Bug 2530532 - CVE-2026-87724 tor: Tor: Denial of Service via misinterpretation of congestion-control extension [fedora-all]
Summary: CVE-2026-87724 tor: Tor: Denial of Service via misinterpretation of congestio...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: tor
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Marcel Haerry
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["fef0e3db-6b2d-456d-af77-8...
Depends On:
Blocks: CVE-2026-87724
TreeView+ depends on / blocked
 
Reported: 2026-09-09 07:04 UTC by Vladimir Vasilev
Modified: 2026-09-09 07:04 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:

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Description Vladimir Vasilev 2026-09-09 07:04:46 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.
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