CVE-2021-30983
Apple iOS and iPadOS Buffer Overflow Vulnerability
Apple iOS and iPadOS
A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. An application may be able to execute arbitrary code with kernel privileges.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 27 June 2022. US federal agencies were required to remediate it by 18 July 2022.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 2.9%, which is higher than 86.7% 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:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2021-30983 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2021-30983.
What does CVE-2021-30983 affect?
CVE-2021-30983 affects Apple iOS and iPadOS. A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. An application may be able to execute arbitrary code with kernel privileges.
How severe is CVE-2021-30983?
CVE-2021-30983 is rated HIGH with a CVSS base score of 7.8. EPSS puts the probability of exploitation in the next 30 days at 2.9%, higher than 86.7% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 18 July 2022.
How should organisations respond to CVE-2021-30983?
Apply the vendor patch for Apple iOS and iPadOS 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.