CVE WatchAug 5, 2026

CVE-2021-41864

prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multipl

CVSS

7.8

High

EPSS

0.4%

p35

KEV

—

Exploit Today

0-100

Published: Oct 2, 2021 · Last modified: Aug 5, 2026 · CWE-190

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-08-262026-09-23

Technical description

prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds write.

Official references

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