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Vulnerability details: VCID-ch4q-bmr1-pff5
Vulnerability ID VCID-ch4q-bmr1-pff5
Aliases CVE-2025-5399
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.0
Risk 3.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
System Score Found at
cvssv3 4.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-5399.json
epss 0.00017 https://api.first.org/data/v1/epss?cve=CVE-2025-5399
epss 0.00017 https://api.first.org/data/v1/epss?cve=CVE-2025-5399
epss 0.00017 https://api.first.org/data/v1/epss?cve=CVE-2025-5399
epss 0.00038 https://api.first.org/data/v1/epss?cve=CVE-2025-5399
epss 0.00039 https://api.first.org/data/v1/epss?cve=CVE-2025-5399
epss 0.00039 https://api.first.org/data/v1/epss?cve=CVE-2025-5399
epss 0.0005 https://api.first.org/data/v1/epss?cve=CVE-2025-5399
epss 0.0005 https://api.first.org/data/v1/epss?cve=CVE-2025-5399
epss 0.0005 https://api.first.org/data/v1/epss?cve=CVE-2025-5399
cvssv3.1 7.5 https://curl.se/docs/CVE-2025-5399.html
cvssv3.1 Low https://curl.se/docs/CVE-2025-5399.html
ssvc Track https://curl.se/docs/CVE-2025-5399.html
cvssv3.1 7.5 https://curl.se/docs/CVE-2025-5399.json
ssvc Track https://curl.se/docs/CVE-2025-5399.json
cvssv3.1 6.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 7.5 https://hackerone.com/reports/3168039
ssvc Track https://hackerone.com/reports/3168039
archlinux Low https://security.archlinux.org/AVG-2895
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-5399.json
https://api.first.org/data/v1/epss?cve=CVE-2025-5399
https://curl.se/docs/CVE-2025-5399.html
https://curl.se/docs/CVE-2025-5399.json
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://hackerone.com/reports/3168039
http://www.openwall.com/lists/oss-security/2025/06/04/2
2370920 https://bugzilla.redhat.com/show_bug.cgi?id=2370920
ASA-202506-2 https://security.archlinux.org/ASA-202506-2
AVG-2895 https://security.archlinux.org/AVG-2895
CVE-2025-5399 https://nvd.nist.gov/vuln/detail/CVE-2025-5399
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-5399.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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none

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none

required

unchanged

changed

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://curl.se/docs/CVE-2025-5399.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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none

required

unchanged

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none

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Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-06-09T13:20:18Z/ Found at https://curl.se/docs/CVE-2025-5399.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://curl.se/docs/CVE-2025-5399.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

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low

none

high

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none
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-06-09T13:20:18Z/ Found at https://curl.se/docs/CVE-2025-5399.json
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://hackerone.com/reports/3168039
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-06-09T13:20:18Z/ Found at https://hackerone.com/reports/3168039
Exploit Prediction Scoring System (EPSS)
Percentile 0.02531
EPSS Score 0.00017
Published At June 7, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-06-02T21:46:50.443295+00:00 SUSE Severity Score Importer Import https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml 36.1.2