CVE-2024-56431
CVSS v3
9.8
CRITICAL
EPSS Score
1.8 %
exploit probability, as of 2026-10-03
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2024-12-25
Frequently asked questions
What is CVE-2024-56431?
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.
Is CVE-2024-56431 actively exploited?
Active exploitation of CVE-2024-56431 has not been confirmed. Its EPSS score was 1.8% on 2026-10-03, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2024-56431?
CVE-2024-56431 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2024-56431 affecting your environment?
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