Medium severity4.7NVD Advisory· Published Oct 22, 2020· Updated Jun 17, 2026
CVE-2020-27675
CVE-2020-27675
Description
An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. drivers/xen/events/events_base.c allows event-channel removal during the event-handling loop (a race condition). This can cause a use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash via events for an in-reconfiguration paravirtualized device, aka CID-073d0552ead5.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
67- Linux/Linux kerneldescription
- osv-coords64 versionspkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP2pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2012%20SP4pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP1pkg:rpm/suse/kernel-default&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/kernel-default&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP1pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/kernel-livepatch-SLE15-SP1_Update_18&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP1pkg:rpm/suse/kernel-livepatch-SLE15_Update_21&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP1pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP2pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP1pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/kernel-source&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/kernel-source&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP2pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP1pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_17&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4
< 5.3.18-18.24.1+ 63 more
- (no CPE)range: < 5.3.18-18.24.1
- (no CPE)range: < 4.12.14-16.34.1
- (no CPE)range: < 4.12.14-16.34.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-197.67.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-197.67.1
- (no CPE)range: < 4.12.14-197.67.1
- (no CPE)range: < 4.12.14-197.67.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-197.67.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-197.67.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 1-3.3.1
- (no CPE)range: < 1-1.5.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-197.67.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 5.3.18-18.24.1
- (no CPE)range: < 4.12.14-16.34.1
- (no CPE)range: < 4.12.14-16.34.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-197.67.1
- (no CPE)range: < 4.12.14-197.67.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 5.3.18-18.24.1
- (no CPE)range: < 4.12.14-16.34.1
- (no CPE)range: < 4.12.14-16.34.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-197.67.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-95.65.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 4.12.14-197.67.1
- (no CPE)range: < 4.12.14-150.63.1
- (no CPE)range: < 1-6.5.1
Patches
Vulnerability mechanics
References
10- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/nvdPatchVendor Advisory
- github.com/torvalds/linux/commit/073d0552ead5bfc7a3a9c01de590e924f11b5dd2nvdPatchThird Party Advisory
- xenbits.xen.org/xsa/advisory-331.htmlnvdPatchVendor Advisory
- www.openwall.com/lists/oss-security/2021/01/19/3nvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlnvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202011-06nvdThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3ZG6TZLD23QO3PV2AN2HB625ZX47ALTT/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6USZ4APZSBQDHGJLJMHW5JBN4QZV6SKZ/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNF2R7FUT4IOJ2RIRGQ7X5R4F4FVVLSR/nvd
News mentions
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