CVE-2024-56431

CVSS 9.8 CRITICALEPSS 1.8%CWE-863

Vexday Risk Score

48Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 9.8EPSS 1.8%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

25 Dec 2024Published on NVD

25 Dec 2024Public PoC

Recommendation: Plan a near-term fix — a public PoC already exists.

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-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