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01 Record

CVE-2023-39928

A use-after-free vulnerability exists in the MediaRecorder API of Webkit WebKitGTK 2.40.5. A specially crafted web page can abuse this vulnerability to cause memory corruption and potentially

HighPUBLISHEDCNA: talos
CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
View raw JSON

02 Description

A use-after-free vulnerability exists in the MediaRecorder API of Webkit WebKitGTK 2.40.5. A specially crafted web page can abuse this vulnerability to cause memory corruption and potentially

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
1.44% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 72.7% 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
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
2023-10-06 15:17Z3 YR AGO
Last updated
2025-11-04 19:17Z11 MO AGO
Reserved
2023-08-14
Assigning CNA
talos
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
5.2
Document digest
8835bdb85e013282ddd09e4f035ddb4a9af81259a558709411ce3e55b64a401b

05 Affected products

VendorProductVersionsPlatforms
WebkitWebkitWebKitGTK 2.40.5—

06 References

07 Fixed in

AlmaLinux 8

  • webkit2gtk3
    Fixed in 2.42.5-1.el8
  • webkit2gtk3-devel
    Fixed in 2.42.5-1.el8
  • webkit2gtk3-jsc
    Fixed in 2.42.5-1.el8
  • webkit2gtk3-jsc-devel
    Fixed in 2.42.5-1.el8

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • webkit2gtk3
    Fixed in 2.42.5-1.el9
  • webkit2gtk3-devel
    Fixed in 2.42.5-1.el9
  • webkit2gtk3-jsc
    Fixed in 2.42.5-1.el9
  • webkit2gtk3-jsc-devel
    Fixed in 2.42.5-1.el9

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • webkit2gtk3
    Fixed in 2.42.5-1.el8
  • webkit2gtk3-devel
    Fixed in 2.42.5-1.el8
  • webkit2gtk3-jsc
    Fixed in 2.42.5-1.el8
  • webkit2gtk3-jsc-devel
    Fixed in 2.42.5-1.el8

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.

CloudLinux 9

  • webkit2gtk3
    Fixed in 2.42.5-1.el9
  • webkit2gtk3-devel
    Fixed in 2.42.5-1.el9
  • webkit2gtk3-jsc
    Fixed in 2.42.5-1.el9
  • webkit2gtk3-jsc-devel
    Fixed in 2.42.5-1.el9

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 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 2.42.1-1~deb12u1
  • wpewebkit
    No fix yet

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

Debian 13

  • webkit2gtk
    Fixed in 2.42.0-1
  • wpewebkit
    Fixed in 2.42.0-1

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

Debian 14

  • webkit2gtk
    Fixed in 2.42.0-1
  • wpewebkit
    Fixed in 2.42.0-1

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
    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 20.04 LTS

  • qtwebkit-opensource-src
    No fix yet
  • webkit2gtk
    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 22.04 LTS

  • qtwebkit-opensource-src
    No fix yet
  • webkit2gtk
    Fixed in 2.42.1-0ubuntu0.22.04.1
  • wpewebkit
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 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.