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SUSE: 2021:1344-1 Important: Linux Kernel Live Patch Fix

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Calendar Grey April 28, 2021
Scroller Suse
SUSE releases an essential patch addressing several vulnerabilities in the Linux Kernel along with guidance for patch management.
An update that fixes four vulnerabilities is now available

Summary

This update for the Linux Kernel 4.12.14-150_63 fixes several issues. The following security issues were fixed: - CVE-2021-3444: Fixed an issue with the bpf verifier which did not properly handle mod32 destination register truncation when the source register was known to be 0 leading to out of bounds read (bsc#1184171). - CVE-2021-28688: Fixed an issue introduced by XSA-365 (bsc##1182294, bsc#1183646). - CVE-2021-26930: Fixed an improper error handling in blkback's grant mapping (XSA-365 bsc#1182294). - CVE-2021-26931: Fixed an issue where Linux kernel was treating grant mapping errors as bugs (XSA-362 bsc#1183022). Patch Instructions: To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

Topics%20covered

Topics Covered

security advisory software update DoS important kernel fix linux kernel live patch

References

#1182294 #1184171

Cross- CVE-2021-26930 CVE-2021-26931 CVE-2021-28688

CVE-2021-3444

CVSS scores:

CVE-2021-26930 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2021-26930 (SUSE): 7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CVE-2021-26931 (NVD) : 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVE-2021-26931 (SUSE): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

CVE-2021-28688 (NVD) : 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

CVE-2021-3444 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2021-3444 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products:

SUSE Linux Enterprise Module for Live Patching 15

SUSE Linux Enterprise Live Patching 12-SP4

Severity
important
Lowest
Low
Medium
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Critical

Announcement ID: SUSE-SU-2021:1344-1
Rating: important

Topics%20covered

Topics Covered

security advisory software update DoS important kernel fix linux kernel live patch

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