CVE catalog
CVE-2025-4444
tor affected and fixed versions
A security flaw has been discovered in Tor up to 0.4.7.16/0.4.8.17. Impacted is an unknown function of the component Onion Service Descriptor Handler. Performing manipulation results in resource consumption. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is considered difficult. Upgrading to version 0.4.8.18 and 0.4.9.3-alpha is recommended to address this issue. It is recommended to upgrade the affected component.
- Severity
- Medium · CVSS 6.3
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.47% · Oct 27, 2026
Projects and upstream resources
Reported versions and fixes
Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.
Version impact has not been established. The original provider fields are retained below.
Provider details and historical evidence
Original provider fields
{
"package_releases": [
{
"name": "tor",
"status": "fixed",
"release": "sid",
"version": "0.4.9.15-1"
},
{
"name": "tor",
"status": "fixed",
"release": "forky",
"version": "0.4.9.14-1"
},
{
"name": "tor",
"status": "fixed",
"release": "trixie",
"version": "0.4.9.11-0+deb13u1"
},
{
"name": "tor",
"status": "fixed",
"release": "trixie-security",
"version": "0.4.9.14-0+deb13u1"
},
{
"name": "tor",
"status": "fixed",
"release": "bookworm",
"version": "0.4.9.11-0+deb12u1"
},
{
"name": "tor",
"status": "fixed",
"release": "bookworm-security",
"version": "0.4.9.11-0+deb12u1"
}
],
"fixed_versions": [
{
"bug": 1115744,
"name": "tor",
"type": "source",
"origin": null,
"release": "sid",
"urgency": "not yet assigned",
"fixed_version": "0.4.8.21-1"
},
{
"bug": 1115744,
"name": "tor",
"type": "source",
"origin": null,
"release": "forky",
"urgency": "not yet assigned",
"fixed_version": "0.4.8.21-1"
},
{
"bug": 1115744,
"name": "tor",
"type": "source",
"origin": null,
"release": "trixie",
"urgency": "not yet assigned",
"fixed_version": "0.4.9.6-0+deb13u1"
},
{
"bug": 1115744,
"name": "tor",
"type": "source",
"origin": null,
"release": "bookworm",
"urgency": "not yet assigned",
"fixed_version": "0.4.9.6-0+deb12u1"
}
],
"distribution_packages": [
{
"name": "tor",
"distro": "opensuse",
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.4.8.18-1.1"
}
]
}
],
"release": "tumbleweed",
"versions": [],
"ecosystem": "rpm",
"fixed_version": "0.4.8.18-1.1",
"provider_record_id": "OPENSUSE-SU-2025:15571-1"
}
]
}OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [tor]Unknown
Details (6)
0.4.9.11-0+deb12u1· amd64 · bookwormFixed · Fixed:
0.4.9.6-0+deb12u1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.9.11-0+deb12u1· arm64 · bookwormFixed · Fixed:
0.4.9.6-0+deb12u1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.8.14-1~bpo12+1· amd64 · bookworm-backportsAffected · Fixed:
0.4.9.6-0+deb12u1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.8.14-1~bpo12+1· arm64 · bookworm-backportsAffected · Fixed:
0.4.9.6-0+deb12u1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.9.11-0+deb12u1· amd64 · bookworm-securityFixed · Fixed:
0.4.9.6-0+deb12u1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.9.11-0+deb12u1· arm64 · bookworm-securityFixed · Fixed:
0.4.9.6-0+deb12u1dsa · tor · debian · bookworm; dsa · tor · debian · 12
- [tor-geoipdb]Unknown
Source package: [tor]
Details (6)
0.4.9.11-0+deb12u1· all · bookwormFixed · Fixed:
0.4.9.6-0+deb12u1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.9.11-0+deb12u1· all · bookwormFixed · Fixed:
0.4.9.6-0+deb12u1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.8.14-1~bpo12+1· all · bookworm-backportsAffected · Fixed:
0.4.9.6-0+deb12u1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.8.14-1~bpo12+1· all · bookworm-backportsAffected · Fixed:
0.4.9.6-0+deb12u1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.9.11-0+deb12u1· all · bookworm-securityFixed · Fixed:
0.4.9.6-0+deb12u1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.9.11-0+deb12u1· all · bookworm-securityFixed · Fixed:
0.4.9.6-0+deb12u1dsa · tor · debian · bookworm; dsa · tor · debian · 12
[Debian 13 (Trixie)]
- [tor]Unknown
Details (10)
0.4.9.11-0+deb13u1· amd64 · trixieFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.11-0+deb13u1· arm64 · trixieFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.11-1~bpo13+1· amd64 · trixie-backportsFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.11-1~bpo13+1· arm64 · trixie-backportsFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.11-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.11-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.12-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.12-0+deb13u2· amd64 · trixie-security · Historical versionFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.13-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.14-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
- [tor-geoipdb]Unknown
Source package: [tor]
Details (10)
0.4.9.11-0+deb13u1· all · trixieFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.11-0+deb13u1· all · trixieFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.11-1~bpo13+1· all · trixie-backportsFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.11-1~bpo13+1· all · trixie-backportsFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.11-0+deb13u1· all · trixie-security · Historical versionFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.11-0+deb13u1· all · trixie-securityFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.12-0+deb13u1· all · trixie-security · Historical versionFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.12-0+deb13u2· all · trixie-security · Historical versionFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.13-0+deb13u1· all · trixie-security · Historical versionFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
0.4.9.14-0+deb13u1· all · trixie-securityFixed · Fixed:
0.4.9.6-0+deb13u1dsa · tor · debian · 13
[openSUSE Tumbleweed]
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2025_15571-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2025-4444]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-4444]
- [https://osv.dev/vulnerability/openSUSE-SU-2025:15571-1]
- [https://security-tracker.debian.org/tracker/CVE-2025-4444]
- [https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-4444.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-2089.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]