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CVE-2026-49337

22
FAUCET Score

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.

First published: Jun 19, 2026Last modified: Jun 19, 2026

Impacted Technologies

VendorProductVersion(s)CPE
StrukturagLibde265
< 1.0.20CNA affected

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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 Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.19%
Probability of exploitation in next 30 days
EPSS Percentile
9.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0019 is in the 9th percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

ubuntupatch availablevia ubuntu_usn
Product: libde265 (bionic)Fixed in: 1.0.2-2ubuntu0.18.04.1~esm6
ubuntupatch availablevia ubuntu_usn
Product: libde265 (focal)Fixed in: 1.0.4-1ubuntu0.4+esm2
ubuntupatch availablevia ubuntu_usn
Product: libde265 (jammy)Fixed in: 1.0.8-1ubuntu0.3+esm2
ubuntupatch availablevia ubuntu_usn
Product: libde265 (noble)Fixed in: 1.0.15-1ubuntu0.1
ubuntupatch availablevia ubuntu_usn
Product: libde265 (resolute)Fixed in: 1.0.16-1ubuntu0.1~esm1
ubuntupatch availablevia ubuntu_usn
Product: libde265 (xenial)Fixed in: 1.0.2-2ubuntu0.16.04.1~esm6

Vendor Advisories (1)

ubuntuUSN-8573-1

libde265 vulnerabilities

Jul 20, 2026

References

github.com / strukturag/libde265/commit/683cb9fa603e35840642f98765ab95cdb71cadf9
github.com / strukturag/libde265/security/advisories/GHSA-g5hj-rf9f-7vxm