Util Linux
Monthly
Unauthorized read access to root-owned files via TOCTOU race condition in util-linux mount binary (versions prior to 2.41.4) allows local users with existing fstab entries to replace loop device source files with symlinks pointing to sensitive files or block devices, bypassing intended access controls. The vulnerability requires moderate exploitation effort (AC:H) and authenticated user access (PR:L) but grants disclosure of confidential data including filesystem backups and disk volumes. No public exploit code or active CISA KEV status identified at time of analysis.
wall in util-linux through 2.40, often installed with setgid tty permissions, allows escape sequences to be sent to other users' terminals through argv. Rated low severity (CVSS 3.3), this vulnerability is low attack complexity. Public exploit code available and EPSS exploitation probability 10.2%.
A flaw was found in the util-linux chfn and chsh utilities when compiled with Readline support. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
An integer overflow in util-linux through 2.37.1 can potentially cause a buffer overflow if an attacker were able to use system resources in a way that leads to a large number in the. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash). Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
The mkostemp function in login-utils in util-linux when used incorrectly allows remote attackers to cause file name collision and possibly other attacks. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
The parse_dos_extended function in partitions/dos.c in the libblkid library in util-linux allows physically proximate attackers to cause a denial of service (memory consumption) via a crafted MSDOS. Rated medium severity (CVSS 4.6), this vulnerability is no authentication required, low attack complexity.
Blkid in util-linux before 2.26rc-1 allows local users to execute arbitrary code. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This Command Injection vulnerability could allow attackers to inject arbitrary commands into system command execution.
runuser in util-linux allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
Buffer overflow in text-utils/colcrt.c in colcrt in util-linux before 2.27 allows local users to cause a denial of service (crash) via a crafted file, related to the page global variable. Rated low severity (CVSS 2.1), this vulnerability is low attack complexity. Public exploit code available.
(a) mount and (b) umount in util-linux 2.14.1, 2.17.2, and probably other versions allow local users to determine the existence of restricted directories by (1) using the --guess-fstype command-line. Rated low severity (CVSS 2.1), this vulnerability is low attack complexity. No vendor patch available.
Unauthorized read access to root-owned files via TOCTOU race condition in util-linux mount binary (versions prior to 2.41.4) allows local users with existing fstab entries to replace loop device source files with symlinks pointing to sensitive files or block devices, bypassing intended access controls. The vulnerability requires moderate exploitation effort (AC:H) and authenticated user access (PR:L) but grants disclosure of confidential data including filesystem backups and disk volumes. No public exploit code or active CISA KEV status identified at time of analysis.
wall in util-linux through 2.40, often installed with setgid tty permissions, allows escape sequences to be sent to other users' terminals through argv. Rated low severity (CVSS 3.3), this vulnerability is low attack complexity. Public exploit code available and EPSS exploitation probability 10.2%.
A flaw was found in the util-linux chfn and chsh utilities when compiled with Readline support. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
An integer overflow in util-linux through 2.37.1 can potentially cause a buffer overflow if an attacker were able to use system resources in a way that leads to a large number in the. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash). Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
The mkostemp function in login-utils in util-linux when used incorrectly allows remote attackers to cause file name collision and possibly other attacks. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
The parse_dos_extended function in partitions/dos.c in the libblkid library in util-linux allows physically proximate attackers to cause a denial of service (memory consumption) via a crafted MSDOS. Rated medium severity (CVSS 4.6), this vulnerability is no authentication required, low attack complexity.
Blkid in util-linux before 2.26rc-1 allows local users to execute arbitrary code. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This Command Injection vulnerability could allow attackers to inject arbitrary commands into system command execution.
runuser in util-linux allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
Buffer overflow in text-utils/colcrt.c in colcrt in util-linux before 2.27 allows local users to cause a denial of service (crash) via a crafted file, related to the page global variable. Rated low severity (CVSS 2.1), this vulnerability is low attack complexity. Public exploit code available.
(a) mount and (b) umount in util-linux 2.14.1, 2.17.2, and probably other versions allow local users to determine the existence of restricted directories by (1) using the --guess-fstype command-line. Rated low severity (CVSS 2.1), this vulnerability is low attack complexity. No vendor patch available.