CVE-2025-38074

MEDIUM EPSS 5.7%

Published Jun 18, 20251y ago · Modified Jun 17, 20262w ago

5.5 CVSS 3.1

Medium

Published Jun 18, 2025 1y ago

Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: vhost-scsi: protect vq->log_used with vq->mutex The vhost-scsi completion path may access vq->log_base when vq->log_used is already set to false. vhost-thread QEMU-thread vhost_scsi_complete_cmd_work() -> vhost_add_used() -> vhost_add_used_n() if (unlikely(vq->log_used)) QEMU disables vq->log_used via VHOST_SET_VRING_ADDR. mutex_lock(&vq->mutex); vq->log_used = false now! mutex_unlock(&vq->mutex); QEMU gfree(vq->log_base) log_used() -> log_write(vq->log_base) Assuming the VMM is QEMU. The vq->log_base is from QEMU userpace and can be reclaimed via gfree(). As a result, this causes invalid memory writes to QEMU userspace. The control queue path has the same issue.

CVSS Details

Base Score

5.5

Exploitability

1.8

Impact

3.6

Vector string

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

Attack Vector Local

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Unchanged

Confidentiality None

Integrity None

Availability High

Threat Intelligence

EPSS Exploit Probability

5.7% percentile

Exploit & Patch Status

No Known Exploit

Patch Available

Affected Products 10

Vendor	Product	Version	Range
linux	linux_kernel	*	<5.10.240
linux	linux_kernel	*	≥5.11 – <5.15.189
linux	linux_kernel	*	≥5.16 – <6.1.146
linux	linux_kernel	*	≥6.2 – <6.6.93
linux	linux_kernel	*	≥6.7 – <6.12.31
linux	linux_kernel	*	≥6.13 – <6.14.9
linux	linux_kernel	6.15	any
linux	linux_kernel	6.15	any
linux	linux_kernel	6.15	any
debian	debian_linux	11.0	any

References 9

git.kernel.org https://git.kernel.org/stable/c/59614c5acf6688f7af3c245d359082c0e9e53117

Patch
git.kernel.org https://git.kernel.org/stable/c/80cf68489681c165ded460930e391b1eb37b5f6f

Patch
git.kernel.org https://git.kernel.org/stable/c/8312a1ccff1566f375191a89b9ba71b6eb48a8cd

Patch
git.kernel.org https://git.kernel.org/stable/c/bd8c9404e44adb9f6219c09b3409a61ab7ce3427

Patch
git.kernel.org https://git.kernel.org/stable/c/c0039e3afda29be469d29b3013d7f9bdee136834

Patch
git.kernel.org https://git.kernel.org/stable/c/ca85c2d0db5f8309832be45858b960d933c2131c

Patch
git.kernel.org https://git.kernel.org/stable/c/f591cf9fce724e5075cc67488c43c6e39e8cbe27

Patch
lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html

Third Party Advisory
lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html

Third Party Advisory

Remediation

git.kernel.org https://git.kernel.org/stable/c/59614c5acf6688f7af3c245d359082c0e9e53117

Patch
git.kernel.org https://git.kernel.org/stable/c/80cf68489681c165ded460930e391b1eb37b5f6f

Patch
git.kernel.org https://git.kernel.org/stable/c/8312a1ccff1566f375191a89b9ba71b6eb48a8cd

Patch
git.kernel.org https://git.kernel.org/stable/c/bd8c9404e44adb9f6219c09b3409a61ab7ce3427

Patch
git.kernel.org https://git.kernel.org/stable/c/c0039e3afda29be469d29b3013d7f9bdee136834

Patch
git.kernel.org https://git.kernel.org/stable/c/ca85c2d0db5f8309832be45858b960d933c2131c

Patch
git.kernel.org https://git.kernel.org/stable/c/f591cf9fce724e5075cc67488c43c6e39e8cbe27

Patch