Bug 2504754 (CVE-2026-45382) - CVE-2026-45382 libde265: libde265: Denial of Service due to heap-buffer-overflow when processing malformed H.265 video
Summary: CVE-2026-45382 libde265: libde265: Denial of Service due to heap-buffer-overf...
Keywords:
Status: NEW
Alias: CVE-2026-45382
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-21 22:03 UTC by OSIDB Bzimport
Modified: 2026-07-22 11:35 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-21 22:03:16 UTC 
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.19, `decoder_context::decode_slice_unit_tiles` (libde265/decctx.cc:920) reads `pps.CtbAddrRStoTS[ctbAddrRS]` at line 966 where `ctbAddrRS = ctbY * ctbsWidth + ctbX` is computed from PPS-supplied `colBd[]`/`rowBd[]` arrays without validating the result against `CtbAddrRStoTS.size() == sps->PicSizeInCtbsY`. A malformed PPS that passes `set_derived_values` but encodes geometry inconsistent with the SPS produces a `ctbAddrRS` past the allocation, causing a 4-byte heap-buffer-overflow READ. Version 1.0.19 fixes the issue.
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