CVE-2024-56431

Public Exploit

Description

oc_huff_tree_unpack in huffdec.c in libtheora in Theora through 1.0 7180717 has an invalid negative left shift. NOTE: this is disputed by third parties because there is no evidence of a security impact, e.g., an application would not crash.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 5.99% Top 10%
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/xiph/theora/issues/17#issuecomment-2480630603 issue tracking
https://github.com/xiph/theora/blob/7180717276af1ebc7da15c83162d6c5d6203aabf/lib/huffdec.c#L193 product
https://github.com/UnionTech-Software/libtheora-CVE-2024-56431-PoC exploit
https://www.openwall.com/lists/oss-security/2025/04/25/6
http://www.openwall.com/lists/oss-security/2025/04/25/4
http://www.openwall.com/lists/oss-security/2025/04/25/6

Frequently Asked Questions

What is the severity of CVE-2024-56431?
CVE-2024-56431 has been scored as a critical severity vulnerability.
How to fix CVE-2024-56431?
To fix CVE-2024-56431, 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-2024-56431 being actively exploited in the wild?
It is possible that CVE-2024-56431 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~6% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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