Medium severity · published Jul 21, 2026
CVE-2026-45382
libde265 has a heap-buffer-overflow READ in decode_slice_unit_tiles via unvalidated PPS tile geometry
6.9
CVSS
0.4%
EPSS
No
On KEV
Description
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.
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-2026-45382
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45382
github.com
https://github.com/strukturag/libde265/security/advisories/GHSA-hwhx-x2mq-ccr9
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