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

Fixed packages 3

Vulnerabilities 5

• High 7.3
  CVE-2026-88832

  Busybox: busybox: romfs volume id parsing performs unbounded memcpy into fixed-size label buffer, causing heap overflow

  BusyBox romfs volume ID parsing uses unbounded strlen on attacker-controlled metadata, causing a heap buffer overflow when processing crafted filesystem images.

  Red Hat Red Hat Hardened Images busybox busybox Debian Ubuntu Azure Linux
  Sep 23, 2026
• Medium 6.7
  CVE-2026-88839

  Busybox: busybox: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint

  BusyBox passwd/group tokenize() references a stale endpoint pointer after trimming, causing an out-of-bounds write of heap pointers.

  Red Hat Red Hat Hardened Images busybox busybox Debian Ubuntu Azure Linux
  Sep 23, 2026
• Medium 6.5
  CVE-2026-88837

  Busybox: busybox: httpd misidentifies yescrypt password hashes as plaintext, inverting authentication

  BusyBox httpd treats yescrypt ($y$) password hashes as plaintext during Basic Authentication, inverting the authentication check.

  Red Hat Red Hat Hardened Images busybox busybox Debian Ubuntu
  Sep 23, 2026
• Medium 6.1
  CVE-2026-88835

  Busybox: busybox: dpkg read_package_field() steps past nul terminator, causing out-of-bounds read on malformed .deb packages

  BusyBox dpkg read_package_field() steps past a NUL terminator on malformed .deb packages, causing an out-of-bounds heap read.

  Red Hat Red Hat Hardened Images busybox busybox Debian Ubuntu Azure Linux
  Sep 23, 2026
• Medium 5.3
  CVE-2026-88831

  Busybox: busybox: httpd silently fails open when ip deny rules contain invalid cidr prefix lengths

  BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients.

  Red Hat Red Hat Hardened Images busybox busybox Debian Ubuntu Azure Linux
  Sep 23, 2026

References

• report
  https://access.redhat.com/security/cve/CVE-2026-88831
• report
  https://access.redhat.com/security/cve/CVE-2026-88832
• report
  https://access.redhat.com/security/cve/CVE-2026-88835
• report
  https://access.redhat.com/security/cve/CVE-2026-88837
• report
  https://access.redhat.com/security/cve/CVE-2026-88839
• 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_72111.json
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2531346
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-88831
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-88831
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2531345
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-88832
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-88832
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2531349
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-88835
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-88835
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2531351
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-88837
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-88837
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2531353
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-88839
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-88839