RHSA-2026:49666: Important: libyang security update

Published Aug 3, 2026
·
Updated

Important: libyang security update

Other sources

Libyang is YANG data modeling language parser and toolkit written (and providing API) in C.Security Fix(es): libyang: libyang: Denial of Service or arbitrary code execution via maliciously crafted LYB binary blob (CVE-2026-44673) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

— Red Hat

Affected Software

24 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Red Hat Enterprise Linux for Power, little endian - 4 years of support
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for x86_64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Update Support
redhat/libyang<2.1.148-2.el10_0.1
2.1.148-2.el10_0.1
redhat/libyang<2.1.148-2.el10_0.1
2.1.148-2.el10_0.1
redhat/libyang-debuginfo<2.1.148-2.el10_0.1
2.1.148-2.el10_0.1
redhat/libyang-debugsource<2.1.148-2.el10_0.1
2.1.148-2.el10_0.1
redhat/libyang-tools-debuginfo<2.1.148-2.el10_0.1
2.1.148-2.el10_0.1
redhat/libyang-debuginfo<2.1.148-2.el10_0.1
2.1.148-2.el10_0.1
redhat/libyang-debugsource<2.1.148-2.el10_0.1
2.1.148-2.el10_0.1
redhat/libyang-tools-debuginfo<2.1.148-2.el10_0.1
2.1.148-2.el10_0.1
redhat/libyang<2.1.148-2.el10_0.1
2.1.148-2.el10_0.1
redhat/libyang-debuginfo<2.1.148-2.el10_0.1
2.1.148-2.el10_0.1
redhat/libyang-debugsource<2.1.148-2.el10_0.1
2.1.148-2.el10_0.1
redhat/libyang-tools-debuginfo<2.1.148-2.el10_0.1
2.1.148-2.el10_0.1
redhat/libyang<2.1.148-2.el10_0.1.aa
2.1.148-2.el10_0.1.aa
redhat/libyang-debuginfo<2.1.148-2.el10_0.1.aa
2.1.148-2.el10_0.1.aa
redhat/libyang-debugsource<2.1.148-2.el10_0.1.aa
2.1.148-2.el10_0.1.aa
redhat/libyang-tools-debuginfo<2.1.148-2.el10_0.1.aa
2.1.148-2.el10_0.1.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/libyang to a version that resolves this vulnerability.

    Fixed in 2.1.148-2.el10_0.1
  2. Upgrade

    Upgrade redhat/libyang-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.1.148-2.el10_0.1
  3. Upgrade

    Upgrade redhat/libyang-debugsource to a version that resolves this vulnerability.

    Fixed in 2.1.148-2.el10_0.1
  4. Upgrade

    Upgrade redhat/libyang-tools-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.1.148-2.el10_0.1
  5. Upgrade

    Upgrade redhat/libyang to a version that resolves this vulnerability.

    Fixed in 2.1.148-2.el10_0.1.aa
  6. Upgrade

    Upgrade redhat/libyang-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.1.148-2.el10_0.1.aa
  7. Upgrade

    Upgrade redhat/libyang-debugsource to a version that resolves this vulnerability.

    Fixed in 2.1.148-2.el10_0.1.aa
  8. Upgrade

    Upgrade redhat/libyang-tools-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.1.148-2.el10_0.1.aa

Event History

Aug 3, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·11:43 AM
Data Sourced
via Red Hat·11:43 AM
Severity
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of RHSA-2026:49666?

The severity of RHSA-2026:49666 is rated as high, with a score of 7.

2

What vulnerabilities are addressed in RHSA-2026:49666?

RHSA-2026:49666 addresses a denial of service or arbitrary code execution vulnerability via maliciously crafted LYB binary blob (CVE-2026-44673).

3

How do I fix RHSA-2026:49666?

To fix RHSA-2026:49666, update your libyang packages to the latest version provided by Red Hat.

4

Which software packages are affected by RHSA-2026:49666?

The affected packages include redhat/libyang, redhat/libyang-debuginfo, redhat/libyang-debugsource, and redhat/libyang-tools-debuginfo.

5

What is libyang in the context of RHSA-2026:49666?

Libyang is a YANG data modeling language parser and toolkit written in C, which is impacted by the security update described in RHSA-2026:49666.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203