CVE & CISA-KEV CatalogNVD
CVE-2024-56431
CRITICALEPSS 75th pctl9.8
CVSS v3
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.
CVSS v3 Vector
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
1.79%probability of exploitation in 30 days
75thpercentile
Elevated risk: more likely to be exploited than 75% of all known CVEs.
References
- https://github.com/UnionTech-Software/libtheora-CVE-2024-56431-PoC
- https://github.com/xiph/theora/blob/7180717276af1ebc7da15c83162d6c5d6203aabf/lib/huffdec.c#L193
- https://github.com/xiph/theora/issues/17#issuecomment-2480630603
- 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
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-04-25.