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

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).

Published: 2026-02-19 Last update: 2026-04-15 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-2243 is rated Low Risk (21.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.01%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-2243

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-20 — 0.01% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-2243

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.1 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.5 2.5 [email protected]

Weakness enumeration for CVE-2026-2243

OS Trackers for CVE-2026-2243

vendor priority summary link
debian not yet assigned CVE-2026-2243 not yet assigned priority: Debian including 1 source packages (qemu), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. https://security-tracker.debian.org/tracker/CVE-2026-2243
redhat low — https://access.redhat.com/security/cve/CVE-2026-2243
suse medium CVE-2026-2243 severity moderate: SUSE including 56 source package names (qemu-10.2.2-1.1, qemu-SLOF-10.2.2-1.1, …), 56 product×package rows across 1 product lines (openSUSE Tumbleweed): Fixed 56. https://www.suse.com/security/cve/CVE-2026-2243/
ubuntu medium CVE-2026-2243 medium priority: Ubuntu including 1 source packages (qemu), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): needs-triage 4, released 4. https://ubuntu.com/security/CVE-2026-2243

Affected software / configurations for CVE-2026-2243

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-2243

cvelogic Threat Intelligence