SB2021042858 - SUSE update for the Linux Kernel (Live Patch 23 for SLE 15 SP1)

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Main Vulnerability Database SB2021042858

SB2021042858 - SUSE update for the Linux Kernel (Live Patch 23 for SLE 15 SP1)

Published: April 28, 2021

Security Bulletin ID SB2021042858
Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Out-of-bounds write (CVE-ID: CVE-2021-28660)

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the "rtw_wx_set_scan" in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c. A local user can trigger out-of-bounds write and execute arbitrary code on the target system.


2) Improper Initialization (CVE-ID: CVE-2021-28688)

The vulnerability allows a local user to perform a denial of service attack.

The vulnerability exists due to improper initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. A local user can perform a denial of service attack.


3) Out-of-bounds read (CVE-ID: CVE-2021-3444)

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to an out-of-bounds read error within the fixup_bpf_calls() function in kernel/bpf/verifier.c. A local user can execute arbitrary code.


Remediation

Install update from vendor's website.

References