CVE-2021-3764

5.5 mediumEPSS 0.3%

Medium (5.5) in linux linux kernel. EPSS 0.3% chance of exploitation in the next 30 days.

A memory leak flaw was found in the Linux kernel's ccp_run_aes_gcm_cmd() function that allows an attacker to cause a denial of service. The vulnerability is similar to the older CVE-2019-18808. The highest threat from this vulnerability is to system availability.

Severity

CVSS 3.1

5.5 medium

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 19% of CVEs (scores of 2026-10-31)
CWEs: CWE-401, CWE-400
Published: 2022-08-23
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

linux:linux_kernel

References

https://access.redhat.com/security/cve/CVE-2021-3764
https://bugzilla.redhat.com/show_bug.cgi?id=1997467
https://github.com/torvalds/linux/commit/505d9dcb0f7ddf9d075e729523a33d38642ae680
https://security-tracker.debian.org/tracker/CVE-2021-3764
https://access.redhat.com/security/cve/CVE-2021-3764

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