An exploitable vulnerability exists in the grsecurity PaX patch for the function read_kmem, in PaX from version pax-linux-4.9.8-test1 to 4.9.24-test7, grsecurity official from version grsecurity-3.1-4.9.8-201702060653 to grsecurity-3.1-4.9.24-201704252333, grsecurity unofficial from version v4.9.25-unofficialgrsec to v4.9.74-unofficialgrsec. PaX adds a temp buffer to the read_kmem function, which is never freed when an invalid address is supplied. This results in a memory leakage that can lead to a crash of the system. An attacker needs to induce a read to /dev/kmem using an invalid address to exploit this vulnerability.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: talos

Published: 2019-10-31T20:15:40

Updated: 2024-08-04T19:40:48.969Z

Reserved: 2019-01-04T00:00:00

Link: CVE-2019-5023

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2019-10-31T21:15:13.373

Modified: 2022-06-07T18:41:22.710

Link: CVE-2019-5023

cve-icon Redhat

No data.