Vulnerability Details CVE-2026-49346
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 13.4%
CVSS Severity
CVSS v3 Score 7.1
References
Products affected by CVE-2026-49346
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cpe:2.3:a:struktur:libde265:0.1
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cpe:2.3:a:struktur:libde265:0.10
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cpe:2.3:a:struktur:libde265:0.2
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cpe:2.3:a:struktur:libde265:0.3
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cpe:2.3:a:struktur:libde265:0.4
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cpe:2.3:a:struktur:libde265:0.5
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cpe:2.3:a:struktur:libde265:0.6
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cpe:2.3:a:struktur:libde265:0.7
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cpe:2.3:a:struktur:libde265:0.8
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cpe:2.3:a:struktur:libde265:0.9
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cpe:2.3:a:struktur:libde265:1.0.0
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cpe:2.3:a:struktur:libde265:1.0.1
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cpe:2.3:a:struktur:libde265:1.0.10
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cpe:2.3:a:struktur:libde265:1.0.11
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cpe:2.3:a:struktur:libde265:1.0.12
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cpe:2.3:a:struktur:libde265:1.0.14
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cpe:2.3:a:struktur:libde265:1.0.2
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cpe:2.3:a:struktur:libde265:1.0.3
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cpe:2.3:a:struktur:libde265:1.0.4
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cpe:2.3:a:struktur:libde265:1.0.5
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cpe:2.3:a:struktur:libde265:1.0.6
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cpe:2.3:a:struktur:libde265:1.0.7
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cpe:2.3:a:struktur:libde265:1.0.8
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cpe:2.3:a:struktur:libde265:1.0.9