 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-38673 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-38673 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://git.kernel.org/linus/2712ca878b688682ac2ce02aefc413fc76019cd9 · Note
• https://twitter.com/CVEnew/status/1958933876660650090 · Twitter Post
• https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.15.9 · Note