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01 Record

CVE-2021-21775

A use-after-free vulnerability exists in the way certain events are processed for ImageLoader objects of Webkit WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak

MediumPUBLISHEDCNA: talos
CNA base score6.8 CVSS v3.xCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
View raw JSON

02 Description

A use-after-free vulnerability exists in the way certain events are processed for ImageLoader objects of Webkit WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
1.27% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 69.3% of scored records. A rank, not a probability.
NVD base score
8.0 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
NVD analysis status
Modified. 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
2021-07-07 21:18Z5 YR AGO
Last updated
2024-08-03 18:23Z2 YR AGO
Reserved
2021-01-04
Assigning CNA
talos
Record state
PUBLISHED
Severity
Medium (CVSS 6.8)
CNA CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
Weaknesses
Data version
5.1
Document digest
6b48f5857301e3ebddadaace0ce61e7372e86e515a10c3c80190bc92089fe279

05 Affected products

VendorProductVersionsPlatforms
n/aWebkitWebkit WebKitGTK 2.30.4—

06 References

07 Fixed in

AlmaLinux 8

  • LibRaw
    Fixed in 0.19.5-3.el8
  • LibRaw-devel
    Fixed in 0.19.5-3.el8
  • accountsservice
    Fixed in 0.6.55-2.el8
  • accountsservice-devel
    Fixed in 0.6.55-2.el8
  • accountsservice-libs
    Fixed in 0.6.55-2.el8
  • gdm
    Fixed in 1:40.0-15.el8
  • gnome-autoar
    Fixed in 0.2.3-2.el8
  • gnome-calculator
    Fixed in 3.28.2-2.el8
  • gnome-classic-session
    Fixed in 3.32.1-20.el8
  • gnome-control-center
    Fixed in 3.28.2-28.el8
  • gnome-control-center-filesystem
    Fixed in 3.28.2-28.el8
  • gnome-online-accounts
    Fixed in 3.28.2-3.el8
  • gnome-online-accounts-devel
    Fixed in 3.28.2-3.el8
  • gnome-session
    Fixed in 3.28.1-13.el8
  • gnome-session-kiosk-session
    Fixed in 3.28.1-13.el8
  • gnome-session-wayland-session
    Fixed in 3.28.1-13.el8
  • gnome-session-xsession
    Fixed in 3.28.1-13.el8
  • gnome-settings-daemon
    Fixed in 3.32.0-16.el8.alma
  • gnome-shell
    Fixed in 3.32.2-40.el8
  • gnome-shell-extension-apps-menu
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-auto-move-windows
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-common
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-dash-to-dock
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-desktop-icons
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-disable-screenshield
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-drive-menu
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-gesture-inhibitor
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-horizontal-workspaces
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-launch-new-instance
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-native-window-placement
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-no-hot-corner
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-panel-favorites
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-places-menu
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-screenshot-window-sizer
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-systemMonitor
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-top-icons
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-updates-dialog
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-user-theme
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-window-grouper
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-window-list
    Fixed in 3.32.1-20.el8

17 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
    Fixed in 2.32.3-1

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

CloudLinux 8

  • LibRaw
    Fixed in 0.19.5-3.el8
  • LibRaw-devel
    Fixed in 0.19.5-3.el8
  • accountsservice
    Fixed in 0.6.55-2.el8
  • accountsservice-devel
    Fixed in 0.6.55-2.el8
  • accountsservice-libs
    Fixed in 0.6.55-2.el8
  • gdm
    Fixed in 1:40.0-15.el8
  • gnome-autoar
    Fixed in 0.2.3-2.el8
  • gnome-calculator
    Fixed in 3.28.2-2.el8
  • gnome-classic-session
    Fixed in 3.32.1-20.el8
  • gnome-control-center
    Fixed in 3.28.2-28.el8
  • gnome-control-center-filesystem
    Fixed in 3.28.2-28.el8
  • gnome-online-accounts
    Fixed in 3.28.2-3.el8
  • gnome-online-accounts-devel
    Fixed in 3.28.2-3.el8
  • gnome-session
    Fixed in 3.28.1-13.el8
  • gnome-session-kiosk-session
    Fixed in 3.28.1-13.el8
  • gnome-session-wayland-session
    Fixed in 3.28.1-13.el8
  • gnome-session-xsession
    Fixed in 3.28.1-13.el8
  • gnome-settings-daemon
    Fixed in 3.32.0-16.el8.alma
  • gnome-shell
    Fixed in 3.32.2-40.el8
  • gnome-shell-extension-apps-menu
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-auto-move-windows
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-common
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-dash-to-dock
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-desktop-icons
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-disable-screenshield
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-drive-menu
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-gesture-inhibitor
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-horizontal-workspaces
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-launch-new-instance
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-native-window-placement
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-no-hot-corner
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-panel-favorites
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-places-menu
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-screenshot-window-sizer
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-systemMonitor
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-top-icons
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-updates-dialog
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-user-theme
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-window-grouper
    Fixed in 3.32.1-20.el8
  • gnome-shell-extension-window-list
    Fixed in 3.32.1-20.el8

17 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 2.32.3-1
  • wpewebkit
    Fixed in 2.32.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • webkit2gtk
    Fixed in 2.32.3-1
  • wpewebkit
    Fixed in 2.32.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • webkit2gtk
    Fixed in 2.32.3-1
  • wpewebkit
    Fixed in 2.32.3-1

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 2.32.3-0ubuntu0.18.04.1
  • 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 2.32.3-0ubuntu0.20.04.1
  • 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.