SB2021031732 - SUSE update for the Linux Kernel (Live Patch 10 for SLE 15 SP2) 

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Main Vulnerability Database SB2021031732

SB2021031732 - SUSE update for the Linux Kernel (Live Patch 10 for SLE 15 SP2)

Published: March 17, 2021

Security Bulletin ID SB2021031732
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Out-of-bounds write (CVE-ID: CVE-2020-29368)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when processing untrusted input within the __split_huge_pmd() function in mm/huge_memory.c in the Linux kernel. A local user can abuse the copy-on-write implementation and gain unintended write access because of a race condition in a THP mapcount check.



2) Security restrictons bypass (CVE-ID: CVE-2020-29373)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists in fs/io_uring.c in the Linux kernel due to insecure handling of the root directory during path lookups. A process inside a mount namespace can escape to unintended filesystem locations and read sensitive information.


Remediation

Install update from vendor's website.

References