VulnerabilityModified
CVE-2024-56431
NOTE: this is disputed by third parties because there is no evidence of a security impact, e.g., an application would not crash.
CRITICAL 9.8EPSS 1.85%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.85%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a 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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.85% probability · 78th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Affected
- xiph/theora
- Source
- cve@mitre.org
References
- https://github.com/UnionTech-Software/libtheora-CVE-2024-56431-PoCExploit
- https://github.com/xiph/theora/blob/7180717276af1ebc7da15c83162d6c5d6203aabf/lib/huffdec.c#L193Product
- https://github.com/xiph/theora/issues/17#issuecomment-2480630603Issue Tracking
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.