This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-87724 →

DEBIAN-CVE-2026-87724

Tor before 0.4.9.12 interprets the CC_RESPONSE extension even when CC_REQUEST was not sent, which allows remote attackers to cause a denial of service...

Original description

The description as published by the source.

Tor before 0.4.9.12 interprets the CC_RESPONSE extension even when CC_REQUEST was not sent, which allows remote attackers to cause a denial of service (crash) because of corrupted congestion-control state. This is TROVE-2026-032.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 tor

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 tor

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.9.12-0+deb13u2"}]}]

Debian:14 tor

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.9.12-2"}]}]

References

advisory security-tracker.debian.org