CVE-2020-27950

high-risk
Published 2020-12-08

A memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. A malicious application may be able to disclose kernel memory.

Do I need to act?

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36.6% chance of exploitation in next 30 days
EPSS score — higher than 63% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (4)

Affected Vendors

Apple

References (21)

Third Party Advisory http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Mem...
Mailing List http://seclists.org/fulldisclosure/2020/Dec/32
Vendor Advisory https://support.apple.com/en-us/HT211928
Vendor Advisory https://support.apple.com/en-us/HT211929
Vendor Advisory https://support.apple.com/en-us/HT211931
Vendor Advisory https://support.apple.com/en-us/HT211940
Vendor Advisory https://support.apple.com/en-us/HT211944
Vendor Advisory https://support.apple.com/en-us/HT211945
Vendor Advisory https://support.apple.com/en-us/HT211946
Vendor Advisory https://support.apple.com/en-us/HT211947
Third Party Advisory http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Mem...
Mailing List http://seclists.org/fulldisclosure/2020/Dec/32
Vendor Advisory https://support.apple.com/en-us/HT211928
Vendor Advisory https://support.apple.com/en-us/HT211929
Vendor Advisory https://support.apple.com/en-us/HT211931
Vendor Advisory https://support.apple.com/en-us/HT211940
Vendor Advisory https://support.apple.com/en-us/HT211944
Vendor Advisory https://support.apple.com/en-us/HT211945
Vendor Advisory https://support.apple.com/en-us/HT211946
Vendor Advisory https://support.apple.com/en-us/HT211947
and 1 more references
51
/ 100
high-risk
Severity 18/34 · Moderate
Exploitability 23/34 · High
Exposure 10/34 · Low