SB2022020238 - SUSE update for the Linux Kernel (Live Patch 20 for SLE 12 SP4)
Published: February 2, 2022 Updated: June 28, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Buffer overflow (CVE-ID: CVE-2018-25020)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the BPF subsystem in the Linux kernel in ernel/bpf/core.c and net/core/filter.c. The kernel mishandles situations with a long jump over an instruction sequence
where inner instructions require substantial expansions into multiple
BPF instructions. A local user can run a specially crafted program to trigger memory corruption and execute arbitrary code with elevated privileges.
2) Cryptographic Issues (CVE-ID: CVE-2020-3702)
The vulnerability allows a remote attacker to gain access top sensitive information.
The vulnerability exists due to improper input validation in WIFI driver(Krook). A remote attacker can temporary disable WPA2 or the WPA/WPA2 mixed-mode encryption and intercept traffic in clear text.
3) Buffer overflow (CVE-ID: CVE-2021-42739)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary within the firewire subsystem in the Linux kernel in drivers/media/firewire/firedtv-avc.c and drivers/media/firewire/firedtv-ci.c files. A local privileged user can run a specially crafted program tat calls avc_ca_pmt() function to trigger memory corruption and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.