CVE-2021-30900
Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
CVSS
7.8HighExploit odds (EPSS)5.20%Chance of exploitation activity in the next 30 days, higher than 92% of CVEs. Scored 23 Oct 2026FIRST EPSS
CISA required actionApply updates per vendor instructions. CISA KEV
What fixes it
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Timeline
Description
Apple GPU drivers, included in iOS, iPadOS, and macOS, contain an out-of-bounds write vulnerability that may allow a malicious application to execute code with kernel privileges.
Text from CVE List
Affected versions 2
- iOS and iPadOSaffected: unspecified before 15.1CVE List
- iOS and iPadOSaffected: unspecified before 14.8CVE List
References 6
- support.apple.com/en-us/HT21286, https://support.apple.com/en-us/HT212868, https://support.apple.com/kb/HT212872Advisoryvia CISA KEV
- support.apple.com/kb/HT212872Advisoryvia CVE List
- nvd.nist.gov/vuln/detail/CVE-2021-30900Referencevia CISA KEV
- support.apple.com/en-us/HT212867Referencevia CVE List
- support.apple.com/en-us/HT212868Referencevia CVE List
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30900Referencevia CVE List