CVE-2024-56431

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.85% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 77.3% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2024-12-25 00:00Z1 YR AGO

Last updated

2025-05-07 19:45Z1 YR AGO

Reserved

2024-12-24

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-863Incorrect AuthorizationClass
• CWE-1335Incorrect Bitwise Shift of IntegerBase

Data version

5.1

Document digest

ffc646f96d2ddd68e917f87e00211574caeb217d29df42a7bd06f976ec014a67

• github.comhttps://github.com/xiph/theora/issues/17#issuecomment-2480630603
• github.comhttps://github.com/xiph/theora/blob/7180717276af1ebc7da15c83162d6c5d6203aabf/lib/huffdec.c#L193
• github.comhttps://github.com/UnionTech-Software/libtheora-CVE-2024-56431-PoC
• www.openwall.comhttps://www.openwall.com/lists/oss-security/2025/04/25/6
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/04/25/4
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/04/25/6