Allocation of Resources Without Limits or Throttling Affecting linux-4.19 package, versions <4.19.181-1~deb9u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.05% (17th percentile)

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  • Snyk IDSNYK-DEBIAN9-LINUX419-1089626
  • published17 Feb 2021
  • disclosed17 Feb 2021

Introduced: 17 Feb 2021

CVE-2021-26931  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Debian:9 linux-4.19 to version 4.19.181-1~deb9u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-4.19 package and not the linux-4.19 package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1