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Fencer Vulns
high 8.8

CVE-2023-5217 kev in the critical feed json

Electron affected by libvpx's heap buffer overflow in vp8 encoding

published 2023-09-28 3 y ago modified 2026-09-10 1 mo ago also EUVD-2023-2578 , GHSA-qqvq-6xgj-jw8g , JLSEC-2026-375

cvss
8.8
version 3.1, CNA
cisa kev
Exploited
added 2023-10-02
epss
49.0%
EPSS 49.0% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

Heap buffer overflow in vp8 encoding in libvpx in Google Chrome prior to 117.0.5938.132 and libvpx 1.13.1 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

Patch / fix

cisa required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

  • npm electron 22.3.25, 24.8.5, 25.8.4, 26.2.4, 27.0.0-beta.8
  • julia LibVPX_jll 1.15.2+0
  • webmproject libvpx 1.13.1
  • mozilla firefox 115.3.1, 118.0.1, 118.1
  • mozilla thunderbird 115.3.1
  • google chrome 117.0.5938.132
  • apple ipados 17.0.3
  • apple iphone_os 17.0.3
  • libvpx Debian 12 1.12.0-1+deb12u1
  • libvpx Debian 14, Debian 13 1.12.0-1.1
  • chromium Debian 12 117.0.5938.132-1~deb12u1
  • chromium Debian 14, Debian 13 117.0.5938.132-1
  • thunderbird Debian 12 1:115.3.1-1~deb12u1
  • thunderbird Debian 14, Debian 13 1:115.3.1-1

debian advisories DEBIAN-CVE-2023-5217

  • libvpx Ubuntu 20.04 LTS 1.8.2-1ubuntu0.2
  • libvpx Ubuntu 22.04 LTS 1.11.0-2ubuntu2.2
  • firefox Ubuntu 20.04 LTS 118.0.1+build1-0ubuntu0.20.04.1
  • thunderbird Ubuntu 20.04 LTS 1:115.3.1+build1-0ubuntu0.20.04.1
  • thunderbird Ubuntu 22.04 LTS 1:115.3.1+build1-0ubuntu0.22.04.2
  • thunderbird Ubuntu 24.04 LTS 1:115.3.1+build1-0ubuntu1
  • libvpx Ubuntu Pro 14.04 LTS 1.3.0-2ubuntu0.1~esm3
  • libvpx Ubuntu Pro 16.04 LTS 1.5.0-2ubuntu1.1+esm2

ubuntu advisories UBUNTU-CVE-2023-5217

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libvpx RHEL 8 1.7.0-10.el8_8
  • libvpx RHEL 9 1.9.0-7.el9_2
  • firefox RHEL 8 115.3.1-1.el8_8
  • thunderbird RHEL 8 115.3.1-1.el8_8
  • thunderbird RHEL 7 115.3.1-1.el7_9
  • firefox RHEL 7 115.3.1-1.el7_9
  • thunderbird RHEL 9 115.3.1-1.el9_2
  • firefox RHEL 9 115.3.1-1.el9_2

red hat advisories RHSA-2023:5537RHSA-2023:5535RHSA-2023:5538RHSA-2023:5539RHSA-2023:5534RHSA-2023:5536

  • MozillaThunderbird SLE Workstation Extension 15 SP5, SLE Workstation Extension 15 SP4, SLE Module for Package Hub 15 SP5 +3 more 115.3.1-150200.8.133.1
  • MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 115.3.1-112.185.1
  • MozillaFirefox SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +9 more 115.3.1-150200.152.111.1
  • libvpx SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES for SAP 15 SP1 +13 more 1.6.1-150000.6.11.1
  • libvpx SLE Module for Package Hub 15 SP5, SLE Module for Package Hub 15 SP4, SLE Module for Basesystem 15 SP5 +3 more 1.11.0-150400.3.3.1
  • libvpx SLES for SAP 12 SP5, SLES 12 SP5, SLE Workstation Extension 12 SP5 +1 more 1.3.0-3.12.1
  • MozillaFirefox SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 115.3.1-150000.150.110.1

suse advisories SUSE-SU-2023:4016-1SUSE-SU-2023:3950-1SUSE-SU-2023:3949-1SUSE-SU-2023:3948-1SUSE-SU-2023:3946-1SUSE-SU-2023:3941-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • chromium openSUSE Tumbleweed 117.0.5938.132-1.1
  • MozillaFirefox openSUSE Tumbleweed 118.0.1-1.1
  • libvpx openSUSE Tumbleweed 1.13.0-2.1
  • MozillaThunderbird openSUSE Tumbleweed 115.3.1-1.1
  • nodejs-electron openSUSE Tumbleweed 25.8.4-2.1
  • vlc openSUSE Tumbleweed 3.0.19-1.1
  • element-desktop openSUSE Tumbleweed 1.11.47-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:13269-1openSUSE-SU-2024:13272-1openSUSE-SU-2024:13274-1openSUSE-SU-2024:13276-1openSUSE-SU-2024:13277-1

