CVE-2021-26931
First published: Wed Feb 17 2021(Updated: )
An issue was discovered in the Linux kernel 2.6.39 through 5.10.16, as used in Xen. Block, net, and SCSI backends consider certain errors a plain bug, deliberately causing a kernel crash. For errors potentially being at least under the influence of guests (such as out of memory conditions), it isn't correct to assume a plain bug. Memory allocations potentially causing such crashes occur only when Linux is running in PV mode, though. This affects drivers/block/xen-blkback/blkback.c and drivers/xen/xen-scsiback.c.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=2.6.39<=5.10.16 | |
| Fedoraproject Fedora | =32 | |
| Fedoraproject Fedora | =33 | |
| Debian Debian Linux | =9.0 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.10-1 6.12.11-1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- http://xenbits.xen.org/xsa/advisory-362.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://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3194a1746e8aabe86075fd3c5e7cf1f4632d7f16
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5a264285ed1cd32e26d9de4f3c8c6855e467fd63
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7c77474b2d22176d2bfb592ec74e0f2cb71352c9
- 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://launchpad.net/bugs/cve/CVE-2021-26931
- https://xenbits.xen.org/xsa/advisory-362.html
- https://security-tracker.debian.org/tracker/CVE-2021-26931
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26931
- https://nvd.nist.gov/vuln/detail/CVE-2021-26931
- https://ubuntu.com/security/CVE-2021-26931
- agent/type
- agent/first-publish-date
- agent/weakness
- agent/severity
- agent/author
- collector/launchpad-cve
- source/Launchpad
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/remedy
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/last-modified-date
- agent/trending
- agent/source
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- collector/nvd-cve
- collector/nvd-index
- agent/softwarecombine
- agent/event
- collector/security-tracker-debian
- source/Debian
- vendor/linux
- canonical/linux kernel
- version/linux kernel/2.6.39
- version/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
- package-manager/debian