CVE-2020-36694

MEDIUM
6.7
CVSS Score
Published: May 21, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 03:15 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM6.7
Exploit prediction
EPSS 0.4%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.10
Affected range stops below 5.10, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.7MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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