  • libvpx AlmaLinux 8 1.7.0-10.el8_8.alma.1
  • libvpx AlmaLinux 9 1.9.0-7.el9_2.alma.1
  • firefox AlmaLinux 9 115.3.1-1.el9_2.alma.1
  • firefox-x11 AlmaLinux 9 115.3.1-1.el9_2.alma.1
  • thunderbird AlmaLinux 9 115.3.1-1.el9_2.alma

almalinux advisories ALSA-2023:5537ALSA-2023:5539ALSA-2023:5434ALSA-2023:5435

  • libvpx Rocky Linux 8 1.7.0-10.el8_8
  • thunderbird Rocky Linux 9 115.3.1-1.el9_2
  • thunderbird Rocky Linux 8 115.3.1-1.el8_8

rocky linux advisories RLSA-2023:5537RLSA-2023:5435RLSA-2023:5428

  • libvpx Alpine 3.17 1.12.0-r2
  • libvpx Alpine 3.18 1.13.0-r2
  • libvpx Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 1.13.0-r3
  • firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +3 more 115.3.1-r0
  • qt5-qtwebengine Alpine 3.18 5.15.13-r9
  • qt5-qtwebengine Alpine 3.23, Alpine 3.22, Alpine 3.21 +2 more 5.15.15-r3

