CVEs / CVE-2020-27950
CVE-2020-27950: Apple Multiple Products Memory Initialization Vulnerability
- Known exploited in the CISA KEV catalog since 3 Nov 2021
- medium 5.5 CVSS 3.1 (NVD)
- EPSS 16.5% chance of exploitation in the next 30 days, higher than 96% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Apple iOS, iPadOS, macOS, and watchOS contain a memory initialization vulnerability that may allow a malicious application to disclose kernel memory.
Description
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Apple watchOS | from unspecified, before 7.1 | 7.1 |
| Apple iOS and iPadOS | from unspecified, before 14.2 | 14.2 |
| Apple macOS | from unspecified, before 11.0 | 11.0 |
| Apple macOS | from unspecified, before 12.4 | 12.4 |
| Apple macOS | from unspecified, before 6.2 | 6.2 |
| Apple macOS | from unspecified, before 5.3 | 5.3 |
| Apple macOS | from unspecified, before 2020 | 2020 |
| Apple macOS | from unspecified, before 10.15 | 10.15 |
Exploitation
| In CISA KEV since | 3 Nov 2021 |
|---|---|
| Due date for US federal agencies | 3 May 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 5.5 mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:NScored by NVD |
|---|---|
| Weakness | CWE-665 |
References
- CVE-2020-27950 on NVD
- CVE-2020-27950 in the CISA KEV catalog
- http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2020/Dec/32 Mailing List, Third Party 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 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27950 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.