CVE-2021-26932
First published: Wed Feb 17 2021(Updated: )
An issue was discovered in the Linux kernel 3.2 through 5.10.16, as used by Xen. Grant mapping operations often occur in batch hypercalls, where a number of operations are done in a single hypercall, the success or failure of each one is reported to the backend driver, and the backend driver then loops over the results, performing follow-up actions based on the success or failure of each operation. Unfortunately, when running in PV mode, the Linux backend drivers mishandle this: Some errors are ignored, effectively implying their success from the success of related batch elements. In other cases, errors resulting from one batch element lead to further batch elements not being inspected, and hence successful ones to not be possible to properly unmap upon error recovery. Only systems with Linux backends running in PV mode are vulnerable. Linux backends run in HVM / PVH modes are not vulnerable. This affects arch/*/xen/p2m.c and drivers/xen/gntdev.c.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=3.2<=5.10.16 | |
| Fedoraproject Fedora | =32 | |
| Fedoraproject Fedora | =33 | |
| Debian Debian Linux | =9.0 | |
| Netapp Cloud Backup | ||
| Netapp Solidfire\, Enterprise Sds \& Hci Storage Node | ||
| Netapp Solidfire \& Hci Management Node | ||
| Netapp Hci Compute Node | ||
| All of | ||
| Netapp Hci H410c Firmware | ||
| Netapp Hci H410c | ||
| Netapp Hci H410c Firmware | ||
| Netapp Hci H410c |
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Reference Links
- http://xenbits.xen.org/xsa/advisory-361.html
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
- https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2XQR52ICKRK3GC4HDWLMWF2U55YGAR63/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GWQWPWYZRXVFJI5M3VCM72X27IB7CKOB/
- https://security.netapp.com/advisory/ntap-20210326-0001/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2XQR52ICKRK3GC4HDWLMWF2U55YGAR63/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GWQWPWYZRXVFJI5M3VCM72X27IB7CKOB/
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ebee0eab08594b2bd5db716288a4f1ae5936e9bc
- agent/type
- agent/severity
- agent/remedy
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/first-publish-date
- agent/event
- agent/author
- agent/last-modified-date
- agent/softwarecombine
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- collector/nvd-index
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/3.2
- version/linux linux kernel/5.10.16
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/32
- version/fedoraproject fedora/33
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- vendor/netapp
- canonical/netapp cloud backup
- canonical/netapp solidfire\, enterprise sds \& hci storage node
- canonical/netapp solidfire \& hci management node
- canonical/netapp hci compute node
- canonical/netapp hci h410c firmware
- canonical/netapp hci h410c