Affected: AlmaLinux:8: munge, AlmaLinux:8: munge-devel, AlmaLinux:8: munge-libs

MUNGE (MUNGE Uid 'N' Gid Emporium) is an authentication service for creating and validating credentials. It is designed to be highly scalable for use in an HPC cluster environment. It allows a process to authenticate the UID and GID of another local or remote process within a group of hosts having common users and groups. These hosts form a security realm that is defined by a shared cryptographic key. Clients within this security realm can create and validate credentials without the use of root privileges, reserved ports, or platform-specific methods.

Security Fix(es):

* MUNGE: MUNGE has a buffer overflow in message unpacking allows key leakage and credential forgery (CVE-2026-25506)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

MUNGE is an authentication service for creating and validating user credentials. From 0.5 to 0.5.17, local attacker can exploit a buffer overflow vulnerability in munged (the MUNGE authentication daemon) to leak cryptographic key material from process memory. With the leaked key material, the attacker could forge arbitrary MUNGE credentials to impersonate any user (including root) to services that rely on MUNGE for authentication. The vulnerability allows a buffer overflow by sending a crafted message with an oversized address length field, corrupting munged's internal state and enabling extraction of the MAC subkey used for credential verification. This vulnerability is fixed in 0.5.18.

Affected: openEuler:20.03-LTS-SP4: munge, openEuler:22.03-LTS-SP4: munge, openEuler:24.03-LTS: munge, openEuler:24.03-LTS-SP1: munge, openEuler:24.03-LTS-SP2: munge, openEuler:24.03-LTS-SP3: munge

MUNGE (MUNGE Uid 'N' Gid Emporium) is an authentication service for creating and validating credentials. It is designed to be highly scalable for use in an HPC cluster environment. It allows a process to authenticate the UID and GID of another local or remote process within a group of hosts having common users and groups. These hosts form a security realm that is defined by a shared cryptographic key. Clients within this security realm can create and validate credentials without the use of root privileges, reserved ports, or platform-specific methods. Security Fix(es):

MUNGE is an authentication service for creating and validating user credentials. From 0.5 to 0.5.17, local attacker can exploit a buffer overflow vulnerability in munged (the MUNGE authentication daemon) to leak cryptographic key material from process memory. With the leaked key material, the attacker could forge arbitrary MUNGE credentials to impersonate any user (including root) to services that rely on MUNGE for authentication. The vulnerability allows a buffer overflow by sending a crafted message with an oversized address length field, corrupting munged's internal state and enabling extraction of the MAC subkey used for credential verification. This vulnerability is fixed in 0.5.18.(CVE-2026-25506)

libmunge2-0.5.18-1.1 on GA media

libxslt: Processing web content may disclose sensitive information libtiff: Segment fault in libtiff in TIFFReadRGBATileExt() leading to denial of service cpython: Excessive read buffering DoS in http.client gnutls: GnuTLS: Denial of Service via excessive resource consumption during certificate verification cpython: IMAP command injection in user-controlled commands cpython: POP3 command injection in user-controlled commands python: protobuf: Protobuf: Denial of Service due to recursion depth bypass cpython: email header injection due to unquoted newlines libvpx: Heap buffer overflow in libvpx openssh: OpenSSH GSSAPI: Information disclosure or denial of service due to uninitialized variables libarchive: Infinite Loop Denial of Service in RAR5 Decompression via archive_read_data() in libarchive libarchive: libarchive: Information disclosure via heap out-of-bounds read in RAR archive processing python: Python: Command-line option injection in webbrowser.open() via crafted URLs libarchive: libarchive: Arbitrary code execution via integer overflow in ISO9660 image processing gdk-pixbuf: gdk-pixbuf: Denial of Service via heap-based buffer overflow when processing a specially crafted JPEG image libpng: libpng: Denial of service and information disclosure via heap buffer over-read in png_image_finish_read libpng: libpng: Information disclosure and denial of service via integer truncation in simplified write API giflib: Giflib: Double-free vulnerability leading to memory corruption…

Security update for munge

Affected: Ubuntu:Pro:14.04:LTS: munge, Ubuntu:Pro:16.04:LTS: munge, Ubuntu:Pro:18.04:LTS: munge, Ubuntu:Pro:20.04:LTS: munge, Ubuntu:22.04:LTS: munge, Ubuntu:24.04:LTS: munge, Ubuntu:25.10: munge

MUNGE is an authentication service for creating and validating user credentials. From 0.5 to 0.5.17, local attacker can exploit a buffer overflow vulnerability in munged (the MUNGE authentication daemon) to leak cryptographic key material from process memory. With the leaked key material, the attacker could forge arbitrary MUNGE credentials to impersonate any user (including root) to services that rely on MUNGE for authentication. The vulnerability allows a buffer overflow by sending a crafted message with an oversized address length field, corrupting munged's internal state and enabling extraction of the MAC subkey used for credential verification. This vulnerability is fixed in 0.5.18.

Ein lokaler Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux bezüglich "MUNGE" ausnutzen, um seine Privilegien zu erhöhen.