Medium severity · published Jul 21, 2026
CVE-2026-45383
libde265 has a heap buffer overflow (OOB read) in decode_slice_unit_WPP() via out-of-bounds CtbAddrRStoTS access — libde265 <= v1.0.18
6.9
CVSS
0.4%
EPSS
No
On KEV
Description
libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.0.19 have a heap buffer overflow (out-of-bounds READ) exists in `decoder_context::decode_slice_unit_WPP()` in `libde265/decctx.cc`. When decoding a WPP (Wavefront Parallel Processing) HEVC slice, `ctbAddrRS` is computed as `ctbRow * ctbsWidth` inside the entry-point loop. If the PPS/SPS headers are crafted so that this value exceeds `pps.CtbAddrRStoTS.size()`, the subsequent array access `pps.CtbAddrRStoTS[ctbAddrRS]` reads past the end of the allocated vector, triggering a heap-buffer-overflow confirmed by AddressSanitizer. Version 1.0.19 patches the issue.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libde265 · strukturag
< 1.0.19 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45383
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45383
github.com
https://github.com/strukturag/libde265/security/advisories/GHSA-wg9q-ppqw-6q38
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