CVE-2023-1295 Privilege escalation with IO_RING_OP_CLOSE in the Linux Kernel

A time-of-check to time-of-use issue exists in iouring subsystem's IORINGOPCLOSE operation in the Linux kernel's versions 5.6 - 5.11 inclusive, which allows a local user to elevate their privileges to root. Introduced in b5dba59e0cf7e2cc4d3b3b1ac5fe81ddf21959eb, patched in...

UBUNTU-CVE-2023-2236

A use-after-free vulnerability in the Linux Kernel iouring subsystem can be exploited to achieve local privilege escalation. Both ioinstallfixedfile and its callers call fput in a file in case of an error, causing a reference underflow which leads to a use-after-free vulnerability. We recommend...

DEBIAN-CVE-2023-1872

A use-after-free vulnerability in the Linux Kernel iouring system can be exploited to achieve local privilege escalation. The iofilegetfixed function lacks the presence of ctx-uringlock which can lead to a Use-After-Free vulnerability due a race condition with fixed files getting unregistered. We...

UBUNTU-CVE-2023-1872

A use-after-free vulnerability in the Linux Kernel iouring system can be exploited to achieve local privilege escalation. The iofilegetfixed function lacks the presence of ctx-uringlock which can lead to a Use-After-Free vulnerability due a race condition with fixed files getting unregistered. We...

CVE-2023-0240 Use after free in io_uring in the Linux Kernel

There is a logic error in iouring's implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the ioprepasyncwork function the assumption that the last iograbidentity call cannot return false is not true, and in this case the function will use...

CVE-2022-3910 Use after free in IO_uring in the Linux Kernel

Use After Free vulnerability in Linux Kernel allows Privilege Escalation. An improper Update of Reference Count in iouring leads to Use-After-Free and Local Privilege Escalation. When iomsgring was invoked with a fixed file, it called iofputfile which improperly decreased its reference count...