CVE-2026-45382 Details
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.
A heap-buffer-overflow vulnerability has been identified in libde265, an open-source implementation of the H.265 video codec, prior to version 1.0.19. The issue arises in the 'decoder_context::decode_slice_unit_tiles' function, where the decoder reads tile geometry data from the Picture Parameter Set (PPS) without proper validation. This lack of validation can lead to reading data beyond the allocated buffer, causing a 4-byte heap-buffer-overflow read. The vulnerability is triggered when worker threads are enabled, and the PPS contains geometry that is inconsistent with the Sequence Parameter Set (SPS), allowing for a crafted PPS to exploit the flaw.
Users are advised to update to libde265 version 1.0.19 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 21, 2026CISA-ADP
Assessed Jul 23, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/strukturag/libde265/security/advisories/GHSA-hwhx-x2mq-ccr9 | CISA-ADP | AdvisoryExploitRemedyTechnical AnalysisVendor |
| https://github.com/strukturag/libde265/security/advisories/GHSA-hwhx-x2mq-ccr9 | [email protected] | AdvisoryExploitRemedyTechnical AnalysisVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| libde265 | <= 1.0.18 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Modified | CISA-ADP |
| Jul 21, 2026 | New CVE Received | [email protected] |