AUGUST 4, 2026
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Case File

CVE-2021-26931

MEDIUM · CVSS 5.5 EPSS 0.54%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-02-17 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2021-26931
Severity
MEDIUM
CVSS
5.5
EPSS
0.54%
Linux

Original NVD 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.