Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Fixed packages 4

Vulnerabilities 2

• Medium 5.5
  CVE-2026-4897

  Polkit: polkit: denial of service via unbounded input processing through standard input

  A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively long input to the `polkit-agent-helper-1` setuid binary via standard input (stdin). This unbounded input can lead to an out-of-memory (OOM) condition, resu…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux
  Mar 26, 2026
• Low 3.5
  CVE-2026-85498

  Polkit: regression in cve-2026-4897 fix (polkit read_cookie()) - stack buffer underflow

  A flaw was found in polkit. When processing input that begins with a null byte, an arithmetic error in the authentication agent helper causes an integer underflow during buffer length calculation, resulting in an out-of-bounds memory read. An attacker capable…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu
  Oct 29, 2026

References

• report
  https://access.redhat.com/security/cve/CVE-2026-4897
• report
  https://access.redhat.com/security/cve/CVE-2026-85498
• article
  https://access.redhat.com/security/updates/classification/
• article
  https://images.redhat.com/
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_66287.json
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2451739
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-4897
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-4897
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2528347
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-85498
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-85498