Actively exploited · Published Sep 8, 2021 · Assigned by apple
CVE-2021-30661
High 8.8 Exploited
In plain English
A high-severity use-after-free in iOS and iPadOS from Apple. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). The chance it is exploited in the next 30 days is estimated at 4.5% (higher than 92% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)4.5%top 8.5% of all CVEs
Exploited in the wildYesCISA KEV since Nov 3, 2021
Attack toolingNoneno public tooling known
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Nov 17, 2021.
Official 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 maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | OpenEXR-devel | 2.2.0-12.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | OpenEXR-libs | 2.2.0-12.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | accountsservice-devel | 0.6.55-1.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | atkmm | 2.24.2-7.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | atkmm-devel | 2.24.2-7.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | atkmm-doc | 2.24.2-7.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | cairomm | 1.12.0-8.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | cairomm-devel | 1.12.0-8.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | cairomm-doc | 1.12.0-8.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | chrome-gnome-shell | 10.1-7.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | dleyna-core | 0.6.0-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | dleyna-server | 0.6.0-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | enchant2 | 2.2.3-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | enchant2-devel | 2.2.3-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gamin | 0.1.10-32.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gamin-devel | 0.1.10-32.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | geoclue2 | 2.5.5-2.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | geoclue2-demos | 2.5.5-2.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | geoclue2-devel | 2.5.5-2.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | geoclue2-libs | 2.5.5-2.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | geocode-glib | 3.26.0-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | geocode-glib-devel | 3.26.0-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gjs | 1.56.2-5.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gjs-devel | 1.56.2-5.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | glib2-doc | 2.56.4-9.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | glib2-static | 2.56.4-9.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | glibmm24 | 2.56.0-2.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | glibmm24-devel | 2.56.0-2.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | glibmm24-doc | 2.56.0-2.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gnome-boxes | 3.36.5-8.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gnome-photos | 3.28.1-4.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gnome-photos-tests | 3.28.1-4.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gnome-terminal | 3.28.3-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gnome-terminal-nautilus | 3.28.3-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gtk-doc | 1.28-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gtk2 | 2.24.32-5.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gtk2-devel | 2.24.32-5.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gtk2-devel-docs | 2.24.32-5.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gtk2-immodule-xim | 2.24.32-5.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gtk2-immodules | 2.24.32-5.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gtkmm24 | 2.24.5-6.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gtkmm24-devel | 2.24.5-6.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gtkmm24-docs | 2.24.5-6.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gtkmm30 | 3.22.2-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gtkmm30-devel | 3.22.2-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gtkmm30-doc | 3.22.2-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gvfs | 1.36.2-11.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gvfs-afc | 1.36.2-11.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gvfs-afp | 1.36.2-11.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gvfs-archive | 1.36.2-11.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gvfs-client | 1.36.2-11.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gvfs-devel | 1.36.2-11.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gvfs-fuse | 1.36.2-11.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gvfs-goa | 1.36.2-11.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gvfs-gphoto2 | 1.36.2-11.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gvfs-mtp | 1.36.2-11.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | gvfs-smb | 1.36.2-11.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | libdazzle | 3.28.5-2.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | libdazzle-devel | 3.28.5-2.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | libepubgen | 0.1.0-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | libepubgen-devel | 0.1.0-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | libsass | 3.4.5-6.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | libsass-devel | 3.4.5-6.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | libsigc++20 | 2.10.0-6.