Apple Multiple Products Memory Initialization Vulnerability
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…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 3 / 5
- KEV catalog (CISA)03 Nov 2021
- Exploited in EUVD (ENISA)03 Nov 2021
- Used by ransomwareno
- EPSS above 10 %16.5%
- No account, over the networkno
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply updates per vendor instructions.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
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 products
- unspecified <11.0
- unspecified <5.3
- unspecified <2020
- unspecified <6.2
- unspecified <10.15
- unspecified <7.1
- unspecified <14.2
- unspecified <12.4
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
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Added to the KEV catalog
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CISA remediation due date
-
EPSS peak: 16.5%
References
Other exploited vulnerabilities from the same vendor
- CVE-2026-86950Apple Multiple Products Out-of-Bounds Write Vulnerability6.7 · Actively exploited
- CVE-2026-65400Apple macOS Improper Authentication Vulnerability5.8 · Actively exploited
- CVE-2025-43520Apple Multiple Products Classic Buffer Overflow Vulnerability3.4 · Background exploitation
- CVE-2025-43510Apple Multiple Products Improper Locking Vulnerability4.3 · Background exploitation
- CVE-2025-31277Apple Multiple Products Buffer Overflow Vulnerability5.4 · Background exploitation
- CVE-2023-43000Apple Multiple products Use-After-Free Vulnerability5.4 · Background exploitation