AUGUST 4, 2026
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Case File

CVE-2021-3864

HIGH · CVSS 7 EPSS 0.75%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-08-26 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.0. See the original NVD description below for full technical details.

CVE
CVE-2021-3864
Severity
HIGH
CVSS
7
EPSS
0.75%

Original NVD Description

A flaw was found in the way the dumpable flag setting was handled when certain SUID binaries executed its descendants. The prerequisite is a SUID binary that sets real UID equal to effective UID, and real GID equal to effective GID. The descendant will then have a dumpable value set to 1. As a result, if the descendant process crashes and core_pattern is set to a relative value, its core dump is stored in the current directory with uid:gid permissions. An unprivileged local user with eligible root SUID binary could use this flaw to place core dumps into root-owned directories, potentially resulting in escalation of privileges.

Related CVEs

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