CVEvulnerability

CVE-2021-26931

5.5 MEDIUM Published 2021-02-17 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-02-17
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
1.9 LOW — AV:L/AC:M/Au:N/C:N/I:N/A:P
Weaknesses
CWE-770

Description

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.

Affected configurations

• linux linux kernel (>= 2.6.39 <= 5.10.16) • fedoraproject fedora 32 • fedoraproject fedora 33 • debian debian linux 9.0

Related

Weakness · CWE (1)

  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References