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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.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.
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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:*:*:*:*:*:*:*
Changed
CPE Configuration
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
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
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
CPE Configuration
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
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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