CVE-2021-34550

medium
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
5.5

Description

An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-006. The v3 onion service descriptor parsing allows out-of-bounds memory access, and a client crash, via a crafted onion service descriptor

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-34550

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-202106-50

OS impact

OSVersionStatusFixed in
arch archfixed0.4.5.9-1
debian debianbookwormfixed0.4.5.9-1
debian debianbullseyefixed0.4.5.9-1
debian debianforkyfixed0.4.5.9-1
debian debiansidfixed0.4.5.9-1
debian debiantrixiefixed0.4.5.9-1

References

Verify integrity in audit chain (admin only). AS-IS.