Vulnerability Database

309,130

Total vulnerabilities in the database

CVE-2021-26931

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.

  • Published: Feb 17, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-26931
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 5.5
  • AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

  • Severity: Low
  • Score: 1.9
  • AV:L/AC:M/Au:N/C:N/I:N/A:P

CWEs:

Software From Fixed in
linux / linux_kernel 2.6.39 5.10.16.x
fedoraproject / fedora 32 32.x
fedoraproject / fedora 33 33.x
debian / debian_linux 9.0 9.0.x