CVE-2025-5399

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
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
curlCNA
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CVEADP
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CISA-ADPADP
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
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 17%
Debian logo
Debian Releases
Debian Product
Codename
curl
bullseye
7.74.0-1.3+deb11u13
not-affected
bookworm
7.88.1-10+deb12u12
not-affected
bullseye (security)
7.74.0-1.3+deb11u15
fixed
bookworm (security)
7.88.1-10+deb12u5
fixed
sid
8.14.1-2
fixed
trixie
8.14.1-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
curl
plucky
not-affected
oracular
not-affected
noble
not-affected
jammy
not-affected
focal
not-affected
bionic
not-affected
xenial
not-affected
trusty
not-affected