CVE-2020-27171

Medium

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.

Package Linux Kernel
Published 2021-03-20
Last modified 2024-11-21
CVSS version 3.1
Patch available
Awaiting data

CVSS 3.1 score

6.0

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

Weakness type

CWE-193

CVE-2020-27171 is classified as CWE-193

See CWE-193 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2020-27171 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Frequently asked questions

  • What is CVE-2020-27171?

    CVE-2020-27171 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.0 out of 10 . CVE-2020-27171 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2020-27171?

    CVE-2020-27171 has a CVSS score of 6.0 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H .

  • Is there a patch available for CVE-2020-27171?

    No patch is currently available for CVE-2020-27171. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2020-27171 actively exploited?

    No — CVE-2020-27171 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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