CVE-2021-33909

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-190 CWE-787

Affected software

No affected versions have been published.

Timeline

Published: Jul 20, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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