CVE-2025-55398

Description

An issue was discovered in mouse07410 asn1c thru 0.9.29 (2025-03-20) - a fork of vlm asn1c. In UPER (Unaligned Packed Encoding Rules), asn1c-generated decoders fail to enforce INTEGER constraints when the bound is positive and exceeds 32 bits in length, potentially allowing incorrect or malicious input to be processed.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.02%
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/mouse07410/asn1c/issues/222

Frequently Asked Questions

What is the severity of CVE-2025-55398?
CVE-2025-55398 has been scored as a critical severity vulnerability.
How to fix CVE-2025-55398?
To fix CVE-2025-55398, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-55398 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-55398 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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