CVE-2025-38518

MEDIUM

Linux Kernel - INVLPGB Disabled on Zen2 Due to TLB Flush Issue

Title source: llm

Description

In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Disable INVLPGB on Zen2 AMD Cyan Skillfish (Family 17h, Model 47h, Stepping 0h) has an issue that causes system oopses and panics when performing TLB flush using INVLPGB. However, the problem is that that machine has misconfigured CPUID and should not report the INVLPGB bit in the first place. So zap the kernel's representation of the flag so that nothing gets confused. [ bp: Massage. ]

References (2)

Core 2

Core References

Patch

https://git.kernel.org/stable/c/357f121517924e3ec3021f9d0dd0189adcd09867

Patch

https://git.kernel.org/stable/c/a74bb5f202dabddfea96abc1328fcedae8aa140a

Scores

CVSS v3 5.5

EPSS 0.0013

EPSS Percentile 2.8%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

Status published

Products (9)

linux/Kernel 6.15.0 - 6.15.7linux

Linux/Linux < 6.15

Linux/Linux 6.15

Linux/Linux 6.15.7 - 6.15.*

Linux/Linux 6.16

Linux/Linux 767ae437a32d644786c0779d0d54492ff9cbe574 - 357f121517924e3ec3021f9d0dd0189adcd09867

Linux/Linux 767ae437a32d644786c0779d0d54492ff9cbe574 - a74bb5f202dabddfea96abc1328fcedae8aa140a

linux/linux_kernel 6.16 rc1 (5 CPE variants)

linux/linux_kernel 6.15 - 6.15.7

Published Aug 16, 2025

Tracked Since Feb 18, 2026