VDB-346915 · CVE-2026-2243 · Nessus 299617

QEMU VMDK Compressed Grain Parsing out-of-bounds

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.3	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in QEMU. This affects an unknown function of the component VMDK Compressed Grain Parsing. This manipulation causes out-of-bounds. This vulnerability is registered as CVE-2026-2243. No exploit is available.

Detailsinfo

A vulnerability classified as problematic was found in QEMU (affected version not known). Affected by this vulnerability is some unknown functionality of the component VMDK Compressed Grain Parsing. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. The summary by CVE is:

A flaw was found in QEMU. A specially crafted VMDK image could trigger an out-of-bounds read vulnerability, potentially leading to a 12-byte leak of sensitive information or a denial of service condition (DoS).

It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2026-2243. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/22/2026).

The vulnerability scanner Nessus provides a plugin with the ID 299617 (Linux Distros Unpatched Vulnerability : CVE-2026-2243), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (299617) and CERT Bund (WID-SEC-2026-0464). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

Open Source QEMU

Productinfo

Type

Virtualization Software

Name

QEMU

License

open-source

Website

Product: https://www.qemu.org/

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.5
VulDB Temp Score: 3.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.1
CNA Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 299617
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-2243

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/19/2026 Advisory disclosed
02/19/2026 +0 days VulDB entry created
02/22/2026 +3 days VulDB entry last update

Sourcesinfo

Product: qemu.org

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2026-2243 (🔒)
GCVE (CVE): GCVE-0-2026-2243
GCVE (VulDB): GCVE-100-346915
CERT Bund: WID-SEC-2026-0464 - QEMU: Schwachstelle ermöglicht Denial of Service und die Offenlegung von Informationen

Entryinfo

Created: 02/19/2026 16:05
Updated: 02/22/2026 04:25
Changes: 02/19/2026 16:05 (49), 02/20/2026 07:05 (2), 02/21/2026 03:22 (7), 02/22/2026 04:25 (12)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.