Description
Tor before 0.4.9.7, when circuit queue memory pressure exists, can experience a client crash because of a double close of a circuit, aka TROVE-2026-009.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| torproject | Tor | < 0.4.9.7 | 0.4.9.7 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | tor | 0.4.9.8-1 | — |
| Debian 13 | tor | 0.4.9.8-0+deb13u1 | — |
| Debian 12 | tor | 0.4.9.8-0+deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | tor | No fix yet | — |
| Ubuntu 26.04 LTS | tor | No fix yet | — |
| Ubuntu 25.10 | tor | No fix yet | — |
| Ubuntu 24.04 LTS | tor | No fix yet | — |
| Ubuntu 22.04 LTS | tor | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | tor | No fix yet | — |
| Ubuntu Pro 18.04 LTS | tor | No fix yet | — |
| Ubuntu Pro 16.04 LTS | tor | No fix yet | — |
| Ubuntu Pro 14.04 LTS | tor | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tor | 0.4.9.8-1.1 | openSUSE-SU-2026:10735-1 |
Advisories 2
- WID-SEC-2026-1398 Tor: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 12, 2026
- openSUSE-SU-2026:10735-1 tor-0.4.9.8-1.1 on GA media SUSE / openSUSE Security Updates · May 9, 2026