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Medium RLSA-2026:66403 1 CVE

Moderate: coreutils security update

Published Sep 11, 2026 · Updated Sep 11, 2026

Summary

The coreutils packages contain the GNU Core Utilities and represent a combination of the previously used GNU fileutils, sh-utils, and textutils packages.

Security Fix(es):

* coreutils: GNU coreutils unexpand: Denial of Service via crafted tab stop values (CVE-2026-56392)

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.

Fixed packages 1

ReleasePackageFixed in
Rocky Linux · 9 coreutils 0:8.32-41.el9_8.1

Vulnerabilities 1

  • Low 1.8

    Heap-based Buffer Overflow in GNU coreutils

    GNU coreutils unexpand is vulnerable to a heap-based buffer overflow due to an integer overflow during buffer allocation when processing large tab stop (-t) values. The multiplication used to calculate the allocation size can wrap around, resulting in an unde…

References

  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2506694
  • advisory
    https://access.redhat.com/errata/RHSA-2026:66403