# CVE-2020-27950

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.

- Page: https://www.vulneraibility.com/cve/CVE-2020-27950
- CVSS: 5.5
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2022-05-03
- EPSS: 16.52% (percentile 97.0)
- Unvetted proof-of-concept code on GitHub: 2 GitHub proofs of concept (first 2020-12-01)
- CISA SSVC: exploitation active, automatable no, technical impact partial (assessed 2025-01-29)
- Weakness: CWE-665
- Published: 2020-12-08

## Affected versions

- Apple iOS and iPadOS: affected < 14.2
- Apple macOS: affected < 11.0; < 12.4; < 6.2; < 5.3; < 2020; < 10.15
- Apple watchOS: affected < 7.1

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://support.apple.com/en-us/HT211931
- [other] https://support.apple.com/en-us/HT211928
- [other] https://support.apple.com/en-us/HT211929
- [other] https://support.apple.com/en-us/HT211940
- [other] https://support.apple.com/en-us/HT211944
- [other] https://support.apple.com/en-us/HT211945
- [other] https://support.apple.com/en-us/HT211946
- [other] https://support.apple.com/en-us/HT211947
- [other] http://seclists.org/fulldisclosure/2020/Dec/32
- [other] http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27950

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.