alpine advisories ALPINE-CVE-2023-5217

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-5217 updated cvss 8.8

libvpx: Heap buffer overflow in vp8 encoding in libvpx

  • Red Hat Enterprise Linux 6 libvpx, libvpx-utils
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 firefox, firefox-x11, thunderbird
    affected: workaround, no fix available
  • Red Hat CodeReady Linux Builder EUS (v.8.6) libvpx-devel 1.7.0-10.el8_6, libvpx-debuginfo 1.7.0-10.el8_6, libvpx-debugsource 1.7.0-10.el8_6, libvpx-utils-debuginfo 1.7.0-10.el8_6
    fixed: vendor fix RHSA-2023:5538
  • Red Hat CodeReady Linux Builder EUS (v.9.0) libvpx-devel 1.9.0-7.el9_0, libvpx-debuginfo 1.9.0-7.el9_0, libvpx-debugsource 1.9.0-7.el9_0, libvpx-utils-debuginfo 1.9.0-7.el9_0
    fixed: vendor fix RHSA-2023:5540
  • Red Hat Enterprise Linux AppStream (v. 8) libvpx 1.7.0-10.el8_8, firefox 115.3.1-1.el8_8, thunderbird 115.3.1-1.el8_8
    fixed: vendor fix RHSA-2023:5433
  • Red Hat Enterprise Linux AppStream (v. 9) libvpx 1.9.0-7.el9_2, firefox 115.3.1-1.el9_2, firefox-x11 115.3.1-1.el9_2, thunderbird 115.3.1-1.el9_2
    fixed: vendor fix RHSA-2023:5434
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) libvpx 1.7.0-8.el8_2, firefox 115.3.1-1.el8_2, thunderbird 115.3.1-1.el8_2
    fixed: vendor fix RHSA-2023:5426
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) libvpx 1.7.0-10.el8_4, firefox 115.3.1-1.el8_4, thunderbird 115.3.1-1.el8_4
    fixed: vendor fix RHSA-2023:5437
show 12 more
  • Red Hat Enterprise Linux AppStream E4S (v. 8.1) libvpx 1.7.0-8.el8_1, firefox 115.3.1-1.el8_1, thunderbird 115.3.1-1.el8_1
    fixed: vendor fix RHSA-2023:5440
  • Red Hat Enterprise Linux AppStream E4S (v. 8.2) libvpx 1.7.0-8.el8_2, firefox 115.3.1-1.el8_2, thunderbird 115.3.1-1.el8_2
    fixed: vendor fix RHSA-2023:5426
  • Red Hat Enterprise Linux AppStream E4S (v.8.4) libvpx 1.7.0-10.el8_4, firefox 115.3.1-1.el8_4, thunderbird 115.3.1-1.el8_4
    fixed: vendor fix RHSA-2023:5437
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) libvpx 1.7.0-10.el8_6, firefox 115.3.1-1.el8_6, thunderbird 115.3.1-1.el8_6
    fixed: vendor fix RHSA-2023:5436
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) libvpx 1.9.0-7.el9_0, firefox 115.3.1-1.el9_0, thunderbird 115.3.1-1.el9_0
    fixed: vendor fix RHSA-2023:5427
  • Red Hat Enterprise Linux AppStream TUS (v. 8.2) libvpx 1.7.0-8.el8_2, firefox 115.3.1-1.el8_2, thunderbird 115.3.1-1.el8_2
    fixed: vendor fix RHSA-2023:5426
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) libvpx 1.7.0-10.el8_4, firefox 115.3.1-1.el8_4, thunderbird 115.3.1-1.el8_4
    fixed: vendor fix RHSA-2023:5437
  • Red Hat Enterprise Linux Client (v. 7) firefox 115.3.1-1.el7_9, thunderbird 115.3.1-1.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) firefox 115.3.1-1.el7_9
    fixed: vendor fix RHSA-2023:5477
  • Red Hat Enterprise Linux CRB (v. 8) libvpx-devel 1.7.0-10.el8_8, libvpx-debuginfo 1.7.0-10.el8_8, libvpx-debugsource 1.7.0-10.el8_8, libvpx-utils-debuginfo 1.7.0-10.el8_8
    fixed: vendor fix RHSA-2023:5537
  • Red Hat Enterprise Linux CRB (v. 9) libvpx-devel 1.9.0-7.el9_2, libvpx-debuginfo 1.9.0-7.el9_2, libvpx-debugsource 1.9.0-7.el9_2, libvpx-utils-debuginfo 1.9.0-7.el9_2
    fixed: vendor fix RHSA-2023:5539
  • Red Hat Enterprise Linux Server (v. 7) firefox 115.3.1-1.el7_9 Red Hat Enterprise Linux Server Optional (v. 7) firefox 115.3.1-1.el7_9, thunderbird 115.3.1-1.el7_9 Red Hat Enterprise Linux Workstation (v. 7) firefox 115.3.1-1.el7_9, thunderbird 115.3.1-1.el7_9 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 115.3.1-1.el7_9
    fixed: vendor fix RHSA-2023:5477
  • Red Hat Enterprise Linux 7 libvpx, libvpx-utils
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-25-203-04 updated cvss 8.8

Schneider Electric EcoStruxure Power Operation (Update A)

  • Schneider Electric EcoStruxure Power Operation (EPO) 2022 <=CU6 Schneider Electric EcoStruxure Power Operation (EPO) 2024 <=CU1
    affected: mitigation “If users choose not to apply the remediation mentioned above, Schneider Electric recommends the following:” community.se.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Timeline

  1. Found exploited as a 0-day (Project Zero)
  2. 0-day patched (Project Zero)
  3. Published
  4. Added to CISA KEV
  5. CISA patch deadline
  6. CISA SSVC: exploitation active

Known exploited

Added
3 y ago
Patch by
2023-10-23 (3 y ago)
Ransomware
Not known
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor, product
Google, Chromium libvpx
CISA name
Google Chromium libvpx Heap Buffer Overflow Vulnerability

Zero-day

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Found
2023-09-25
Patched
2023-09-27
Details
project zero tracker

ATT&CK techniques

How it is exploited and what it leads to, in MITRE ATT&CK terms.

  • T1204.001 Malicious Link exploitation
  • T1574 Hijack Execution Flow primary impact

kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

49.01% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • crbug.com https://crbug.com/1486441 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
OSV 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
npm electron
<22.3.25
>=24.0.0, <24.8.5
>=25.0.0, <25.8.4
>=26.0.0, <26.2.4
>=27.0.0-alpha.1, <27.0.0-beta.8
22.3.25
24.8.5
25.8.4
26.2.4
27.0.0-beta.8
julia LibVPX_jll
<1.15.2+0
1.15.2+0

Affected products

  • Google Chrome
  • Google libvpx

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.