CVE-2021-30661
A use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.1, iOS 12.5.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. Processing
02 Description
A use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.1, iOS 12.5.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. Processing
03 Exploitation and scoring
- Exploitation
- Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2021-11-03. Federal remediation due 2021-11-17.
- SSVC decision
- ExploitationactiveCISA reports credible evidence of active exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 4.49% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 91.1% of scored records. A rank, not a probability.
- NVD base score
- 8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-09-08 14:48Z5 YR AGO
- Last updated
- 2025-10-21 23:25Z1 YR AGO
- Reserved
- 2021-04-13
- Assigning CNA
- apple
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.8)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- Data version
- 5.1
- Document digest
- 64626bb662055c806b6aac1dbb9c8458368c08638f9250bcd68b3eb63933f2a8
05 Affected products
06 References
- support.apple.comhttps://support.apple.com/en-us/HT212317
- support.apple.comhttps://support.apple.com/en-us/HT212323
- support.apple.comhttps://support.apple.com/en-us/HT212324
- support.apple.comhttps://support.apple.com/en-us/HT212325
- support.apple.comhttps://support.apple.com/en-us/HT212341
- support.apple.comhttps://support.apple.com/en-us/HT212318
- www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30661
07 Fixed in
AlmaLinux 8
- OpenEXR-devel Fixed in 2.2.0-12.el8
- OpenEXR-libs Fixed in 2.2.0-12.el8
- accountsservice-devel Fixed in 0.6.55-1.el8
- atkmm Fixed in 2.24.2-7.el8
- atkmm-devel Fixed in 2.24.2-7.el8
- atkmm-doc Fixed in 2.24.2-7.el8
- cairomm Fixed in 1.12.0-8.el8
- cairomm-devel Fixed in 1.12.0-8.el8
- cairomm-doc Fixed in 1.12.0-8.el8
- chrome-gnome-shell Fixed in 10.1-7.el8
- dleyna-core Fixed in 0.6.0-3.el8
- dleyna-server Fixed in 0.6.0-3.el8
- enchant2 Fixed in 2.2.3-3.el8
- enchant2-devel Fixed in 2.2.3-3.el8
- gamin Fixed in 0.1.10-32.el8
- gamin-devel Fixed in 0.1.10-32.el8
- geoclue2 Fixed in 2.5.5-2.el8
- geoclue2-demos Fixed in 2.5.5-2.el8
- geoclue2-devel Fixed in 2.5.5-2.el8
- geoclue2-libs Fixed in 2.5.5-2.el8
- geocode-glib Fixed in 3.26.0-3.el8
- geocode-glib-devel Fixed in 3.26.0-3.el8
- gjs Fixed in 1.56.2-5.el8
- gjs-devel Fixed in 1.56.2-5.el8
- glib2-doc Fixed in 2.56.4-9.el8
- glib2-static Fixed in 2.56.4-9.el8
- glibmm24 Fixed in 2.56.0-2.el8
- glibmm24-devel Fixed in 2.56.0-2.el8
- glibmm24-doc Fixed in 2.56.0-2.el8
- gnome-boxes Fixed in 3.36.5-8.el8
- gnome-photos Fixed in 3.28.1-4.el8
- gnome-photos-tests Fixed in 3.28.1-4.el8
- gnome-terminal Fixed in 3.28.3-3.el8
- gnome-terminal-nautilus Fixed in 3.28.3-3.el8
- gtk-doc Fixed in 1.28-3.el8
- gtk2 Fixed in 2.24.32-5.el8
- gtk2-devel Fixed in 2.24.32-5.el8
- gtk2-devel-docs Fixed in 2.24.32-5.el8
- gtk2-immodule-xim Fixed in 2.24.32-5.el8
- gtk2-immodules Fixed in 2.24.32-5.el8
41 further packages in AlmaLinux 8 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Arch Linux
- wpewebkit Not affected
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
CloudLinux 8
- OpenEXR-devel Fixed in 2.2.0-12.el8
- OpenEXR-libs Fixed in 2.2.0-12.el8
- accountsservice-devel Fixed in 0.6.55-1.el8
- atkmm Fixed in 2.24.2-7.el8
- atkmm-devel Fixed in 2.24.2-7.el8
- atkmm-doc Fixed in 2.24.2-7.el8
- cairomm Fixed in 1.12.0-8.el8
- cairomm-devel Fixed in 1.12.0-8.el8
- cairomm-doc Fixed in 1.12.0-8.el8
- chrome-gnome-shell Fixed in 10.1-7.el8
- dleyna-core Fixed in 0.6.0-3.el8
- dleyna-server Fixed in 0.6.0-3.el8
- enchant2 Fixed in 2.2.3-3.el8
- enchant2-devel Fixed in 2.2.3-3.el8
- gamin Fixed in 0.1.10-32.el8
- gamin-devel Fixed in 0.1.10-32.el8
- geoclue2 Fixed in 2.5.5-2.el8
- geoclue2-demos Fixed in 2.5.5-2.el8
- geoclue2-devel Fixed in 2.5.5-2.el8
- geoclue2-libs Fixed in 2.5.5-2.el8
- geocode-glib Fixed in 3.26.0-3.el8
- geocode-glib-devel Fixed in 3.26.0-3.el8
- gjs Fixed in 1.56.2-5.el8
- gjs-devel Fixed in 1.56.2-5.el8
- glib2-doc Fixed in 2.56.4-9.el8
- glib2-static Fixed in 2.56.4-9.el8
- glibmm24 Fixed in 2.56.0-2.el8
- glibmm24-devel Fixed in 2.56.0-2.el8
- glibmm24-doc Fixed in 2.56.0-2.el8
- gnome-boxes Fixed in 3.36.5-8.el8
- gnome-photos Fixed in 3.28.1-4.el8
- gnome-photos-tests Fixed in 3.28.1-4.el8
- gnome-terminal Fixed in 3.28.3-3.el8
- gnome-terminal-nautilus Fixed in 3.28.3-3.el8
- gtk-doc Fixed in 1.28-3.el8
- gtk2 Fixed in 2.24.32-5.el8
- gtk2-devel Fixed in 2.24.32-5.el8
- gtk2-devel-docs Fixed in 2.24.32-5.el8
- gtk2-immodule-xim Fixed in 2.24.32-5.el8
- gtk2-immodules Fixed in 2.24.32-5.el8
41 further packages in CloudLinux 8 not shown (first 40 listed).
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- webkit2gtk Fixed in 2.30.1-1
- wpewebkit Fixed in 2.30.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- webkit2gtk Fixed in 2.30.1-1
- wpewebkit Fixed in 2.30.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- webkit2gtk Fixed in 2.30.1-1
- wpewebkit Fixed in 2.30.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- qtwebkit-opensource-src No fix yet
- qtwebkit-source No fix yet
- webkit2gtk No fix yet
- webkitgtk No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- qtwebkit-opensource-src No fix yet
- qtwebkit-source No fix yet
- webkit2gtk Fixed in 2.30.3-0ubuntu0.18.04.1
- webkitgtk No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- qtwebkit-opensource-src No fix yet
- webkit2gtk Fixed in 2.30.3-0ubuntu0.20.04.1
- wpewebkit No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- qtwebkit-opensource-src No fix yet
- wpewebkit No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- qtwebkit-opensource-src No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.