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SUSE: 2021:3718-1 Important: Kernel Patch for eBPF and Overflow Issues

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Calendar Grey November 17, 2021
Scroller Suse
Critical enhancements released for the SUSE Linux Kernel, rectifying significant flaws and vulnerabilities. Discover further information.
An update that fixes two vulnerabilities is now available

Summary

This update for the Linux Kernel 5.3.18-59_13 fixes several issues. The following security issues were fixed: - CVE-2021-34866: Fixed possible eBPF Type Confusion privilege escalation vulnerability via eBPF type confusion (bsc#1191646). - CVE-2021-41864: Fixed an integer overflow with a resultant out-of-bounds write in prealloc_elems_and_freelist in kernel/bpf/stackmap.c (bsc#1191318). 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-SP3-2021-3718=1 SUSE-SLE-Module-Live-Patching-15-SP3-2021-3719=1 Package List:

Topics%20covered

Topics Covered

security advisory privilege escalation kernel patch important integer overflow SUSE eBPF

References

#1191318 #1191646

Cross- CVE-2021-34866 CVE-2021-41864

CVSS scores:

CVE-2021-34866 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2021-41864 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products:

SUSE Linux Enterprise Module for Live Patching 15-SP3

https://www.suse.com/security/cve/CVE-2021-34866.html

https://www.suse.com/security/cve/CVE-2021-41864.html

https://bugzilla.suse.com/1191318

https://bugzilla.suse.com/1191646

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2021:3718-1
Rating: important

Topics%20covered

Topics Covered

security advisory privilege escalation kernel patch important integer overflow SUSE eBPF

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