CVE-2022-27666: Debian Linux

High severity, CVSS 7.8. EPSS: 5.5% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only; version 11.0 only
• Fedoraproject Fedora: version 34 only; version 35 only
• Linux Linux Kernel: from 4.11, before 4.14.274 (fixed in 4.14.274); from 4.15, before 4.19.237 (fixed in 4.19.237); from 4.20, before 5.4.188 (fixed in 5.4.188); from 5.5, before 5.10.108 (fixed in 5.10.108); from 5.11, before 5.15.29 (fixed in 5.15.29); from 5.16, before 5.16.15 (fixed in 5.16.15); …
• Netapp h300e Firmware: affected versions not specified
• Netapp h300s Firmware: affected versions not specified
• Netapp h410c Firmware: affected versions not specified
• Netapp h410s Firmware: affected versions not specified
• Netapp h500e Firmware: affected versions not specified
• Netapp h500s Firmware: affected versions not specified
• Netapp h700e Firmware: affected versions not specified
• Netapp h700s Firmware: affected versions not specified
• Red Hat Enterprise Linux: version 8.0 only
• Red Hat Virtualization: version 4.0 only

Published 2022-03-23. Last modified 2026-09-01.