CVE-2020-29569

An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.
Configurations

Configuration 1 (hide)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 3 (hide)

AND
cpe:2.3:o:netapp:hci_compute_node_bios:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*

Configuration 4 (hide)

OR cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:solidfire_\&_hci_storage_node:-:*:*:*:*:*:*:*

Configuration 5 (hide)

OR cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

History

21 Nov 2024, 05:24

Type Values Removed Values Added
References () https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html - Mailing List, Third Party Advisory () https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html - Mailing List, Third Party Advisory
References () https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html - Mailing List, Third Party Advisory () https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html - Mailing List, Third Party Advisory
References () https://security.gentoo.org/glsa/202107-30 - Third Party Advisory () https://security.gentoo.org/glsa/202107-30 - Third Party Advisory
References () https://security.netapp.com/advisory/ntap-20210205-0001/ - Third Party Advisory () https://security.netapp.com/advisory/ntap-20210205-0001/ - Third Party Advisory
References () https://www.debian.org/security/2021/dsa-4843 - Third Party Advisory () https://www.debian.org/security/2021/dsa-4843 - Third Party Advisory
References () https://xenbits.xenproject.org/xsa/advisory-350.html - Patch, Vendor Advisory () https://xenbits.xenproject.org/xsa/advisory-350.html - Patch, Vendor Advisory

Information

Published : 2020-12-15 17:15

Updated : 2024-11-21 05:24


NVD link : CVE-2020-29569

Mitre link : CVE-2020-29569

CVE.ORG link : CVE-2020-29569


JSON object : View

Products Affected

netapp

  • solidfire_\&_hci_management_node
  • hci_compute_node_bios
  • solidfire_\&_hci_storage_node
  • hci_compute_node

linux

  • linux_kernel

xen

  • xen

debian

  • debian_linux
CWE
CWE-416

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