A tor security update has been released for Debian GNU/Linux 11 and 12 to address an issue that can result in denial of service.

[SECURITY] [DSA 5562-1] tor security update

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Debian Security Advisory DSA-5562-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
November 22, 2023 https://www.debian.org/security/faq
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Package : tor
CVE ID : not yet available

It was discovered that Tor was susceptible to a crash during handshake
with a remote relay, resulting in denial of service.

For the oldstable distribution (bullseye), support for tor is now
discontinued. Please upgrade to the stable release (bullseye) to continue
receiving tor updates.

For the stable distribution (bookworm), this problem has been fixed in
version 0.4.7.16-1.

We recommend that you upgrade your tor packages.

For the detailed security status of tor please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/tor

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/