CVE-2024-53096

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

mm: resolve faulty mmap_region() error path behaviour

The mmap_region() function is somewhat terrifying, with spaghetti-like

control flow and numerous means by which issues can arise and incomplete

state, memory leaks and other unpleasantness can occur.

A large amount of the complexity arises from trying to handle errors late

in the process of mapping a VMA, which forms the basis of recently

observed issues with resource leaks and observable inconsistent state.

Taking advantage of previous patches in this series we move a number of

checks earlier in the code, simplifying things by moving the core of the

logic into a static internal function __mmap_region().

Doing this allows us to perform a number of checks up front before we do

any real work, and allows us to unwind the writable unmap check

unconditionally as required and to perform a CONFIG_DEBUG_VM_MAPLE_TREE

validation unconditionally also.

We move a number o

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References