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.
Published 2021-03-20 22:15:12
Updated 2022-07-30 03:46:34
Source MITRE
View at NVD,   CVE.org

Products affected by CVE-2020-27171

Exploit prediction scoring system (EPSS) score for CVE-2020-27171

0.16%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 34 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-27171

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
3.6
LOW AV:L/AC:L/Au:N/C:P/I:N/A:P
3.9
4.9
NIST
6.0
MEDIUM CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H
0.8
5.2
NIST

CWE ids for CVE-2020-27171

  • A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-27171

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