CVE-2023-23586

A use-after-free vulnerability was discovered in the Linux kernel's iouring subsystem. It was found that it is possible to insert a time namespace's vvar page to process memory space via a page fault. When this time namespace is destroyed, the vvar page is also freed, but not removed from the...

K84602160: Linux kernel vulnerability CVE-2021-3491

Security Advisory Description The iouring subsystem in the Linux kernel allowed the MAXRWCOUNT limit to be bypassed in the PROVIDEBUFFERS operation, which led to negative values being usedin memrw when reading /proc//mem. This could be used to create a heap overflow leading to arbitrary code...

CVE-2023-23586

Due to a vulnerability in the iouring subsystem, it is possible to leak kernel memory information to the user process. timensinstall calls currentissinglethreaded to determine if the current process is single-threaded, but this call does not consider iouring's ioworker threads, thus it is possibl...

DEBIAN-CVE-2023-23586

Due to a vulnerability in the iouring subsystem, it is possible to leak kernel memory information to the user process. timensinstall calls currentissinglethreaded to determine if the current process is single-threaded, but this call does not consider iouring's ioworker threads, thus it is possibl...

CVE-2023-23586 Use after free in io_uring in the Linux Kernel

Due to a vulnerability in the iouring subsystem, it is possible to leak kernel memory information to the user process. timensinstall calls currentissinglethreaded to determine if the current process is single-threaded, but this call does not consider iouring's ioworker threads, thus it is possibl...

The vulnerability of the io_install_fixed_file() function in the io_uring/filetable.c module of the io_uring subsystem in the Linux kernel allows a hacker to cause a service failure.

The vulnerability of the ioinstallfixedfile function in the iouring/filetable.c module of the iouring subsystem in the Linux kernel is related to the use of previously freed memory. Exploiting this vulnerability could allow an attacker to cause a service failure...

Exploit for Use After Free in Linux Linux_Kernel

CVE-2022-2602-Kernel-Exploit Details https://blog.hacktives...

LSN-0090-1: Kernel Live Patch Security Notice

David Bouman discovered that the netfilter subsystem in the Linux kernel did not properly validate passed user register indices. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. CVE-2022-1015 David Bouman and Billy Jheng Bing Jhong discovered that a...

USN-5706-1: Linux kernel (Azure CVM) vulnerabilities

It was discovered that the BPF verifier in the Linux kernel did not properly handle internal data structures. A local attacker could use this to expose sensitive information kernel memory. CVE-2021-4159 It was discovered that an out-of-bounds write vulnerability existed in the Video for Linux 2...

Privilege Escalation

linux is vulnerable to privilege escalation. The vulnerability exists because of a race condition existed in the iouring subsystem which allows a local attacker to execute code on the affected systems with elevated privileges...

USN-5683-1: Linux kernel (IBM) vulnerabilities

It was discovered that the framebuffer driver on the Linux kernel did not verify size limits when changing font or screen size, leading to an out-of- bounds write. A local attacker could use this to cause a denial of service system crash or possibly execute arbitrary code. CVE-2021-33655 Selim En...

USN-5682-1: Linux kernel (AWS) vulnerabilities

It was discovered that the BPF verifier in the Linux kernel did not properly handle internal data structures. A local attacker could use this to expose sensitive information kernel memory. CVE-2021-4159 It was discovered that an out-of-bounds write vulnerability existed in the Video for Linux 2...

USN-5677-1: Linux kernel vulnerabilities

It was discovered that the BPF verifier in the Linux kernel did not properly handle internal data structures. A local attacker could use this to expose sensitive information kernel memory. CVE-2021-4159 It was discovered that an out-of-bounds write vulnerability existed in the Video for Linux 2...

CVE-2022-1786

A use-after-free flaw was found in the Linux kernel’s iouring subsystem in the way a user sets up a ring with IORINGSETUPIOPOLL with more than one task completing submissions on this ring. This flaw allows a local user to crash or escalate their privileges on the system...

CVE-2022-1786

A use-after-free flaw was found in the Linux kernel’s iouring subsystem in the way a user sets up a ring with IORINGSETUPIOPOLL with more than one task completing submissions on this ring. This flaw allows a local user to crash or escalate their privileges on the system...

Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2022-9426)

The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2022-9426 advisory. - iouring: always use original task when preparing req identity Jens Axboe Orabug: 34186552 CVE-2022-1786 Tenable has extracted the preceding...

USN-5092-1 linux, linux-aws, linux-aws-5.11, linux-gcp, linux-kvm, linux-oracle, linux-raspi vulnerabilities

Valentina Palmiotti discovered that the iouring subsystem in the Linux kernel could be coerced to free adjacent memory. A local attacker could use this to execute arbitrary code. CVE-2021-41073 Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in...

CVE-2021-3491

The iouring subsystem in the Linux kernel allowed the MAXRWCOUNT limit to be bypassed in the PROVIDEBUFFERS operation, which led to negative values being usedin memrw when reading /proc//mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was...

CVE-2021-3491

CVE-2021-3491 concerns the Linux kernel io_uring PROVIDE_BUFFERS path, where the MAX_RW_COUNT limit could be bypassed, causing negative values to be used in mem_rw during /proc//mem reads. This could enable a heap overflow and potential arbitrary code execution in the kernel. The issue was addres...

CVE-2021-3491 Linux kernel io_uring PROVIDE_BUFFERS MAX_RW_COUNT bypass

The iouring subsystem in the Linux kernel allowed the MAXRWCOUNT limit to be bypassed in the PROVIDEBUFFERS operation, which led to negative values being usedin memrw when reading /proc//mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was...