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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
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.
Metrics
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vector strings. CVSS information contributed by other sources is also
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OR
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.1.44 up to (excluding) 4.2
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.4.80 up to (excluding) 4.4.254
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.9.36 up to (excluding) 4.9.249
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.11.9 up to (excluding) 4.12
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from
Modified Analysis by NIST4/26/2022 12:12:19 PM
Action
Type
Old Value
New Value
Changed
Reference Type
https://security.gentoo.org/glsa/202107-30 No Types Assigned
https://security.gentoo.org/glsa/202107-30 Third Party Advisory
OR
*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (including) 5.10.1
OR
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (including) 5.10.1
Changed
CPE Configuration
OR
*cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions up to (including) 4.14.0
OR
*cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions up to (including) 4.14.1
Added
CPE Configuration
OR
*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Changed
Reference Type
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html No Types Assigned
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html Mailing List, Third Party Advisory
OR
*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (including) 5.10.1
OR
*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (including) 5.10.1
Added
CPE Configuration
AND
OR
*cpe:2.3:o:netapp:hci_compute_node_bios:-:*:*:*:*:*:*:*
OR
cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*
Added
CPE Configuration
OR
*cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*
*cpe:2.3:a:netapp:solidfire_\&_hci_storage_node:-:*:*:*:*:*:*:*
Changed
Reference Type
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html No Types Assigned
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html Mailing List, Third Party Advisory
Changed
Reference Type
https://security.netapp.com/advisory/ntap-20210205-0001/ No Types Assigned
https://security.netapp.com/advisory/ntap-20210205-0001/ Third Party Advisory
Changed
Reference Type
https://www.debian.org/security/2021/dsa-4843 No Types Assigned
https://www.debian.org/security/2021/dsa-4843 Third Party Advisory
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