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Debian: CVE-2020-27170: linux, linux-4.19 -- security update

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Debian: CVE-2020-27170: linux, linux-4.19 -- security update

Severity
2
CVSS
(AV:L/AC:M/Au:N/C:P/I:N/A:N)
Published
03/20/2021
Created
04/01/2021
Added
03/31/2021
Modified
04/01/2021

Description

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.

Solution(s)

  • debian-upgrade-linux
  • debian-upgrade-linux-4-19

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