Linux Kernel up to 5.16.14 ESP Transformation net/ipv4/esp4.c buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability has been found in Linux Kernel up to 5.16.14 and classified as critical. This vulnerability affects unknown code of the file net/ipv4/esp4.c of the component ESP Transformation Handler. The manipulation leads to memory corruption. Using CWE to declare the problem leads to CWE-120. The weakness was presented 03/23/2022. The advisory is shared for download at This vulnerability was named CVE-2022-27666. Access to the local network is required for this attack to succeed. Technical details are available. There is no exploit available. The current price for an exploit might be approx. USD $0-$5k at the moment. It is declared as not defined. As 0-day the estimated underground price was around $5k-$25k. Upgrading to version 5.16.15 is able to address this issue. The updated version is ready for download at The bugfix is ready for download at It is recommended to upgrade the affected component. A possible mitigation has been published even before and not after the disclosure of the vulnerability. [Details]



IOC - Indicator of Compromise (10)

These indicators of compromise highlight associated network ranges which are known to be part of research and attack activities.

IOA - Indicator of Attack (1)

These indicators of attack list the potential fragments used for technical activities like reconnaissance, exploitation, privilege escalation, and exfiltration. This data is unique as it uses our predictive model for actor profiling.


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