SB2020022533 - Fedora 31 update for kernel, kernel-headers, kernel-tools
Published: February 25, 2020 Updated: April 25, 2025
Security Bulletin ID
SB2020022533
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) Buffer overflow (CVE-ID: CVE-2020-9391)
The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.
An issue was discovered in the Linux kernel 5.4 and 5.5 through 5.5.6 on the AArch64 architecture. It ignores the top byte in the address passed to the brk system call, potentially moving the memory break downwards when the application expects it to move upwards, aka CID-dcde237319e6. This has been observed to cause heap corruption with the GNU C Library malloc implementation.
Remediation
Install update from vendor's website.