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CVE-2024-56431

CVE-2024-56431

CVSS 9.8 CRITICALEPSS 1.8%CWE-863
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
n/a · n/a
public PoCs found — 1
githubgithub.com/UnionTech-Software/libtheora-CVE-2024-56431-PoC★ 1
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References
https://github.com/UnionTech-Software/libtheora-CVE-2024-56431-PoChttps://github.com/xiph/theora/blob/7180717276af1ebc7da15c83162d6c5d6203aabf/lib/huffdec.c#L193https://github.com/xiph/theora/issues/17#issuecomment-2480630603https://www.openwall.com/lists/oss-security/2025/04/25/6http://www.openwall.com/lists/oss-security/2025/04/25/4http://www.openwall.com/lists/oss-security/2025/04/25/6