SUSE-SU-2021:0740-1

    Dashboard / Vulnerabilities / SUSE-SU-2021:0740-1

    SUSE-SU-2021:0740-1

    Published: 9 Mar 2021Last Modified: 4 Feb 2026

    Summary: Security update for the Linux Kernel

    Details: The SUSE Linux Enterprise 15 kernel was updated to receive various security and bugfixes. The following security bugs were fixed: - CVE-2021-26930: Fixed an improper error handling in blkback's grant mapping (XSA-365 bsc#1181843). - CVE-2021-26931: Fixed an issue where Linux kernel was treating grant mapping errors as bugs (XSA-362 bsc#1181753). - CVE-2021-26932: Fixed improper error handling issues in Linux grant mapping (XSA-361 bsc#1181747). by remote attackers to read or write files via directory traversal in an XCOPY request (bsc#178372). - CVE-2020-29368,CVE-2020-29374: Fixed an issue in copy-on-write implementation which could have granted unintended write access because of a race condition in a THP mapcount check (bsc#1179660, bsc#1179428). The following non-security bugs were fixed: - kernel-{binary,source}.spec.in: do not create loop symlinks (bsc#1179082) - kernel-source.spec: Fix build with rpm 4.16 (boo#1179015). - rpm/kernel-binary.spec.in: avoid using barewords (bsc#1179014) - rpm/kernel-binary.spec.in: avoid using more barewords (bsc#1179014) %split_extra still contained two. - rpm/kernel-binary.spec.in: Fix compressed module handling for in-tree KMP (jsc#SLE-10886) The in-tree KMP that is built with SLE kernels have a different scriptlet that is embedded in kernel-binary.spec.in rather than *.sh files. - rpm/kernel-binary.spec.in: use grep -E instead of egrep (bsc#1179045) egrep is only a deprecated bash wrapper for 'grep -E'. So use the latter instead. - rpm/kernel-module-subpackage: make Group tag optional (bsc#1163592) - rpm/kernel-obs-build.spec.in: Add -q option to modprobe calls (bsc#1178401) - rpm/kernel-{source,binary}.spec: do not include ghost symlinks (boo#1179082). - rpm/mkspec: do not build kernel-obs-build on x86_32 We want to use 64bit kernel due to various bugs (bsc#1178762 to name one). - rpm/post.sh: Avoid purge-kernel for the first installed kernel (bsc#1180058) - xen/netback: avoid race in xenvif_rx_ring_slots_available() (bsc#1065600). - xen/netback: fix spurious event detection for common event case (bsc#1182175).

    References: https://www.suse.com/support/update/announcement/2021/suse-su-20210740-1/, https://bugzilla.suse.com/1065600, https://bugzilla.suse.com/1163592, https://bugzilla.suse.com/1178401, https://bugzilla.suse.com/1178762, https://bugzilla.suse.com/1179014, https://bugzilla.suse.com/1179015, https://bugzilla.suse.com/1179045, https://bugzilla.suse.com/1179082, https://bugzilla.suse.com/1179428, https://bugzilla.suse.com/1179660, https://bugzilla.suse.com/1180058, https://bugzilla.suse.com/1181747, https://bugzilla.suse.com/1181753, https://bugzilla.suse.com/1181843, https://bugzilla.suse.com/1182140, https://bugzilla.suse.com/1182175, https://www.suse.com/security/cve/CVE-2020-29368, https://www.suse.com/security/cve/CVE-2020-29374, https://www.suse.com/security/cve/CVE-2021-26930, https://www.suse.com/security/cve/CVE-2021-26931, https://www.suse.com/security/cve/CVE-2021-26932

    Affected packages

    Package

    Name: kernel-default

    Purl: pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.12.14-150.69.1

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    SUSE-SU-2021:0740-1 | CVE-DB