Use After Free in Apple Ios
CVE-2021-30858
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a…
Vulnerability class: Use-After-Free
EPSS: 0.135 (96.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Apple Ios — versions unspecified
- Apple Ipados
- Apple Iphone_os
- Apple Macos — versions unspecified
- Debian Debian_linux — versions 10.0, 11.0
- Fedoraproject Fedora — versions 33, 34
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- product-security@apple.com (Third Party Advisory, x_refsource_MISC)
- product-security@apple.com (Third Party Advisory, x_refsource_MISC)
- product-security@apple.com (mailing-list, x_refsource_FULLDISC, Mailing List, Third Party Advisory)
- product-security@apple.com (mailing-list, x_refsource_FULLDISC, Mailing List, Third Party Advisory)
- product-security@apple.com (mailing-list, x_refsource_FULLDISC, Mailing List, Third Party Advisory)
- product-security@apple.com (mailing-list, x_refsource_MLIST, Mailing List)
- product-security@apple.com (x_refsource_FEDORA, vendor-advisory, Release Notes)
- product-security@apple.com (mailing-list, x_refsource_FULLDISC, Mailing List, Third Party Advisory)
- product-security@apple.com (mailing-list, x_refsource_FULLDISC, Mailing List, Third Party Advisory)
- product-security@apple.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_DEBIAN)
Frequently asked questions
- What is CVE-2021-30858?
- CVE-2021-30858 is a high-severity vulnerability in Apple Ios, classified under Use After Free. CVSS score: 8.8/10. Published 2021-08-24.
- How severe is CVE-2021-30858?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-30858 known to be exploited?
- Yes. CVE-2021-30858 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 20 public proof-of-concept repositories are indexed.