CVE-2026-77584

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-77584
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-20 21:17:10 UTC
Updated2026-08-20 21:17:10 UTC
DescriptionTor before 0.4.9.10 did not reject a CONFLUX_LINK cell that arrives on a circuit which already has attached streams. A malicious client could send a RELAY_COMMAND_BEGIN before the CONFLUX_LINK on the same circuit, attaching an exit stream that would later end up orphan leaving a dangling circuit back-pointer and a use-after-free (UAF) when the circuit is freed. This is TROVE-2026-025.

Risk And Classification

Primary CVSS: v3.1 7 HIGH from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L

Problem Types: CWE-821 | CWE-821 CWE-821 Incorrect Synchronization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
3.1CNACVSS7HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Torproject Tor affected 0.4.8.1-alpha 0.4.9.10 custom Not specified

References

ReferenceSourceLinkTags
gitlab.torproject.org/tpo/core/tor/-/raw/tor-0.4.9.10/ChangeLog [email protected] gitlab.torproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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