Vulnerability Details CVE-2026-49295
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted H.265 bitstream can cause an out-of-bounds array write in `decoder_context::process_reference_picture_set()` (`libde265/decctx.cc:1376`). The root cause is a missing aggregate bound check on predicted short-term reference picture set entries. Individual list sizes are validated, but the combined count after predicted RPS construction can exceed the 16-entry `PocStFoll` array, writing at index 16. Version 1.0.20 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-2026-49295
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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