In the Mullvad VPN client 2024.6 (Desktop), 2024.8 (iOS), and 2024.8-beta1 (Android), the exception-handling alternate stack can be exhaust…

published 2024-12-11 22 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-52840

cvss: 9.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits: 0; none known

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.

Patch / fix

links 1

github.com/mullvad/mullvadvpn-app@ef6c862 commit

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 22 mo ago (2024-12-12)

Exploit prediction

1.30% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.0	CVSS:3.1/AC:H/AV:N/A:H/C:H/I:H/PR:N/S:C/UI:N
CNA	3.1	9.0	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Classification

Weakness

CWE-787 Out-of-bounds Write

References

Sources

CVE List CVE-2024-55884
NVD CVE-2024-55884

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary