A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively long input to the polkit-agent-helper-1 setuid binary via standard input (stdin). This unbounded input can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system.

It was reported that when executing a program via "pkexec --user nonpriv program", the nonpriv session can escape to the parent session by using the TIOCSTI ioctl to push characters into the terminal's input buffer, allowing privilege escalation.

Original bug report (contains reproducer):

https://bugzilla.redhat.com/showbug.cgi?id=1299955

A local attacker with /dev/uinput access can inject arbitrary udev properties through the libinput-device-group helper. Depending on downstream udev rules, this can result in root code execution (e.g. via injected REMOVECMD properties executed at device removal time). REMOVECMD is in the default udev rules and expected to be present on virtually all machines.

A flaw was found in libinput. A local attacker who can place a specially crafted Lua bytecode file in certain system or user configuration directories can bypass security restrictions. This allows the attacker to run unauthorized code with the same permissions as the program using libinput, such as a graphical compositor. This could lead to the attacker monitoring keyboard input and sending that information to an external location.

A flaw was found in the udisks storage management daemon that exposes a privileged D-Bus API for restoring LUKS encryption headers without proper authorization checks. The issue allows a local unprivileged user to instruct the root-owned udisks daemon to overwrite encryption metadata on block devices. This can permanently invalidate encryption keys and render encrypted volumes inaccessible. Successful exploitation results in a denial-of-service condition through irreversible data loss.

An issue in the pdfseparate utility of freedesktop poppler v25.04.0 allows attackers to cause an infinite recursion via supplying a crafted PDF file. This can lead to a Denial of Service (DoS).

A flaw was found in the Poppler's Pdfinfo utility. This issue occurs when using -dests parameter with pdfinfo utility. By using certain malformed input files, an attacker could cause the utility to crash, leading to a denial of service.

An assertion failure in dbus-daemon when a privileged Monitoring connection (dbus-monitor, busctl monitor, gdbus monitor or similar) is active, and a message from the bus driver cannot be delivered to a client connection due to <deny> rules or outgoing message quota. This is a denial of service if triggered maliciously by a local attacker

In other words, if a privileged user with control over the dbus-daemon is using the org.freedesktop.DBus.Monitoring interface to monitor message bus traffic, then an unprivileged user with the ability to connect to the same dbus-daemon can cause a dbus-daemon crash under some circumstances.

Vulnerable versions:

1.15.x before 1.15.6 1.14.x before 1.14.8 1.12.x before 1.12.28 most end-of-life versions since 1.9.x

Fixed versions:

all since 1.15.6 1.14.x since 1.14.8 1.12.x since 1.12.28

Not vulnerable: end-of-life versions 1.8.x or older do not contain the affected code path.

https://gitlab.freedesktop.org/dbus/dbus/-/issues/457 https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1908636.html

When xdg-mail is configured to use thunderbird for mailto URLs, improper parsing of the URL can lead to additional headers being passed to thunderbird that should not be included per RFC 2368. An attacker can use this method to create a mailto URL that looks safe to users, but will actually attach files when clicked.

An issue was discovered in D-Bus before 1.12.24, 1.13.x and 1.14.x before 1.14.4, and 1.15.x before 1.15.2. An authenticated attacker can cause dbus-daemon and other programs that use libdbus to crash when receiving a message with certain invalid type signatures.

An issue was discovered in D-Bus before 1.12.24, 1.13.x and 1.14.x before 1.14.4, and 1.15.x before 1.15.2. An authenticated attacker can cause dbus-daemon and other programs that use libdbus to crash by sending a message with attached file descriptors in an unexpected format.

An issue was discovered in D-Bus before 1.12.24, 1.13.x and 1.14.x before 1.14.4, and 1.15.x before 1.15.2. An authenticated attacker can cause dbus-daemon and other programs that use libdbus to crash when receiving a message where an array length is inconsistent with the size of the element type.

A flaw was found in the gstreamer h264 component of gst-plugins-bad before v1.18.1 where when parsing a h264 header, an attacker could cause the stack to be smashed, memory corruption and possibly code execution.

CoreGraphics. An integer overflow was addressed with improved input validation.

Integer overflow in the vrendcreateshader function in vrendrenderer.c in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (process crash) via crafted pktlength and offlen values, which trigger an out-of-bounds access.

Stack-based buffer overflow in udisks before 1.0.5 and 2.x before 2.1.3 allows local users to cause a denial of service (crash) and possibly execute arbitrary code via a long mount point.

Poppler was recently reported to be vulnerable to a flaw, which can be exploited by malicious people to cause a DoS (Denial of Service) in an application using the library.

The vulnerability is caused due to a format string error when handling extraneous bytes within a segment in the "JBIG2Stream::readSegments()" method in JBIG2Stream.cc, which can be exploited to cause a crash.

The issue is said to be fixed in Poppler 0.24.5.

References: https://bugs.gentoo.org/showbug.cgi?id=496770 https://bugs.kde.org/showbug.cgi?id=328511 (okular)

Commit: http://cgit.freedesktop.org/poppler/poppler/commit/?id=58e04a08afee39370283c494ee2e4e392fd3b684

Interaction error in xdg-open allows remote attackers to execute arbitrary code by sending a file with a dangerous MIME type but using a safe type that Firefox sends to xdg-open, which causes xdg-open to process the dangerous file type through automatic type detection, as demonstrated by overwriting the .desktop file.

An issue was discovered in GStreamer gst-plugins-good before 1.28.2. When parsing MP4 audio tracks, the isomp4 plugin's qtdemuxaudiocaps function does not sufficiently validate atom data before performing division operations, leading to denial of service due to integer division by zero.

An issue was discovered in GStreamer gst-plugins-good before 1.28.2. When parsing MP4 audio tracks, the isomp4 plugin's qtdemuxparsetrak function does not sufficiently validate atom data before performing division operations, leading to denial of service due to integer division by zero.

Last updated 25 August 2025

The openTempFile function in goo/gfile.cc in Xpdf and Poppler 0.24.3 and earlier, when running on a system other than Unix, allows local users to overwrite arbitrary files via a symlink attack on temporary files with predictable names.

An incomplete fix for CVE-2024-47778 allows an out-of-bounds read in gstwavparseadtlchunk() function. The patch added a size validation check lsize + 8 > size, but it does not account for the GSTROUNDUP2(lsize) used in the actual offset calculation. When lsize is an odd number, the parser advances more bytes than validated, causing OOB read.

pkexec.c in pkexec in libpolkit in PolicyKit 0.96 allows local users to determine the existence of arbitrary files via the argument.

Bastian Blank reported: [1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=576687

an information leak in the way udisks's disks and storage device management daemon passed sensitive device mapper table information to userspace processes via the udev interface. Local attacker could use this flaw to conduct subsequent unauthorized operations on storage device(s), which should be otherwise protected by encryption / luks passphrase knowledge.

Upstream bug report: [2] https://bugs.freedesktop.org/showbug.cgi?id=27494

Upstream patch: [3] http://cgit.freedesktop.org/udisks/commit/?id=0fcc7cb3b66f23fac53ae08647aa0007a2bd56c4

References: [4] https://bugzilla.novell.com/showbug.cgi?id=594261

CVE Request: [5] http://www.openwall.com/lists/oss-security/2010/04/06/5

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

Last updated 8 April 2025

A flaw was found in libinput. An attacker capable of deploying a Lua plugin file in specific system directories can exploit a dangling pointer vulnerability. This occurs when a garbage collection cleanup function is called, leaving a pointer that can then be printed to system logs. This could potentially expose sensitive data if the memory location is re-used, leading to information disclosure. For this exploit to work, Lua plugins must be enabled in libinput and loaded by the compositor.

A flaw was discovered in dbus where the implementation of DBUSCOOKIESHA1 is susceptible to a symbolic link attack. A malicious client with write access to its own home directory could manipulate a ~/.dbus-keyrings symlink to cause the DBusServer to read and write in unintended locations. This could result in authentication bypass.

Poppler is a PDF rendering library. Versions prior to 25.06.0 use std::atomicint for reference counting. Because std::atomicint is only 32 bits, it is possible to overflow the reference count and trigger a use-after-free. Version 25.06.0 patches the issue.