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Vulnerability record · CVE-2022-27666 · published 23 March 2022

CVE-2022-27666: Linux kernel out-of-bounds write vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 5.5% · top 7.5% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score, v2 4.6
5.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
13Affected product versions listed by NVD
10References
1 Sep 2026Last modified by NVD

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.

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

Affected products

13 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=2061633 Issue TrackingPatchThird Party Advisory
https://github.com/torvalds/linux/commit/ebe48d368e97d007bfeb76fcb065d6cfc4c96645 PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20220429-0001/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5127 Third Party Advisory
https://www.debian.org/security/2022/dsa-5173 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2061633 Issue TrackingPatchThird Party Advisory
https://github.com/torvalds/linux/commit/ebe48d368e97d007bfeb76fcb065d6cfc4c96645 PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20220429-0001/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5127 Third Party Advisory
https://www.debian.org/security/2022/dsa-5173 Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-27666), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.