CVE-2024-0340

Kernel: information disclosure in vhost/vhost.c:vhost_new_msg()

MEDIUM
5.5
CVSS Score
Published: January 9, 2024 at 05:36 PM UTC
Updated: October 29, 2026 at 08:16 AM UTC
2 products affected across 2 vendorsLinux KernelEnterprise Linux

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

A vulnerability was found in vhost_new_msg in drivers/vhost/vhost.c in the Linux kernel, which does not properly initialize memory in messages passed between virtual guests and the host operating system in the vhost/vhost.c:vhost_new_msg() function. This issue can allow local privileged users to read some kernel memory contents when reading from the /dev/vhost-net device file.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
All versions6
Vendor states this is fixed in 0:4.18.0-553.5.1.el8_10 (unaffected)
Vendor states this is fixed in 0:4.18.0-553.5.1.rt7.346.el8_10 (unaffected)
Vendor states this is fixed in 0:5.14.0-427.68.1.el9_4 (unaffected)
Vendor states this is fixed in 0:5.14.0-503.11.1.el9_5 (unaffected)

References (9)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200NVD-CWE-noinfo

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