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OpenAdvisories
High RHSA-2026:42739 2 CVEs

Red Hat Security Advisory: acl security update

Published Jul 23, 2026 · Updated Oct 16, 2026

Ecosystem: Red Hat

Fixed packages 6

ReleasePackageFixed in
Red Hat · RHEL 10 enterprise_linux:10.2 acl 0:2.4.0-1.el10_2
Red Hat · RHEL 10 enterprise_linux:10.2 acl-debuginfo 0:2.4.0-1.el10_2
Red Hat · RHEL 10 enterprise_linux:10.2 acl-debugsource 0:2.4.0-1.el10_2
Red Hat · RHEL 10 enterprise_linux:10.2 libacl 0:2.4.0-1.el10_2
Red Hat · RHEL 10 enterprise_linux:10.2 libacl-debuginfo 0:2.4.0-1.el10_2
Red Hat · RHEL 10 enterprise_linux:10.2 libacl-devel 0:2.4.0-1.el10_2

Vulnerabilities 2

  • High 7.1
    CVE-2026-54369

    acl < 2.4.0 Symlink Traversal Privilege Escalation via libacl Functions

    acl before version 2.4.0 contains a symlink traversal vulnerability in the libacl pathname-based functions acl_get_file(), acl_set_file(), acl_extended_file(), and acl_delete_def_file() that allows local attackers to escalate privileges by replacing any pathn…

    acl project acl acl acl Debian Ubuntu Azure Linux
  • Medium 6.3
    CVE-2026-54370

    acl < 2.4.0 TOCTOU Symlink Traversal via getfacl/setfacl/chacl

    acl before version 2.4.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability that allows local attackers to escalate privileges by replacing a pathname component with a symbolic link between an lstat() check and subsequent symlink-fo…

    acl project acl acl acl Debian Ubuntu Azure Linux

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2490277
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2490279
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_42739.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-54369
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-54369
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-54369
  • report
    https://access.redhat.com/security/cve/CVE-2026-54370
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-54370
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-54370