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | libsigc++20-devel | 2.10.0-6.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | libsigc++20-doc | 2.10.0-6.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | libvisual | 1:0.4.0-25.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | libvisual-devel | 1:0.4.0-25.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | mutter-devel | 3.32.2-57.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | nautilus | 3.28.1-15.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | nautilus-devel | 3.28.1-15.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | nautilus-extensions | 3.28.1-15.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | pangomm | 2.40.1-6.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | pangomm-devel | 2.40.1-6.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | pangomm-doc | 2.40.1-6.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | soundtouch | 2.0.0-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | soundtouch-devel | 2.0.0-3.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | vala | 0.40.19-2.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | vala-devel | 0.40.19-2.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | woff2 | 1.0.2-5.el8 | ALSA-2021:1586 |
| AlmaLinux:8 | woff2-devel | 1.0.2-5.el8 | ALSA-2021:1586 |
| Alpine:v3.20 | webkit2gtk | 2.30.0-r0 | ALPINE-CVE-2021-30661 |
| Debian:12 | webkit2gtk | 2.30.1-1 | DEBIAN-CVE-2021-30661 |
| Debian:13 | webkit2gtk | 2.30.1-1 | DEBIAN-CVE-2021-30661 |
| Debian:14 | webkit2gtk | 2.30.1-1 | DEBIAN-CVE-2021-30661 |
| Debian:12 | wpewebkit | 2.30.0-1 | DEBIAN-CVE-2021-30661 |
| Debian:13 | wpewebkit | 2.30.0-1 | DEBIAN-CVE-2021-30661 |
| Debian:14 | wpewebkit | 2.30.0-1 | DEBIAN-CVE-2021-30661 |
| Rocky Linux:8 | OpenEXR | 0:2.2.0-12.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | accountsservice | 0:0.6.55-1.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | atkmm | 0:2.24.2-7.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | cairomm | 0:1.12.0-8.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | chrome-gnome-shell | 0:10.1-7.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | dleyna-core | 0:0.6.0-3.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | dleyna-server | 0:0.6.0-3.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | enchant2 | 0:2.2.3-3.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gamin | 0:0.1.10-32.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gdm | 1:3.28.3-39.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | geoclue2 | 0:2.5.5-2.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | geocode-glib | 0:3.26.0-3.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gjs | 0:1.56.2-5.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | glibmm24 | 0:2.56.0-2.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gnome-boxes | 0:3.36.5-8.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gnome-boxes | 0:3.36.5-8.el8.rocky.0.1 | RLSA-2021:1586 |
| Rocky Linux:8 | gnome-control-center | 0:3.28.2-27.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gnome-online-accounts | 0:3.28.2-2.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gnome-photos | 0:3.28.1-4.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gnome-settings-daemon | 0:3.32.0-14.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gnome-shell | 0:3.32.2-30.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gnome-software | 0:3.36.1-5.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gnome-terminal | 0:3.28.3-3.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gtk-doc | 0:1.28-3.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gtk2 | 0:2.24.32-5.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gtkmm24 | 0:2.24.5-6.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gtkmm30 | 0:3.22.2-3.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | gvfs | 0:1.36.2-11.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | libdazzle | 0:3.28.5-2.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | libepubgen | 0:0.1.0-3.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | libsass | 0:3.4.5-6.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | libsigc++20 | 0:2.10.0-6.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | libvisual | 1:0.4.0-25.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | mutter | 0:3.32.2-57.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | nautilus | 0:3.28.1-15.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | pangomm | 0:2.40.1-6.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | soundtouch | 0:2.0.0-3.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | vala | 0:0.40.19-2.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | webkit2gtk3 | 0:2.30.4-1.el8 | RLSA-2021:1586 |
| Rocky Linux:8 | woff2 | 0:1.0.2-5.el8 | RLSA-2021:1586 |
| Ubuntu:22.04:LTS | qtwebkit-opensource-src | no fix listed | UBUNTU-CVE-2021-30661 |
| Ubuntu:24.04:LTS | qtwebkit-opensource-src | no fix listed | UBUNTU-CVE-2021-30661 |
| Ubuntu:22.04:LTS | wpewebkit | no fix listed | UBUNTU-CVE-2021-30661 |
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://support.apple.com/en-us/HT212317 x_refsource_MISC
- https://support.apple.com/en-us/HT212323 x_refsource_MISC
- https://support.apple.com/en-us/HT212324 x_refsource_MISC
- https://support.apple.com/en-us/HT212325 x_refsource_MISC
- https://support.apple.com/en-us/HT212341 x_refsource_MISC
- https://support.apple.com/en-us/HT212318 x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30661 government-resource