5.1

CVE-2026-2243: Qemu-kvm: heap buffer out-of-bounds read in vmdk compressed grain parsing

Deferred
AliasesUBUNTU-CVE-2026-2243DEBIAN-CVE-2026-2243
Published 19-02-2026Last modified 31-08-2026

Vulnerability summary

CVE-2026-2243 is a medium (CVSS 5.1) Out-of-bounds Read vulnerability in qemu. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.1, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.1/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 9
OPENSUSE-SU-2026:10395-1OPENSUSE-SU-2026:20567-1SUSE-SU-2026:21235-1SUSE-SU-2026:2385-1SUSE-SU-2026:2386-1SUSE-SU-2026:2388-1

Timeline

  1. 19-02-2026
    PublishedVulnerability first disclosed.
  2. 31-08-2026
    Last modifiedVulnerability information updated.

Description

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).

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.12% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu2 products
  • qemu< 2.0.0+dfsg-2ubuntu1.47+esm6 | < 1:2.5+dfsg-5ubuntu10.51+esm4 | < 1:2.11+dfsg-1ubuntu7.42+esm5 | < 1:4.2-3ubuntu6.30+esm1 | < 1:6.2+dfsg-2ubuntu6.30 | < 1:8.2.2+ds-0ubuntu1.16 | < 1:10.1.0+ds-5ubuntu2.6 | All versions (No fix recorded)
  • qemu-hweAll versions (No fix recorded)
Debian1 product
  • qemuAll versions (No fix recorded) | < 1:10.0.10+ds-0+deb13u1 | < 1:10.2.2+ds-1

2 vendors · 3 products

References

8 links