Bug 2521979 - CVE-2026-77587 tor: Tor: Denial of Service via use-after-free vulnerability [fedora-all]
Summary: CVE-2026-77587 tor: Tor: Denial of Service via use-after-free vulnerability [...
Keywords:
Status: ON_QA
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": ["c7e48dbe-888f-417f-8f0b-1...
Depends On:
Blocks: CVE-2026-77587
TreeView+ depends on / blocked
 
Reported: 2026-08-24 14:44 UTC by Vladimir Vasilev
Modified: 2026-10-09 02:55 UTC (History)
4 users (show)

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


Attachments (Terms of Use)

Description Vladimir Vasilev 2026-08-24 14:44:09 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 0.4.9.11 is prone to a use-after-free (and potential double free) of a conflux object when a recovery leg revives a conflux set whose last linked leg has already been closed. A malicious exit node could use this to crash a client. This is TROVE-2026-026.

Comment 1 Fedora Update System 2026-10-08 13:41:54 UTC
FEDORA-2026-bfe95c54ee (tor-0.4.9.14-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-bfe95c54ee

Comment 2 Fedora Update System 2026-10-08 13:41:59 UTC
FEDORA-2026-f51af3db87 (tor-0.4.9.14-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-f51af3db87

Comment 3 Fedora Update System 2026-10-08 13:42:02 UTC
FEDORA-2026-8a3e460f1e (tor-0.4.9.14-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-8a3e460f1e

Comment 4 Fedora Update System 2026-10-09 02:08:42 UTC
FEDORA-2026-bfe95c54ee has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-bfe95c54ee`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-bfe95c54ee

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-10-09 02:30:37 UTC
FEDORA-2026-f51af3db87 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-f51af3db87`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-f51af3db87

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2026-10-09 02:55:32 UTC
FEDORA-2026-8a3e460f1e has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-8a3e460f1e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-8a3e460f1e

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.


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