CVE-2018-25020

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.

• CWE-120

• http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.htmlThird Party Advisory, VDB Entry
• https://github.com/torvalds/linux/commit/050fad7c4534c13c8eb1d9c2ba66012e014773cbPatch, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20211229-0005/Third Party Advisory
• http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.htmlThird Party Advisory, VDB Entry
• https://github.com/torvalds/linux/commit/050fad7c4534c13c8eb1d9c2ba66012e014773cbPatch, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20211229-0005/Third Party Advisory

Published

Dec 8, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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