CVE-2022-2586
Linux Kernel Use-After-Free Vulnerability
Linux Kernel
It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a use-after-free once that table was deleted.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 26 June 2024. US federal agencies were required to remediate it by 17 July 2024.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 10.2%, which is higher than 95.6% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
Frequently asked questions
Is CVE-2022-2586 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2022-2586.
What does CVE-2022-2586 affect?
CVE-2022-2586 affects Linux Kernel. It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a use-after-free once that table was deleted.
How severe is CVE-2022-2586?
CVE-2022-2586 is rated MEDIUM with a CVSS base score of 5.3. EPSS puts the probability of exploitation in the next 30 days at 10.2%, higher than 95.6% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 17 July 2024.
How should organisations respond to CVE-2022-2586?
Apply the vendor patch for Linux Kernel as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.