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CVE-2020-27171

CVSS v3.1 6 (Medium)
60% Progress
CVSS v2.0 3.6 (Low)
36% Progress
EPSS 0.05 % (17th)
0.05% Progress
Affected Products 4
Advisories 27
Info CVSS EPSS Affected Configurations References Security Advisories Packages & Software OVAL Tools, Exploits & PoC Graph Web & Social Timeline

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting 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-10d2bb2e6b1d.

Weaknesses
CWE-193
Off-by-one Error
CVE Status
PUBLISHED
CNA
MITRE
Published Date
2021-03-20 22:15:12
(3 years ago)
Updated Date
2023-11-07 03:20:50
(10 months ago)

Affected Products

Canonical

Debian

Fedoraproject

Linux

Configuration #1

    CPE23 From Up To
  Linux Kernel prior 5.11.8 version cpe:2.3:o:linux:linux_kernel < 5.11.8

Configuration #2

    CPE23 From Up To
  Fedoraproject Fedora 32 cpe:2.3:o:fedoraproject:fedora:32
  Fedoraproject Fedora 33 cpe:2.3:o:fedoraproject:fedora:33
  Fedoraproject Fedora 34 cpe:2.3:o:fedoraproject:fedora:34

Configuration #3

    CPE23 From Up To
  Debian Linux 9.0 cpe:2.3:o:debian:debian_linux:9.0

Configuration #4

    CPE23 From Up To
  Canonical Ubuntu Linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm
  Canonical Ubuntu Linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts
  Canonical Ubuntu Linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts
  Canonical Ubuntu Linux 20.04 cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts