High severity8.8NVD Advisory· Published Oct 28, 2021· Updated Jun 17, 2026

CVE-2021-30818

Description

A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, Safari 15, watchOS 8. Processing maliciously crafted web content may lead to arbitrary code execution.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Apple Inc./Safari3 versions
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*range: <15.0
- (no CPE)range: 15
- (no CPE)range: unspecified
Apple Inc./Ipados2 versions
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*range: <14.8
- (no CPE)range: 14.8, 15
Apple Inc./Iphone OS
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
Range: <14.8
Apple Inc./macOS
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Range: <12.0.1
Apple Inc./tvOS3 versions
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*range: <15.0
- (no CPE)range: 15
- (no CPE)range: unspecified
Apple Inc./watchOS3 versions
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*range: <8.0
- (no CPE)range: 8
- (no CPE)range: unspecified
Apple Inc./iOSllm-fuzzy
Range: 14.8, 15
osv-coords41 versions
pkg:rpm/almalinux/webkit2gtk3 pkg:rpm/almalinux/webkit2gtk3-devel pkg:rpm/almalinux/webkit2gtk3-jsc pkg:rpm/almalinux/webkit2gtk3-jsc-devel pkg:rpm/opensuse/webkit2gtk3&distro=openSUSE%20Leap%2015.3 pkg:rpm/suse/webkit2gtk3&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Enterprise%20Storage%207 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-ESPOS pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP3 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2015%20SP2 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-BCL pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Manager%20Proxy%204.1 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.1 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20Manager%20Server%204.1 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/webkit2gtk3&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
< 2.34.6-1.el8+ 40 more
- (no CPE)range: < 2.34.6-1.el8
- (no CPE)range: < 2.34.6-1.el8
- (no CPE)range: < 2.34.6-1.el8
- (no CPE)range: < 2.34.6-1.el8
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-3.92.1
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-3.92.1
- (no CPE)range: < 2.34.3-3.92.1
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-3.92.1
- (no CPE)range: < 2.34.3-3.92.1
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-3.92.1
- (no CPE)range: < 2.34.3-3.92.1
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-3.92.1
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-3.92.1
- (no CPE)range: < 2.34.3-3.92.1
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-23.3
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-2.82.1
- (no CPE)range: < 2.34.3-2.82.1
Apple Inc./iOS and iPadOScpe-rescue
Range: unspecified

Patches

Vulnerability mechanics

References

www.openwall.com/lists/oss-security/2021/12/20/6nvdMailing ListThird Party Advisory
support.apple.com/en-us/HT212807nvdRelease NotesVendor Advisory
support.apple.com/en-us/HT212814nvdRelease NotesVendor Advisory
support.apple.com/en-us/HT212815nvdRelease NotesVendor Advisory
support.apple.com/en-us/HT212816nvdRelease NotesVendor Advisory
support.apple.com/en-us/HT212819nvdRelease NotesVendor Advisory
support.apple.com/kb/HT212869nvdVendor Advisory

News mentions

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