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OpenAdvisories
Medium RHSA-2026:67886 2 CVEs

Red Hat Security Advisory: coreutils security update

Published Sep 17, 2026 · Updated Oct 14, 2026

Ecosystem: Red Hat

Fixed packages 5

ReleasePackageFixed in
Red Hat · RHEL 10 enterprise_linux:10.2 coreutils 0:9.5-8.el10_2.1
Red Hat · RHEL 10 enterprise_linux:10.2 coreutils-debuginfo 0:9.5-8.el10_2.1
Red Hat · RHEL 10 enterprise_linux:10.2 coreutils-debugsource 0:9.5-8.el10_2.1
Red Hat · RHEL 10 enterprise_linux:10.2 coreutils-single 0:9.5-8.el10_2.1
Red Hat · RHEL 10 enterprise_linux:10.2 coreutils-single-debuginfo 0:9.5-8.el10_2.1

Vulnerabilities 2

  • Medium 4.6
    CVE-2026-56391

    Out‑of‑bounds Read in GNU coreutils

    GNU coreutils uniq is vulnerable to an out‑of‑bounds read due to incorrect handling of multibyte input when the -w (--check-chars) option is used. The find_field() function miscalculates the byte length of characters by repeatedly processing a fixed pointer i…

    GNU coreutils coreutils coreutils Debian Ubuntu
  • Low 1.8
    CVE-2026-56392

    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…

    GNU coreutils coreutils Debian

References

  • article
    https://access.redhat.com/security/updates/classification/#moderate
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2506691
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2506694
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_67886.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-56391
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-56391
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-56391
  • article
    https://cert.pl/en/posts/2026/07/CVE-2026-56391
  • article
    https://git.savannah.gnu.org/cgit/coreutils.git/
  • article
    https://git.savannah.gnu.org/cgit/coreutils.git/commit/?id=d64e35a8a4c0e4608321433e0d84d917e4e36371
  • report
    https://access.redhat.com/security/cve/CVE-2026-56392
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-56392
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-56392
  • article
    https://git.savannah.gnu.org/cgit/coreutils.git/commit/?id=b60a159fdc5bfcf9988d3a4cb6f53abe8ad5d35d