Information Exposure 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% (21st percentile)

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  • Snyk IDSNYK-DEBIAN9-LINUX419-1089632
  • published19 Mar 2021
  • disclosed20 Mar 2021

Introduced: 19 Mar 2021

CVE-2020-27170  (opens in a new tab)
CWE-203  (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 before 5.11.8. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.

CVSS Base Scores

version 3.1