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Synthesis of the vulnerability 


An attacker can force the usage of a freed memory area via IORING_OP_MADVISE of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Vulnerable systems: Linux.
Severity of this threat: 2/4.
Creation date: 08/05/2020.
Références of this weakness: PROJ-ZERO-2029, VIGILANCE-VUL-32216.

Description of the vulnerability 


An attacker can force the usage of a freed memory area via IORING_OP_MADVISE of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Full bulletin, software filtering, emails, fixes, … (Request your free trial)

This computer vulnerability impacts software or systems such as Linux.

Our Vigil@nce team determined that the severity of this weakness bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this weakness.

Solutions for this threat 


Linux kernel: version 5.6.8.
The version 5.6.8 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.6.8.tar.xz

Linux kernel: patch for IORING_OP_MADVISE.
A patch is indicated in information sources.
Full bulletin, software filtering, emails, fixes, … (Request your free trial)

Computer vulnerabilities tracking service 


Vigil@nce provides cybersecurity bulletins. The Vigil@nce vulnerability database contains several thousand vulnerabilities.





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