CVE-2026-39461

libcasper3 communicates with helper processes via UNIX domain sockets, and uses the select2 system call to wait for data to become available. However, it does not verify that its socket descriptor fits within select2's descriptor set size limit of FDSETSIZE 1024. An attacker able to cause an...

binary-exploitation-labs-Application-security-ctf-writeups

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Linux Kernel FD-Race Monitoring

This C program is a defensive process-monitoring utility, not a privilege-escalation exploit. It continuously inspects /proc/pid/fd to detect suspicious activity related to excessive file descriptor usage, activity from sensitive SUID binaries, and potential file descriptor leakage or theft...

RockyLinux 10 : systemd (RLSA-2026:18153)

The remote RockyLinux 10 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:18153 advisory. systemd-coredump: race condition that allows a local attacker to crash a SUID program and gain read access to the resulting core dump CVE-2025-4598 Tenable has...

CVE-2026-41163

A flaw was found in bubblewrap when operating in setuid mode. A local user may use ptrace to interfere with the sandbox setup process and gain access to privileged operations that are normally restricted. This could allow an attacker to bypass intended sandboxing restrictions and potentially...

SUSE-SU-2026:21875-1 Security update for openssh

This update for openssh fixes the following issues - CVE-2026-35385: a file downloaded by scp may be installed setuid or setgid bsc1261427. - CVE-2026-35414: mishandling of authorizedkeys principals option bsc1261430. Changes for openssh: - Fix a potential issue when validating mac bsc1264568:...

CLSA-2026-1779368297 polkit: Fix of CVE-2026-4897

CVE-2026-4897: Fix unbounded stdin reads that allow local user to trigger OOM and DoS in setuid helper; add input length checks and limit allocations...

USN-8288-1: Bubblewrap vulnerability

It was discovered that Bubblewrap incorrectly handled the sandbox setup phase when installed in setuid mode. A local attacker could possibly use this issue to bypass sandbox restrictions...

Astra Linux - уязвимость в golang-1.19

On Unix platforms, the Go runtime behaves differently when a binary is run with the setuid/setgid bits enabled. This can be dangerous in certain situations, such as when dumping memory state or assuming the status of standard I/O file descriptors. If a setuid/setgid binary is executed with standa...

Astra Linux - уязвимость в zsh

In Zsh before version 5.8, attackers who were able to execute commands could regain privileges lost due to the --no-PRIVILEGED option. Zsh failed to overwrite the saved user ID, so the original privileges could be restored by executing MODULEPATH=/dir/with/module zmodload with a module that calls...

Astra Linux - уязвимость в glibc

A flaw was discovered in glibc. A “off-by-one” buffer overflow and underflow in the getcwd function may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and the size passed to getcwd in a setuid program could exploit this flaw t...

Astra Linux - уязвимость в glibc

On the x86-64 architecture, the GNU C Library also known as glibc prior to version 2.31 fails to ignore the LDPREFERMAP32BITEXEC environment variable during program execution after a security transition. This allows local attackers to restrict the possible mapping addresses for loaded libraries,...

Astra Linux - уязвимость в glibc

A vulnerable environment variable in the Untrusted LDLIBRARYPATH setting in the GNU C Library, versions 2.27 to 2.38, allows attackers to control the loading of dynamically shared libraries in statically compiled setuid binaries that call dlopen including internal dlopen calls after setlocale or...

Astra Linux - уязвимость в linux, linux-5.10, linux-5.15

A flaw was discovered in the Linux kernel, where unauthorized access to the execution of the setuid file with specific capabilities was detected within the OverlayFS subsystem of the Linux kernel. This issue occurs when a user copies a file with capabilities from a nosuid mount to another mount...

Astra Linux - уязвимость в screen

The socket.c file in GNU Screen, as of version 4.9.0, can be executed with the setuid or setgid flags the default on platforms like Arch Linux and FreeBSD. This allows local users to send a privileged SIGHUP signal to any process ID, potentially causing a denial of service or disrupting the targe...

Astra Linux - уязвимость в containerd

Containerd is an open-source container runtime that emphasizes simplicity, robustness, and portability. A bug was discovered in Containerd where container root directories and certain plugins had insufficiently restricted permissions, allowing unprivileged Linux users to access the contents of...

Astra Linux - уязвимость в ntfs-3g

A buffer overflow was discovered in NTFS-3G before October 3, 2022. Metadata created within an NTFS image can lead to code execution. A local attacker can exploit this vulnerability if the ntfs-3g binary has the setuid root privilege. An attacker who is physically nearby can also exploit this...

Astra Linux - уязвимость в shadow

A vulnerability was discovered in Shadow 4.5. The newgidmap function part of shadow-utils is setuid, allowing an unprivileged user to be placed in a user namespace where setgroups2 is allowed. This enables an attacker to remove themselves from a supplementary group, potentially granting them acce...

sudo: Sudo: Privilege escalation due to failure in privilege drop calls

A flaw was found in Sudo. A local user could exploit a failure in the setuid, setgid, or setgroups calls, which are used to drop privileges before running the mailer. This oversight allows for privilege escalation, enabling the user to gain elevated access on the system...

sudo: Sudo: Privilege escalation due to failure in privilege drop calls

A flaw was found in Sudo. A local user could exploit a failure in the setuid, setgid, or setgroups calls, which are used to drop privileges before running the mailer. This oversight allows for privilege escalation, enabling the user to gain elevated access on the system...