Red Hat Security Advisory: tar security, bug fix, and enhancement update

Fixed packages 3

Vulnerabilities 3

• Medium 5.0
  CVE-2026-5704

  Tar: tar: hidden file injection via crafted archives

  A flaw was found in tar. A remote attacker could exploit this vulnerability by crafting a malicious archive, leading to hidden file injection with fully attacker-controlled content. This bypasses pre-extraction inspection mechanisms, potentially allowing an a…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux Wolfi
  Apr 6, 2026
• Medium 4.4
  CVE-2026-18477

  Tar: tar: toctou in incremental dumpdir 'x' rename handling allows restore path escape

  A TOCTOU (Time-of-Check Time-of-Use) vulnerability in GNU tar's incremental dumpdir 'X' rename handling allows a local attacker with write access to a directory being backed up to influence the restore process if the attacker has access to the system where th…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux Wolfi
  Aug 3, 2026
• Medium 4.4
  CVE-2026-18508

  Tar: tar: --one-top-level hardlink targets not confined to top-level directory enabling arbitrary file overwrite

  A flaw was found in GNU tar. When extracting an archive with the --one-top-level option, hardlink targets are not confined to the designated top-level directory and may resolve relative to the extraction working directory. A crafted archive can create hardlin…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux Wolfi
  Aug 3, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#moderate
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2455360
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2509735
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2509843
• article
  https://issues.redhat.com/browse/RHEL-143906
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_61586.json
• report
  https://access.redhat.com/security/cve/CVE-2026-5704
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-5704
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-5704
• report
  https://access.redhat.com/security/cve/CVE-2026-18477
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-18477
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-18477
• report
  https://access.redhat.com/security/cve/CVE-2026-18508
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-18508
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-18508