Bug 2477617 (CVE-2026-44673) - CVE-2026-44673 libyang: libyang: Denial of Service or arbitrary code execution via maliciously crafted LYB binary blob
Summary: CVE-2026-44673 libyang: libyang: Denial of Service or arbitrary code executio...
Keywords:
Status: NEW
Alias: CVE-2026-44673
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2477966
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-14 21:01 UTC by OSIDB Bzimport
Modified: 2026-08-06 21:14 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:24545 0 None None None 2026-06-08 18:24:52 UTC
Red Hat Product Errata RHSA-2026:24758 0 None None None 2026-06-09 09:53:57 UTC
Red Hat Product Errata RHSA-2026:25051 0 None None None 2026-06-10 11:14:41 UTC
Red Hat Product Errata RHSA-2026:49666 0 None None None 2026-08-03 12:00:22 UTC
Red Hat Product Errata RHSA-2026:51339 0 None None None 2026-08-06 21:01:23 UTC
Red Hat Product Errata RHSA-2026:51351 0 None None None 2026-08-06 21:04:55 UTC
Red Hat Product Errata RHSA-2026:51368 0 None None None 2026-08-06 21:14:32 UTC

Description OSIDB Bzimport 2026-05-14 21:01:31 UTC 
libyang is a YANG data modeling language library. Prior to SO 5.2.15, lyb_read_string() in src/parser_lyb.c contains an integer overflow that results in a heap buffer overflow when parsing a maliciously crafted LYB binary blob. An attacker who can supply LYB data to any libyang consumer (NETCONF server, sysrepo, etc.) can trigger a crash or potential heap corruption. This vulnerability is fixed in SO 5.2.15.
Comment 2 errata-xmlrpc 2026-06-08 18:24:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:24545 https://access.redhat.com/errata/RHSA-2026:24545
Comment 3 errata-xmlrpc 2026-06-09 09:53:56 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:24758 https://access.redhat.com/errata/RHSA-2026:24758
Comment 4 errata-xmlrpc 2026-06-10 11:14:40 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:25051 https://access.redhat.com/errata/RHSA-2026:25051
Comment 5 errata-xmlrpc 2026-08-03 12:00:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:49666 https://access.redhat.com/errata/RHSA-2026:49666
Comment 6 errata-xmlrpc 2026-08-06 21:01:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:51339 https://access.redhat.com/errata/RHSA-2026:51339
Comment 7 errata-xmlrpc 2026-08-06 21:04:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:51351 https://access.redhat.com/errata/RHSA-2026:51351
Comment 8 errata-xmlrpc 2026-08-06 21:14:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:51368 https://access.redhat.com/errata/RHSA-2026:51368
Note You need to log in before you can comment on or make changes to this bug.