An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process’s memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222 4.19.177 5.4.99 5.10.17 5.11
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: talos

Published: 2021-08-18T14:37:46

Updated: 2024-08-03T18:23:29.351Z

Reserved: 2021-01-04T00:00:00

Link: CVE-2021-21781

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2021-08-18T15:15:07.733

Modified: 2023-02-03T14:31:55.930

Link: CVE-2021-21781

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-06-25T00:00:00Z

Links: CVE-2021-21781 - Bugzilla