CVE-2026-54240: CWE-190: Integer Overflow or Wraparound in strukturag libde265
libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.1.1 use signed 32-bit arithmetic to calculate pixel offsets, allowing a crafted HEVC stream with large image dimensions to trigger an integer overflow and cause out-of-bounds heap reads or writes, potentially disclosing data, corrupting memory, or crashing the decoder. Version 1.1.1 contains a patch.
AI Analysis
Technical Summary
libde265 versions before 1.1.1 perform pixel offset calculations using signed 32-bit arithmetic. A crafted HEVC stream with large image dimensions can trigger an integer overflow or wraparound, resulting in out-of-bounds heap memory access. This vulnerability can cause information disclosure, memory corruption, or denial of service via decoder crashes. The vulnerability is tracked as CVE-2026-54240 and is addressed in libde265 version 1.1.1.
Potential Impact
Exploitation of this vulnerability can lead to high impact outcomes including disclosure of sensitive data, corruption of memory, and denial of service due to application crashes. The CVSS v3.1 base score is 7.4 (High), reflecting network attack vector with high impact on confidentiality and availability, and requiring high attack complexity.
Mitigation Recommendations
Users should upgrade libde265 to version 1.1.1 or later, where the integer overflow issue has been patched. No other mitigations are indicated or required according to the available data.
CVE-2026-54240: CWE-190: Integer Overflow or Wraparound in strukturag libde265
Description
libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.1.1 use signed 32-bit arithmetic to calculate pixel offsets, allowing a crafted HEVC stream with large image dimensions to trigger an integer overflow and cause out-of-bounds heap reads or writes, potentially disclosing data, corrupting memory, or crashing the decoder. Version 1.1.1 contains a patch.
CVSS v3.1
Score 7.4high
Affected software
strukturag
libde265
pkg:github/strukturag/libde265Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
libde265 versions before 1.1.1 perform pixel offset calculations using signed 32-bit arithmetic. A crafted HEVC stream with large image dimensions can trigger an integer overflow or wraparound, resulting in out-of-bounds heap memory access. This vulnerability can cause information disclosure, memory corruption, or denial of service via decoder crashes. The vulnerability is tracked as CVE-2026-54240 and is addressed in libde265 version 1.1.1.
Potential Impact
Exploitation of this vulnerability can lead to high impact outcomes including disclosure of sensitive data, corruption of memory, and denial of service due to application crashes. The CVSS v3.1 base score is 7.4 (High), reflecting network attack vector with high impact on confidentiality and availability, and requiring high attack complexity.
Mitigation Recommendations
Users should upgrade libde265 to version 1.1.1 or later, where the integer overflow issue has been patched. No other mitigations are indicated or required according to the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-12T16:25:43.084Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa4737691cc7f3848ae20c8
Added to database: 09/11/2026, 21:32:38 UTC
Last enriched: 09/11/2026, 21:47:01 UTC
Last updated: 09/11/2026, 22:23:23 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.