PT-2025-35999 · Linux+3 · Linux Kernel+3

Published 2025-07-30 · Updated 2026-04-07 · CVE-2025-38726

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 The Linux kernel contains a flaw in the ftgmac100 phy disconnect function within the ftgmac100 module. A potential NULL pointer access could occur because netdev->phydev is reset to NULL after calling phy disconnect(), leading to fixed phy unregister() being called with a NULL pointer argument. The issue is resolved by caching the phy device before the call to phy disconnect().

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

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2025-15747

CVE-2025-38726

Affected Products

Astra Linux

Linux Kernel

Red Os

Ftgmac100

References · 23

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38726.json · Exploit
• https://osv.dev/vulnerability/CVE-2025-38726 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-38726 · Vendor Advisory
• https://git.kernel.org/stable/c/9ad90dd34b4e8e5be1e45a4559f4de0f14e53af2 · Patch
• https://bdu.fstec.ru/vul/2025-15747 · Security Note
• https://git.kernel.org/stable/c/ae59ec969c07c73f0610f8bd7e648f01e798d222 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-38726 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-38726 · Vendor Advisory
• https://git.kernel.org/stable/c/e88fbc30dda1cb7438515303704ceddb3ade4ecd · Patch
• https://cve.org/CVERecord?id=CVE-2025-38726 · Security Note
• https://git.kernel.org/stable/c/44bcd397ad9cd1a6b25fabb7f5edbee4fb0cfc2e · Patch
• https://osv.dev/vulnerability/BELL-CVE-2025-38726 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-38726 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se18-bulletin-2025-1113SE18 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38726 · Vendor Advisory