CVE-2022-27666

Name: CVE-2022-27666
Creator: NVD / NIST
Published: 2022-03-23T06:15:06.717+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 4.53%

Last modified Jun 17, 2026

CVE-2022-27666 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A heap buffer overflow flaw was found in IPsec ESP transformation code in net/ipv4/esp4.c and net/ipv6/esp6.c. This flaw allows a local attacker with a normal user privilege to overwrite kernel heap objects and may cause a local privilege escalation threat.. EPSS estimates a 4.53% chance of exploitation in the next 30 days.

Description

A heap buffer overflow flaw was found in IPsec ESP transformation code in net/ipv4/esp4.c and net/ipv6/esp6.c. This flaw allows a local attacker with a normal user privilege to overwrite kernel heap objects and may cause a local privilege escalation threat.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

4.53%

90.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 5.17
Linux	Linux Kernel	5.17
Fedoraproject	Fedora	34
Fedoraproject	Fedora	35
Redhat	Virtualization	4.0
Redhat	Enterprise Linux	8.0
Netapp	H300s Firmware	All versions
Netapp	H500s Firmware	All versions
Netapp	H700s Firmware	All versions
Netapp	H300e Firmware	All versions
Netapp	H500e Firmware	All versions
Netapp	H700e Firmware	All versions
Netapp	H410s Firmware	All versions
Netapp	H410c Firmware	All versions
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=2061633Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/ebe48d368e97d007bfeb76fcb065d6cfc4c96645Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20220429-0001/Third Party Advisory
https://www.debian.org/security/2022/dsa-5127Third Party Advisory
https://www.debian.org/security/2022/dsa-5173Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2061633Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/ebe48d368e97d007bfeb76fcb065d6cfc4c96645Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20220429-0001/Third Party Advisory
https://www.debian.org/security/2022/dsa-5127Third Party Advisory
https://www.debian.org/security/2022/dsa-5173Third Party Advisory

Timeline

Published: Mar 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-27666?

How severe is CVE-2022-27666?

CVE-2022-27666 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 4.53% probability of exploitation in the next 30 days.

How do I fix CVE-2022-27666?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-27666?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST