SB20220111104 - Ubuntu update for linux-oem-5.14

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Main Vulnerability Database SB20220111104

SB20220111104 - Ubuntu update for linux-oem-5.14

Published: January 11, 2022

Security Bulletin ID SB20220111104
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Denial of service

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-2021-4090)

The vulnerability allows a local user to read and manipulate data.

An out-of-bounds (OOB) memory write flaw was found in the NFSD in the Linux kernel. Missing sanity may lead to a write beyond bmval[bmlen-1] in nfsd4_decode_bitmap4 in fs/nfsd/nfs4xdr.c. In this flaw, a local attacker with user privilege may gain access to out-of-bounds memory, leading to a system integrity and confidentiality threat.


2) Out-of-bounds read (CVE-ID: CVE-2021-4204)

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a boundary condition in Linux kernel eBPF. A local user trigger an out-of-bounds read error and read contents of memory on the system or crash the kernel.


Remediation

Install update from vendor's website.

References