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.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-8a3e460f1e advisory.

    Update to latest upstream release



Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-f51af3db87 advisory.

    Update to latest upstream release



Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21660-1 advisory.

    Changes in tor:

    - Update to 0.4.9.11
      * Major bugfixes
        - onion services: Prevent a race condition (boo#1275918, CVE-2026-77638)
        - client: no longer assert and exit if an onion service encodes an           all-zero public key for one of its introduction points
        - directory authorities: Stop allowing 0 as a port in exit policy lines
        - security, conflux: Fix a use-after-free (and potential double free)           (boo#1275919, CVE-2026-77587, TROVE-2026-026)

    - Update to 0.4.9.10
      * Major bugfixes
        - conflux, security: Reject a CONFLUX_LINK cell that arrives on a circuit           which already has attached streams. (boo#1275920, CVE-2026-77584, TROVE-2026-025)
        - client: Resume warning about unsafe socks protocols when SafeSocks           is not set. Also resume warning every time when TestSocks is set.
        - Make clients more consistently expire entry guards 48 to 60 days           after they are first used.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-77587)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
366738	Fedora 43 : tor (2026-8a3e460f1e)	Nessus	Fedora Local Security Checks	Local	critical
366724	Fedora 44 : tor (2026-f51af3db87)	Nessus	Fedora Local Security Checks	Local	critical
341169	openSUSE 16 Security Update : tor (openSUSE-SU-2026:21660-1)	Nessus	SuSE Local Security Checks	Local	critical
338637	Linux Distros Unpatched Vulnerability : CVE-2026-77587	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-77587

high

Tenable Plugins

critical

critical

critical

high