SB2021052657 - Out-of-bounds read in Linux kernel
Published: May 26, 2021
Security Bulletin ID
SB2021052657
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2021-20177)
The vulnerability allows a local privileged user to perform a denial of service (DoS) attack.
A flaw was found in the Linux kernel's implementation of string matching within a packet. A privileged user (with root or CAP_NET_ADMIN) when inserting iptables rules could insert a rule which can panic the system. Kernel before kernel 5.5-rc1 is affected.
Remediation
Install update from vendor's website.