CVE-2025-5399

EUVD-2025-17371
Due to a mistake in libcurl's WebSocket code, a malicious server can send a
particularly crafted packet which makes libcurl get trapped in an endless
busy-loop.

There is no other way for the application to escape or exit this loop other
than killing the thread/process.

This might be used to DoS libcurl-using application.
Infinite Loop
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
curlCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 65%
Affected Products (NVD)
VendorProductVersion
haxxcurl
8.13.0 ≤
𝑥
< 8.14.1
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
curlcurl
𝑥
≤ 8.14.0
CNA
curlcurl
𝑥
≤ 8.13.0
CNA
Debian logo
Debian Releases
Debian Product
Codename
curl
bookworm
7.88.1-10+deb12u14
fixed
bookworm (security)
7.88.1-10+deb12u5
fixed
bullseye
7.74.0-1.3+deb11u13
fixed
bullseye (security)
7.74.0-1.3+deb11u16
fixed
forky
8.20.0-1
fixed
sid
8.20.0-2
fixed
trixie
8.14.1-2+deb13u3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
curl
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
oracular
not-affected
plucky
not-affected
trusty
not-affected
xenial
not-affected
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
curl
suse enterprise desktop 15 SP6
8.14.1-150600.4.28.1
fixed
suse enterprise desktop 15 SP7
8.14.1-150600.4.28.1
fixed
suse enterprise sap 15 SP6
8.14.1-150600.4.28.1
fixed
suse enterprise sap 15 SP7
8.14.1-150600.4.28.1
fixed
suse enterprise server 15 SP6
8.14.1-150600.4.28.1
fixed
suse enterprise server 15 SP7
8.14.1-150600.4.28.1
fixed
libcurl-devel
suse enterprise desktop 15 SP6
8.14.1-150600.4.28.1
fixed
suse enterprise desktop 15 SP7
8.14.1-150600.4.28.1
fixed
suse enterprise sap 15 SP6
8.14.1-150600.4.28.1
fixed
suse enterprise sap 15 SP7
8.14.1-150600.4.28.1
fixed
suse enterprise server 15 SP6
8.14.1-150600.4.28.1
fixed
suse enterprise server 15 SP7
8.14.1-150600.4.28.1
fixed
libcurl4
suse enterprise desktop 15 SP6
8.14.1-150600.4.28.1
fixed
suse enterprise desktop 15 SP7
8.14.1-150600.4.28.1
fixed
suse enterprise sap 15 SP6
8.14.1-150600.4.28.1
fixed
suse enterprise sap 15 SP7
8.14.1-150600.4.28.1
fixed
suse enterprise server 15 SP6
8.14.1-150600.4.28.1
fixed
suse enterprise server 15 SP7
8.14.1-150600.4.28.1
fixed
libcurl4-32bit
suse enterprise desktop 15 SP6
8.14.1-150600.4.28.1
fixed
suse enterprise desktop 15 SP7
8.14.1-150600.4.28.1
fixed
suse enterprise sap 15 SP6
8.14.1-150600.4.28.1
fixed
suse enterprise sap 15 SP7
8.14.1-150600.4.28.1
fixed
suse enterprise server 15 SP6
8.14.1-150600.4.28.1
fixed
suse enterprise server 15 SP7
8.14.1-150600.4.28.1
fixed
Common Weakness Enumeration
References
https://curl.se/docs/CVE-2025-5399.html
https://curl.se/docs/CVE-2025-5399.json
https://hackerone.com/reports/3168039
http://www.openwall.com/lists/oss-security/2025/06/04/2