Unrated severityNVD Advisory· Published Dec 15, 2020· Updated Aug 4, 2024
CVE-2020-29571
CVE-2020-29571
Description
An issue was discovered in Xen through 4.14.x. A bounds check common to most operation time functions specific to FIFO event channels depends on the CPU observing consistent state. While the producer side uses appropriately ordered writes, the consumer side isn't protected against re-ordered reads, and may hence end up de-referencing a NULL pointer. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system. Only Arm systems may be vulnerable. Whether a system is vulnerable depends on the specific CPU. x86 systems are not vulnerable.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
31- Xen/Xendescription
- osv-coords29 versionspkg:rpm/opensuse/xen&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/xen&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/xen&distro=openSUSE%20Tumbleweedpkg:rpm/suse/xen&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/xen&distro=SUSE%20Enterprise%20Storage%205pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP1pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP2pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/xen&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/xen&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/xen&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/xen&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/xen&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
< 4.12.4_06-lp151.2.36.1+ 28 more
- (no CPE)range: < 4.12.4_06-lp151.2.36.1
- (no CPE)range: < 4.13.2_06-lp152.2.21.1
- (no CPE)range: < 4.15.1_01-1.2
- (no CPE)range: < 4.9.4_16-3.80.1
- (no CPE)range: < 4.9.4_16-3.80.1
- (no CPE)range: < 4.10.4_24-3.53.1
- (no CPE)range: < 4.10.4_24-3.53.1
- (no CPE)range: < 4.12.4_06-3.40.1
- (no CPE)range: < 4.13.2_06-3.22.1
- (no CPE)range: < 4.12.4_06-3.40.1
- (no CPE)range: < 4.13.2_06-3.22.1
- (no CPE)range: < 4.4.4_48-61.61.1
- (no CPE)range: < 4.7.6_14-43.73.1
- (no CPE)range: < 4.7.6_14-43.73.1
- (no CPE)range: < 4.9.4_16-3.80.1
- (no CPE)range: < 4.9.4_16-3.80.1
- (no CPE)range: < 4.11.4_16-2.48.1
- (no CPE)range: < 4.12.4_06-3.36.1
- (no CPE)range: < 4.7.6_14-43.73.1
- (no CPE)range: < 4.9.4_16-3.80.1
- (no CPE)range: < 4.11.4_16-2.48.1
- (no CPE)range: < 4.12.4_06-3.36.1
- (no CPE)range: < 4.10.4_24-3.53.1
- (no CPE)range: < 4.12.4_06-3.36.1
- (no CPE)range: < 4.7.6_14-43.73.1
- (no CPE)range: < 4.9.4_16-3.80.1
- (no CPE)range: < 4.11.4_16-2.48.1
- (no CPE)range: < 4.9.4_16-3.80.1
- (no CPE)range: < 4.11.4_16-2.48.1
Patches
Vulnerability mechanics
References
5- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/mitrevendor-advisoryx_refsource_FEDORA
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/mitrevendor-advisoryx_refsource_FEDORA
- security.gentoo.org/glsa/202107-30mitrevendor-advisoryx_refsource_GENTOO
- www.debian.org/security/2020/dsa-4812mitrevendor-advisoryx_refsource_DEBIAN
- xenbits.xenproject.org/xsa/advisory-359.htmlmitrex_refsource_MISC
News mentions
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