Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP3)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP3)
Announcement ID: SUSE-SU-2021:3360-1
Rating: important
References: #1187054 #1188613 #1190118 #1190127
Cross-References:CVE-2021-31440 CVE-2021-3573 CVE-2021-3640 CVE-2021-38160
Affected Products:
  • SUSE Linux Enterprise Module for Live Patching 15-SP3

An update that fixes four vulnerabilities is now available.

Description:

This update for the Linux Kernel 5.3.18-57 fixes several issues.
The following security issues were fixed:

  • CVE-2021-31440: Fixed a lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. (bsc#1190127).
  • CVE-2021-38160: Fixed a bug that could lead to a data corruption or loss. This can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size in drivers/char/virtio_console.c (bsc#1190118)
  • CVE-2021-3640: Fixed a user-after-free bug in the function sco_sock_sendmsg which could lead to local privilege escalation. (bsc#1188613)
  • CVE-2021-3573: Fixed a user-after-free bug in the function hci_sock_bound_ioctl which could lead to local privilege escalation. (bsc#1187054).

Patch Instructions:

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Enterprise Module for Live Patching 15-SP3:
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP3-2021-3360=1

Package List:

  • SUSE Linux Enterprise Module for Live Patching 15-SP3 (ppc64le s390x x86_64):
    • kernel-livepatch-5_3_18-57-default-7-3.1
    • kernel-livepatch-5_3_18-57-default-debuginfo-7-3.1
    • kernel-livepatch-SLE15-SP3_Update_0-debugsource-7-3.1

References: