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CVE-2026-49346

Struktur Libde265 integer overflow

7.1 HIGHPublic exploitEPSS 0.34%
  1. Published19 Jun 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Affected products

Struktur Libde265< 1.1.0

Remediation

Fixed in
Struktur Libde265≥ 1.1.0

References

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Frequently asked

Is CVE-2026-49346 being actively exploited?

CVE-2026-49346 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.34%.

How severe is CVE-2026-49346?

CVE-2026-49346 has a CVSS 3.1 base score of 7.1, rated high. EPSS estimates a 0.34% probability of exploitation.

Which products are affected by CVE-2026-49346?

Affected products include Struktur Libde265.

How do I fix CVE-2026-49346?

Upgrade affected software to a fixed version, for example Struktur Libde265 1.1.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-49346 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.