CVE-2024-34161 | NGINX HTTP/3 QUIC vulnerability

When NGINX Plus or NGINX OSS are configured to use the HTTP/3 QUIC module and the network infrastructure supports a Maximum Transmission Unit (MTU) of 4096 or greater without fragmentation, undisclosed QUIC packets can cause NGINX worker processes to leak previously freed memory.

Published: 2024-05-29 Last update: 2025-01-24 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-34161 is rated Moderate Risk (40.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.87%). 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-2024-34161

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 0.72% 0.87% +0.15%
2 2026-03-04 0.35% 0.72% +0.37%
3 2026-03-01 — 0.35% —

Full EPSS history (27 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-34161

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N 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: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:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N 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: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:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2024-34161

OS Trackers for CVE-2024-34161

vendor priority summary link
debian unimportant CVE-2024-34161 unimportant priority: Debian including 1 source packages (nginx), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-34161
redhat medium — https://access.redhat.com/security/cve/CVE-2024-34161
suse medium CVE-2024-34161 severity moderate: SUSE including 2 source package names (nginx, nginx-source), 39 product×package rows across 20 product lines (SUSE Enterprise Storage 7.1, SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS, … (20 product lines)): Known Not Affected 39. https://www.suse.com/security/cve/CVE-2024-34161/
ubuntu medium CVE-2024-34161 medium priority: Ubuntu including 1 source packages (nginx), 8 status rows across 8 suites (bionic, focal, jammy, mantic, noble, trusty, upstream, xenial): not-affected 7, needs-triage 1. https://ubuntu.com/security/CVE-2024-34161

Affected software / configurations for CVE-2024-34161

Vendor Product Version Raw CPE
f5 nginx_open_source >= 1.25.0, < 1.26.1 cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*
f5 nginx_plus r30 cpe:2.3:a:f5:nginx_plus:r30:-:*:*:*:*:*:*
f5 nginx_plus r30 cpe:2.3:a:f5:nginx_plus:r30:p1:*:*:*:*:*:*
f5 nginx_plus r30 cpe:2.3:a:f5:nginx_plus:r30:p2:*:*:*:*:*:*
f5 nginx_plus r31 cpe:2.3:a:f5:nginx_plus:r31:-:*:*:*:*:*:*
f5 nginx_plus r31 cpe:2.3:a:f5:nginx_plus:r31:p1:*:*:*:*:*:*
fedoraproject fedora 39 cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
fedoraproject fedora 40 cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:*

References for CVE-2024-34161

cvelogic Threat Intelligence