The Qualys Research Labs discovered that an attacker-controlled allocation using the alloca() function could result in memory corruption, allowing to crash systemd and hence the entire operating system. Details can be found in the Qualys advisory at www.qualys.com/2021/07/20/cve-2021-33910/denial-of-service-systemd.txt For the stable distribution (buster), this problem has been fixed in version 241-7~deb10u8. We recommend that you upgrade your systemd packages. For the detailed security status of systemd please refer to its security tracker page at: security-tracker.debian.org/tracker/systemd
Vulmon