Security update for the Linux Kernel (Live Patch 15 for SLE 15 SP2)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 15 for SLE 15 SP2)
Announcement ID: SUSE-SU-2021:4090-1
Rating: important
References: #1191813 #1192048
Cross-References:CVE-2021-0941 CVE-2021-20322
Affected Products:
  • SUSE Linux Enterprise Module for Live Patching 15-SP2

An update that fixes two vulnerabilities is now available.

Description:

This update for the Linux Kernel 5.3.18-24_53_4 fixes several issues.
The following security issues were fixed:

  • CVE-2021-0941: In bpf_skb_change_head of filter.c, there is a possible out of bounds read due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation (bnc#1192045).
  • CVE-2021-20322: Make the ipv4 and ipv6 ICMP exception caches less predictive to avoid information leaks about UDP ports in use. (bsc#1191790)

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-SP2:
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP2-2021-4086=1 SUSE-SLE-Module-Live-Patching-15-SP2-2021-4089=1 SUSE-SLE-Module-Live-Patching-15-SP2-2021-4090=1 SUSE-SLE-Module-Live-Patching-15-SP2-2021-4091=1 SUSE-SLE-Module-Live-Patching-15-SP2-2021-4092=1

Package List:

  • SUSE Linux Enterprise Module for Live Patching 15-SP2 (ppc64le s390x x86_64):
    • kernel-livepatch-5_3_18-24_43-default-14-2.2
    • kernel-livepatch-5_3_18-24_43-default-debuginfo-14-2.2
    • kernel-livepatch-5_3_18-24_46-default-14-2.2
    • kernel-livepatch-5_3_18-24_46-default-debuginfo-14-2.2
    • kernel-livepatch-5_3_18-24_49-default-13-2.2
    • kernel-livepatch-5_3_18-24_49-default-debuginfo-13-2.2
    • kernel-livepatch-5_3_18-24_52-default-12-2.2
    • kernel-livepatch-5_3_18-24_52-default-debuginfo-12-2.2
    • kernel-livepatch-5_3_18-24_53_4-default-7-2.1
    • kernel-livepatch-5_3_18-24_53_4-default-debuginfo-7-2.1
    • kernel-livepatch-SLE15-SP2_Update_10-debugsource-13-2.2
    • kernel-livepatch-SLE15-SP2_Update_11-debugsource-12-2.2
    • kernel-livepatch-SLE15-SP2_Update_15-debugsource-7-2.1
    • kernel-livepatch-SLE15-SP2_Update_8-debugsource-14-2.2
    • kernel-livepatch-SLE15-SP2_Update_9-debugsource-14-2.2

References: