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CVE-2026-54240— libde265: Pixel accessor signed integer overflow causes heap OOB read/write

Quick assessment

Affected
strukturag libde265
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

struktur AG libde265是struktur AG组织的一款H.265视频解码库。 struktur AG libde265 1.1.1之前版本存在安全漏洞，该漏洞源于使用有符号32位算术计算像素偏移，特制的具有大图像尺寸的HEVC流可触发整数溢出，导致堆越界读取或写入，可能泄露数据、破坏内存或导致解码器崩溃。

CVSS 7.4 · High EPSS 0.39% · P33

Affected Version Matrix 1

VendorProduct Version RangeStatus
strukturag libde265 < 1.1.1 affected
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I. Basic Information for CVE-2026-54240

Vulnerability Information
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Vulnerability Title
libde265: Pixel accessor signed integer overflow causes heap OOB read/write
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
struktur AG libde265 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
struktur AG libde265是struktur AG组织的一款H.265视频解码库。 struktur AG libde265 1.1.1之前版本存在安全漏洞，该漏洞源于使用有符号32位算术计算像素偏移，特制的具有大图像尺寸的HEVC流可触发整数溢出，导致堆越界读取或写入，可能泄露数据、破坏内存或导致解码器崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
strukturag libde265 < 1.1.1 -

II. Public POCs for CVE-2026-54240

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III. Intelligence Information for CVE-2026-54240

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Vendor Advisories for CVE-2026-54240 (1)

IV. Related Vulnerabilities

Same product: libde265
Same vendor: strukturag
Same weakness: CWE-190