Detections
Analytics
AlmaLinux 9.6 [TuxCare] Security Update: libblkid / libblkid-devel / libfdisk / libfdisk-devel / libmount / etc Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1782989143)
medium Nessus Plugin ID 361386
Synopsis
The AlmaLinux host is missing one or more security updates.Description
The AlmaLinux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1782989143 advisory.- 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. (Specifically, escape sequences received from stdin are blocked, but escape sequences received from argv are not blocked.) There may be plausible scenarios where this leads to account takeover. (CVE-2024-28085)
- A flaw was found in util-linux. This vulnerability allows a heap buffer overread when processing 256-byte usernames, specifically within the `setpwnam()` function, affecting SUID (Set User ID) login-utils utilities writing to the password database. (CVE-2025-14104)
- util-linux is a random collection of Linux utilities. Prior to version 2.41.4, a TOCTOU (Time-of-Check- Time-of-Use) vulnerability has been identified in the SUID binary /usr/bin/mount from util-linux. The mount binary, when setting up loop devices, validates the source file path with user privileges via fork() + setuid() + realpath(), but subsequently re-canonicalizes and opens it with root privileges (euid=0) without verifying that the path has not been replaced between both operations. Neither O_NOFOLLOW, nor inode comparison, nor post-open fstat() are employed. This allows a local unprivileged user to replace the source file with a symlink pointing to any root-owned file or device during the race window, causing the SUID binary to open and mount it as root. Exploitation requires an /etc/fstab entry with user,loop options whose path points to a directory where the attacker has write permission, and that /usr/bin/mount has the SUID bit set (the default configuration on virtually all Linux distributions). The impact is unauthorized read access to root-protected files and block devices, including backup images, disk volumes, and any file containing a valid filesystem. This issue has been patched in version 2.41.4. (CVE-2026-27456)
- A flaw was found in util-linux. Improper hostname canonicalization in the `login(1)` utility, when invoked with the `-h` option, can modify the supplied remote hostname before setting `PAM_RHOST`. A remote attacker could exploit this by providing a specially crafted hostname, potentially bypassing host-based Pluggable Authentication Modules (PAM) access control rules that rely on fully qualified domain names.
This could lead to unauthorized access. (CVE-2026-3184)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages based on the guidance in TuxCare advisory ALMALINUX9.6:CLSA-2026:1782989143.See Also
Plugin Details
Severity: Medium
ID: 361386
File Name: tuxcare_alma_linux_9.6_CLSA-2026-1782989143.nasl
Version: 1.1
Type: Local
Family: Alma Linux Local Security Checks
Published: 10/1/2026
Updated: 10/1/2026
Supported Sensors: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6
Percentile: 96.69
Vendor
Vendor Severity: Moderate
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.9
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS Score Source: CVE-2026-3184
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/OS/extended-third-party
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 7/2/2026
Vulnerability Publication Date: 3/27/2024
Reference Information
CVE: CVE-2024-28085, CVE-2025-14104, CVE-2026-27456, CVE-2026-3184
CLSA: 2026:1782989143