CVE-2026-77587
published 2026-08-20CVE-2026-77587: 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…
PriorityP339high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.40%
33.6th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| torproject | tor | < 0.4.9.11 | 0.4.9.11 |
| torproject | tor | >= 0.4.8.1-alpha < 0.4.9.11 | 0.4.9.11 |
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Bugzilla
CVE-2026-77587 tor: Tor: Denial of Service via use-after-free vulnerability [fedora-all]
bugzilla·2026-08-24·CVSS 5.9
CVE-2026-77587 [MEDIUM] CVE-2026-77587 tor: Tor: Denial of Service via use-after-free vulnerability [fedora-all]
CVE-2026-77587 tor: Tor: Denial of Service via use-after-free vulnerability [fedora-all]
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.
Bugzilla
CVE-2026-77587 tor: Tor: Denial of Service via use-after-free vulnerability [epel-all]
bugzilla·2026-08-24·CVSS 5.9
CVE-2026-77587 [MEDIUM] CVE-2026-77587 tor: Tor: Denial of Service via use-after-free vulnerability [epel-all]
CVE-2026-77587 tor: Tor: Denial of Service via use-after-free vulnerability [epel-all]
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.
Bugzilla
CVE-2026-77587 Tor: Tor: Denial of Service via use-after-free vulnerability
bugzilla·2026-08-20·CVSS 5.9
CVE-2026-77587 [MEDIUM] CVE-2026-77587 Tor: Tor: Denial of Service via use-after-free vulnerability
CVE-2026-77587 Tor: Tor: Denial of Service via use-after-free vulnerability
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.
2026-08-20
Published