CVE-2025-38074
Analyzed Analyzed - Analysis Complete
BaseFortify

Publication date: 2025-06-18

Last updated on: 2025-12-17

Assigner: kernel.org

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 Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-06-18
Last Modified
2025-12-17
Generated
2026-05-07
AI Q&A
2025-06-18
EPSS Evaluated
2026-05-05
NVD
CVE-2025-38074
Affected Vendors & Products
Showing 10 associated CPEs
Vendor Product Version / Range
linux linux_kernel to 5.10.240 (exc)
linux linux_kernel From 5.11 (inc) to 5.15.189 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.146 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.93 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.31 (exc)
linux linux_kernel From 6.13 (inc) to 6.14.9 (exc)
linux linux_kernel 6.15
linux linux_kernel 6.15
linux linux_kernel 6.15
debian debian_linux 11.0
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-NVD-CWE-noinfo
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability in the Linux kernel's vhost-scsi component involves improper protection of the vq->log_used variable with the vq->mutex. The issue arises because the vhost-scsi completion path may access vq->log_base after vq->log_used has been set to false without proper synchronization. Since vq->log_base is memory from QEMU userspace that can be freed (reclaimed) via gfree(), this leads to invalid memory writes to QEMU userspace, potentially causing memory corruption or crashes.


How can this vulnerability impact me? :

This vulnerability can cause invalid memory writes to QEMU userspace, which may lead to memory corruption, crashes, or potentially allow an attacker to execute arbitrary code or cause denial of service within the virtual machine environment that uses vhost-scsi with QEMU.


Ask Our AI Assistant
Need more information? Ask your question to get an AI reply (Powered by our expertise)
0/70
EPSS Chart