CVE-2020-36694

Medium

An issue was discovered in netfilter in the Linux kernel before 5.10. There can be a use-after-free in the packet processing context, because the per-CPU sequence count is mishandled during concurrent iptables rules replacement. This could be exploited with the CAP_NET_ADMIN capability in an unprivileged namespace. NOTE: cc00bca was reverted in 5.12.

Package Linux Kernel
Published 2023-05-21
Last modified 2025-01-31
CVSS version 3.1
Patch available
Awaiting data

CVSS 3.1 score

6.7

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

Weakness type

CWE-416

CVE-2020-36694 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

References

5 total

Frequently asked questions

  • What is CVE-2020-36694?

    CVE-2020-36694 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.7 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2020-36694 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2020-36694?

    CVE-2020-36694 has a CVSS score of 6.7 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:H/A:H .

  • Is there a patch available for CVE-2020-36694?

    Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2020-36694 patch availability.

  • Is CVE-2020-36694 actively exploited?

    No. CVE-2020-36694 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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