CVE-2024-50383

Name: CVE-2024-50383
Creator: NVD / NIST
Published: 2024-10-23T17:15:19.54+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 0.54%

Last modified Jun 17, 2026

CVE-2024-50383 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Botan before 3.6.0, when certain GCC versions are used, has a compiler-induced secret-dependent operation in lib/utils/donna128.h in donna128 (used in Chacha-Poly1305 and x25519). An addition can be skipped if a carry is not set. EPSS estimates a 0.54% chance of exploitation in the next 30 days.

Description

Botan before 3.6.0, when certain GCC versions are used, has a compiler-induced secret-dependent operation in lib/utils/donna128.h in donna128 (used in Chacha-Poly1305 and x25519). An addition can be skipped if a carry is not set. This was observed for GCC 11.3.0 with -O2 on MIPS, and GCC on x86-i386. (Only 32-bit processors can be affected.)

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.54%

41.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-203

Affected Software

Vendor	Product	Versions
Botan Project	Botan	< 3.6.0

References

https://arxiv.org/pdf/2410.13489Exploit, Technical Description, Third Party Advisory
https://github.com/randombit/botan/commit/53b0cfde580e86b03d0d27a488b6c134f662e957Patch
https://github.com/randombit/botan/compare/3.5.0...3.6.0Product
https://news.ycombinator.com/item?id=41887153Issue Tracking

Timeline

Published: Oct 23, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2024-50383?

How severe is CVE-2024-50383?

CVE-2024-50383 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.

How do I fix CVE-2024-50383?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-50383?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST