CVE-2026-49337
libde265 has an unbounded memory leak via orphaned slice headers in `read_slice_NAL`
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted sequence of H.265 NAL units causes `decoder_context::read_slice_NAL()` (`libde265/decctx.cc:481`) to attach slice headers to a finished picture object that has no active image unit, resulting in attacker-controlled unbounded heap growth. The retained headers are never freed until the picture is released, which may not happen during continuous streaming. Version 1.0.20 patches the issue.
| CWE | CWE-770 |
| Vendor | strukturag |
| Product | libde265 |
| Published | Jun 19, 2026 |
| Last Updated | Jun 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
strukturag / libde265
< 1.0.20