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CVE-2026-49346— libde265 has a heap buffer overflow in de265_image_get_buffer via SPS dimension integer overflow

Quick assessment

Affected
strukturag libde265
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

strukturag libde265是strukturag公司的一个处理HEVC视频编码的库。 strukturag libde265 1.1.0之前版本存在数字错误漏洞，该漏洞源于在 函数中，精心构造的H.265比特流会导致有符号整数溢出，分配大小被包装为小值，后续 调用写入约4GB数据到过小的堆缓冲区。

CVSS 7.1 · High EPSS 0.34% · P25

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
strukturag libde265 < 1.1.0 affected
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I. Basic Information for CVE-2026-49346

Vulnerability Information
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Vulnerability Title
libde265 has a heap buffer overflow in de265_image_get_buffer via SPS dimension integer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.1.0, a crafted H.265 bitstream with large SPS dimensions and 16-bit bit depth causes a signed integer overflow in `de265_image_get_buffer()` (`libde265/image.cc:128`). The overflow wraps the plane allocation size to a small value (~1 KB), but the subsequent `fill_image()` call computes the real size using `size_t`, writing ~4 GB into the undersized heap buffer. Version 1.1.0 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/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
strukturag libde265 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
strukturag libde265是strukturag公司的一个处理HEVC视频编码的库。 strukturag libde265 1.1.0之前版本存在数字错误漏洞，该漏洞源于在`de265_image_get_buffer()`函数中，精心构造的H.265比特流会导致有符号整数溢出，分配大小被包装为小值，后续`fill_image()`调用写入约4GB数据到过小的堆缓冲区。
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 < 1.1.0 -

II. Public POCs for CVE-2026-49346

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7522 chars
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III. Intelligence Information for CVE-2026-49346

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Patches & Fixes for CVE-2026-49346 (1)

Vendor Advisories for CVE-2026-49346 (1)

Same Patch Batch · strukturag · 2026-06-19 · 4 CVEs total

CVE-2026-49295 7.1 HIGH libde265 has an out-of-bounds write in process_reference_picture_set via predicted short-t
CVE-2026-49271 6.5 MEDIUM libheif: Wrapped icef compressed-unit range check causes out-of-bounds read in uncompresse
CVE-2026-49337 4.3 MEDIUM libde265 has an unbounded memory leak via orphaned slice headers in `read_slice_NAL`

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-49346

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