CVE-2026-48914
Qemu-kvm: heap buffer overflow in virtio-blk scsi request handling
Description
A flaw was found in QEMU's virtio-blk device. The issue arises because the device does not properly validate the size of input descriptors before writing data. A malicious guest with high privileges could exploit this vulnerability by submitting a malformed virtio-blk SCSI request, leading to an out-of-bounds write in the host heap memory and a potential denial of service (DoS) for the QEMU process.
INFO
Published Date :
June 12, 2026, 10:16 a.m.
Last Modified :
June 12, 2026, 10:16 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-48914
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 53f830b8-0a3f-465b-8143-3b8a9948e749 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update QEMU to the latest version.
- Apply vendor patches for virtio-blk.
- Review virtio-blk SCSI request handling.
- Limit guest access to virtio-blk.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-48914.
| URL | Resource |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-48914 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2488283 | |
| https://lore.kernel.org/qemu-devel/[email protected]/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-48914 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-48914
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-48914 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-48914 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Jun. 12, 2026
Action Type Old Value New Value Added Description A flaw was found in QEMU's virtio-blk device. The issue arises because the device does not properly validate the size of input descriptors before writing data. A malicious guest with high privileges could exploit this vulnerability by submitting a malformed virtio-blk SCSI request, leading to an out-of-bounds write in the host heap memory and a potential denial of service (DoS) for the QEMU process. Added CVSS V3.1 AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H Added CWE CWE-122 Added Reference https://access.redhat.com/security/cve/CVE-2026-48914 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2488283 Added Reference https://lore.kernel.org/qemu-devel/[email protected]/