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Oracle Linux: (CVE-2021-21781) ELSA-2022-1988: kernel security, bug fix, and enhancement update

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Oracle Linux: (CVE-2021-21781) ELSA-2022-1988: kernel security, bug fix, and enhancement update

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
08/10/2021
Created
05/20/2022
Added
05/18/2022
Modified
05/18/2022

Description

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

Solution(s)

  • oracle-linux-upgrade-kernel

References

  • ELSA-2022-1988
  • CVE-2021-21781

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