RHSA-2026:99915: Moderate: xz security update

Published Nov 12, 2026
·
Updated

Moderate: xz security update

Other sources

XZ Utils is an integrated collection of user-space file compression utilities based on the Lempel-Ziv-Markov chain algorithm (LZMA), which performs lossless data compression. The algorithm provides a high compression ratio while keeping the decompression time short.Security Fix(es): xz: XZ Utils: Denial of Service via buffer overflow in index decoding (CVE-2026-34743) 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

40 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for x86_64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux for Power, little endian - 4 years of support
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
redhat/xz<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-debuginfo<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-debugsource<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-devel<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-libs<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-libs-debuginfo<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-lzma-compat<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-lzma-compat-debuginfo<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-debuginfo<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-debugsource<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-devel<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-libs<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-libs-debuginfo<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-lzma-compat<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-lzma-compat-debuginfo<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-debuginfo<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-debugsource<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-devel<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-libs<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-libs-debuginfo<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-lzma-compat<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz-lzma-compat-debuginfo<5.6.2-4.el10_0.1
5.6.2-4.el10_0.1
redhat/xz<5.6.2-4.el10_0.1.aa
5.6.2-4.el10_0.1.aa
redhat/xz-debuginfo<5.6.2-4.el10_0.1.aa
5.6.2-4.el10_0.1.aa
redhat/xz-debugsource<5.6.2-4.el10_0.1.aa
5.6.2-4.el10_0.1.aa
redhat/xz-devel<5.6.2-4.el10_0.1.aa
5.6.2-4.el10_0.1.aa
redhat/xz-libs<5.6.2-4.el10_0.1.aa
5.6.2-4.el10_0.1.aa
redhat/xz-libs-debuginfo<5.6.2-4.el10_0.1.aa
5.6.2-4.el10_0.1.aa
redhat/xz-lzma-compat<5.6.2-4.el10_0.1.aa
5.6.2-4.el10_0.1.aa
redhat/xz-lzma-compat-debuginfo<5.6.2-4.el10_0.1.aa
5.6.2-4.el10_0.1.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 5.6.2-4.el10_0.1
  2. Upgrade

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

    Fixed in 5.6.2-4.el10_0.1
  3. Upgrade

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

    Fixed in 5.6.2-4.el10_0.1
  4. Upgrade

    Upgrade redhat/xz-devel to a version that resolves this vulnerability.

    Fixed in 5.6.2-4.el10_0.1
  5. Upgrade

    Upgrade redhat/xz-libs to a version that resolves this vulnerability.

    Fixed in 5.6.2-4.el10_0.1
  6. Upgrade

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

    Fixed in 5.6.2-4.el10_0.1
  7. Upgrade

    Upgrade redhat/xz-lzma-compat to a version that resolves this vulnerability.

    Fixed in 5.6.2-4.el10_0.1
  8. Upgrade

    Upgrade redhat/xz-lzma-compat-debuginfo to a version that resolves this vulnerability.

    Fixed in 5.6.2-4.el10_0.1
  9. Upgrade

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

    Fixed in 5.6.2-4.el10_0.1.aa
  10. Upgrade

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

    Fixed in 5.6.2-4.el10_0.1.aa
  11. Upgrade

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

    Fixed in 5.6.2-4.el10_0.1.aa
  12. Upgrade

    Upgrade redhat/xz-devel to a version that resolves this vulnerability.

    Fixed in 5.6.2-4.el10_0.1.aa
  13. Upgrade

    Upgrade redhat/xz-libs to a version that resolves this vulnerability.

    Fixed in 5.6.2-4.el10_0.1.aa
  14. Upgrade

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

    Fixed in 5.6.2-4.el10_0.1.aa
  15. Upgrade

    Upgrade redhat/xz-lzma-compat to a version that resolves this vulnerability.

    Fixed in 5.6.2-4.el10_0.1.aa
  16. Upgrade

    Upgrade redhat/xz-lzma-compat-debuginfo to a version that resolves this vulnerability.

    Fixed in 5.6.2-4.el10_0.1.aa

Event History

Nov 12, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·10:21 PM
Data Sourced
via Red Hat·10:21 PM
Severity

Frequently Asked Questions

1

Which package variants are included in this update?

The update covers xz, xz-debuginfo, xz-debugsource, xz-devel, xz-libs, xz-libs-debuginfo, xz-lzma-compat, and xz-lzma-compat-debuginfo.

Company

Resources

Contact

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