CVE-2024-55884

Severity: critical (CVSS 9.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-12-12 · updated 2026-06-17
Weakness: CWE-787

Description

In the Mullvad VPN client 2024.6 (Desktop), 2024.8 (iOS), and 2024.8-beta1 (Android), the exception-handling alternate stack can be exhausted, leading to heap-based out-of-bounds writes in enable() in exception_logging/unix.rs, aka MLLVD-CR-24-01. NOTE: achieving code execution is considered non-trivial.

References

https://github.com/mullvad/mullvadvpn-app/commit/ef6c862071b26023802b00d6e1dc6ca53d1ab3e6
https://news.ycombinator.com/item?id=42390768
https://x41-dsec.de/news/2024/12/11/mullvad/

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