CVE-2024-7409 | Qemu: denial of service via improper synchronization in qemu nbd server during socket closure

A flaw was found in the QEMU NBD Server. This vulnerability allows a denial of service (DoS) attack via improper synchronization during socket closure when a client keeps a socket open as the server is taken offline.

Published: 2024-08-05 Last update: 2026-04-15 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-7409 is rated Moderate Risk (50.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.03%). Review affected assets and schedule remediation.

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-2024-7409

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 2026-06-15 1.59% 1.03% -0.57%
2 2026-06-12 1.85% 1.59% -0.26%
3 2026-05-26 — 1.85% —

Full EPSS history (30 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-7409

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2024-7409

OS Trackers for CVE-2024-7409

vendor priority summary link
debian not yet assigned CVE-2024-7409 not yet assigned priority: Debian including 1 source packages (qemu), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-7409
redhat medium — https://access.redhat.com/security/cve/CVE-2024-7409
suse high CVE-2024-7409 severity important: SUSE including 759 source package names (2.0.4-3.5.221:qemu-guest-agent-7.1.0-150500.49.24.1, 2.1.3-4.11:qemu-guest-agent-8.2.7-1.1, …), 1416 product×package rows across 55 product lines (Container bci/kiwi, Container suse/sl-micro/6.0/kvm-os-container, … (55 product lines)): Fixed 1112, Known Affected 231, Known Not Affected 73. https://www.suse.com/security/cve/CVE-2024-7409/
ubuntu medium CVE-2024-7409 medium priority: Ubuntu including 1 source packages (qemu), 10 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): released 6, needed 4. https://ubuntu.com/security/CVE-2024-7409

Affected software / configurations for CVE-2024-7409

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2024-7409

cvelogic Threat Intelligence