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CVE-2026-49346

libde265 has a heap buffer overflow in de265_image_get_buffer via SPS dimension integer overflow

Published: Jun 19, 2026Updated: Jun 22, 2026 Sources: CVE List NVDCWE-190
NVD MITRE
7.1CVSSHIGH
EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.1.0, a crafted H.265 bitstream with large SPS dimensions and 16-bit bit depth causes a signed integer overflow in `de265_image_get_buffer()` (`libde265/image.cc:128`). The overflow wraps the plane allocation size to a small value (~1 KB), but the subsequent `fill_image()` call computes the real size using `size_t`, writing ~4 GB into the undersized heap buffer. Version 1.1.0 patches the issue.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:NI:LA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:HAvailability
High
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Weaknesses

CWE-190

Affected Products

libde265strukturag
Library
OSS Libraries / generic-library
strukturagoss-projectOSS Librariesaka libheif, libde265, strukturag/libde265

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Initial Access
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References

https://github.com/strukturag/libde265/commit/8a1b5cf212f78e1c77cb46eb5d56e492a9336eb8
github.com
https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86
github.com

Timeline

Published
Jun 19, 2026
Last Updated
Jun 22, 2026

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