A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.
Published 2022-08-24 16:15:10
Updated 2022-10-06 15:30:13
Source Red Hat, Inc.
View at NVD,   CVE.org

Products affected by CVE-2021-4159

Exploit prediction scoring system (EPSS) score for CVE-2021-4159

0.04%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-4159

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.4
MEDIUM CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
0.8
3.6
NIST

CWE ids for CVE-2021-4159

References for CVE-2021-4159

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