CVE-2026-54240: high-severity vulnerability in strukturag libde265
libde265: Pixel accessor signed integer overflow causes heap OOB read/write
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.4epss 0.4%
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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
Affected products
strukturag · libde265Related CVEs — strukturag libde265
In the same product, most dangerous first.
CVE-2026-45382MEDIUMlibde265 has a heap-buffer-overflow READ in decode_slice_unit_tiles via unvalidated PPS tile geometryEPSS 0.4%CVE-2026-45383MEDIUMlibde265 has a heap buffer overflow (OOB read) in decode_slice_unit_WPP() via out-of-bounds CtbAddrRStoTS access — libde265 <= v1.0.18EPSS 0.4%CVE-2026-54241HIGHlibde265: SAO sequential filter heap buffer overflow via signed integer overflowEPSS 0.4%CVE-2026-49346HIGHlibde265 has a heap buffer overflow in de265_image_get_buffer via SPS dimension integer overflowEPSS 0.4%CVE-2026-33164HIGHNULL Pointer Dereference in libde265EPSS 0.4%CVE-2026-49295HIGHlibde265 has an out-of-bounds write in process_reference_picture_set via predicted short-term RPSEPSS 0.3%