Vulnerability DatabaseCVE-2018-25020
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CVE-2018-25020
Published:December 08, 2021
Updated:May 17, 2026
The BPF subsystem in the Linux kernel before 4.17 mishandles situations with a long jump over an instruction sequence where inner instructions require substantial expansions into multiple BPF instructions, leading to an overflow. This affects kernel/bpf/core.c and net/core/filter.c.
Related Resources (4)
https://security.netapp.com/advisory/ntap-20211229-0005/
http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2018-25020
https://github.com/torvalds/linux/commit/050fad7c4534c13c8eb1d9c2ba66012e014773cb
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CVSS v4
Base Score:
8.5
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.8
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-120
EPSS
Base Score:
0.16