Description
Tor before 0.4.3.6 has an out-of-bounds memory access that allows a remote denial-of-service (crash) attack against Tor instances built to use Mozilla Network Security Services (NSS), aka TROVE-2020-001.
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 | 0.4.3.6-1 | — |
| Debian 13 | tor | 0.4.3.6-1 | — |
| Debian 12 | tor | 0.4.3.6-1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP2 | tor | 0.4.4.6-bp152.2.3.1 | openSUSE-SU-2020:1970-1 |
| SUSE Package Hub 15 SP1 | tor | 0.4.4.6-bp152.2.3.1 | openSUSE-SU-2020:1970-1 |
| SUSE Package Hub 12 | tor | 0.4.4.6-bp152.2.3.1 | openSUSE-SU-2020:1970-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tor | 0.4.6.7-2.2 | openSUSE-SU-2024:11469-1 |
| openSUSE Leap 15.2 | tor | 0.4.4.6-bp152.2.3.1 | openSUSE-SU-2020:1970-1 |
| openSUSE Leap 15.1 | tor | 0.4.4.6-bp152.2.3.1 | openSUSE-SU-2020:1970-1 |
Advisories 2
- openSUSE-SU-2024:11469-1 tor-0.4.6.7-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1970-1 Security update for tor SUSE / openSUSE Security Updates · Feb 4, 2026