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Fencer Vulns
high 7.5

CVE-2023-5728 json

During garbage collection extra operations were performed on a object that should not be.

published 2023-10-24 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-58014

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

During garbage collection extra operations were performed on a object that should not be. This could have led to a potentially exploitable crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

Patch / fix

  • Mozilla Firefox 119
  • Mozilla Firefox ESR 115.4
  • Mozilla Thunderbird 115.4.1
  • firefox-esr Debian 12 115.4.0esr-1~deb12u1
  • firefox-esr Debian 14, Debian 13 115.4.0esr-1
  • thunderbird Debian 12 1:115.4.1-1~deb12u1
  • thunderbird Debian 14, Debian 13 1:115.4.1-1

debian advisories DEBIAN-CVE-2023-5728

  • firefox Ubuntu 20.04 LTS 119.0+build2-0ubuntu0.20.04.1
  • thunderbird Ubuntu 20.04 LTS 1:115.4.1+build1-0ubuntu0.20.04.1
  • thunderbird Ubuntu 22.04 LTS 1:115.4.1+build1-0ubuntu0.22.04.1
  • thunderbird Ubuntu 24.04 LTS 1:115.4.1+build1-0ubuntu1

ubuntu advisories UBUNTU-CVE-2023-5728

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

  • firefox RHEL 8 115.4.0-1.el8_8
  • firefox RHEL 9 115.4.0-1.el9_2
  • firefox-x11 RHEL 9 115.4.0-1.el9_2
  • thunderbird RHEL 8 115.4.1-1.el8_8
  • thunderbird RHEL 9 115.4.1-1.el9_2
  • firefox RHEL 7 115.4.0-1.el7_9
  • thunderbird RHEL 8.6 EUS 115.4.1-1.el8_6
  • firefox RHEL 8.2 TUS, RHEL 8.2 E4S, RHEL 8.2 AUS 115.4.0-1.el8_2

red hat advisories RHSA-2023:6195RHSA-2023:6185RHSA-2023:6187RHSA-2023:6196RHSA-2023:6186RHSA-2023:6188

  • MozillaFirefox SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +9 more 115.5.0-150200.152.117.1
  • MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 115.5.0-112.191.1
  • MozillaThunderbird SLE Workstation Extension 15 SP5, SLE Workstation Extension 15 SP4, SLE Module for Package Hub 15 SP5 +3 more 115.4.1-150200.8.136.1
  • MozillaFirefox SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +9 more 115.4.0-150200.152.114.1
  • MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 115.4.0-112.188.1
  • MozillaFirefox SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 115.5.0-150000.150.116.1
  • MozillaFirefox SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 115.4.0-150000.150.113.1

suse advisories SUSE-SU-2023:4551-1SUSE-SU-2023:4533-1SUSE-SU-2023:4532-1SUSE-SU-2023:4302-1SUSE-SU-2023:4214-1SUSE-SU-2023:4213-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaThunderbird openSUSE Tumbleweed 115.4.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 119.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:13356-1openSUSE-SU-2024:13385-1

  • firefox AlmaLinux 8 115.4.0-1.el8_8.alma.1
  • firefox AlmaLinux 9 115.4.0-1.el9_2.alma.1
  • firefox-x11 AlmaLinux 9 115.4.0-1.el9_2.alma.1
  • thunderbird AlmaLinux 9 115.4.1-1.el9_2.alma
  • thunderbird AlmaLinux 8 115.4.1-1.el8_8.alma.1

almalinux advisories ALSA-2023:6187ALSA-2023:6188ALSA-2023:6191ALSA-2023:6194

  • firefox Rocky Linux 9 115.4.0-1.el9_2

rocky linux advisories RLSA-2023:6188

  • mozjs Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 115.4.0-r0
  • firefox Alpine 3.23, Alpine 3.22, Alpine 3.21 +3 more 119.0-r0
  • mozjs115 Alpine 3.20, Alpine 3.19 115.4.0-r0
  • librewolf Alpine 3.24, Alpine 3.23, Alpine 3.22 119.0-r0
  • firefox-esr Alpine 3.18 115.5.0-r0
  • firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +2 more 115.4.0-r0
  • thunderbird Alpine 3.18 115.4.0-r0
  • thunderbird Alpine 3.23, Alpine 3.22, Alpine 3.21 +2 more 115.4.1-r0

alpine advisories ALPINE-CVE-2023-5728

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-2023-5728 updated cvss 7.5

Mozilla: Improper object tracking during GC in the JavaScript engine could have led to a crash.

  • Red Hat Enterprise Linux 6 firefox, thunderbird
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 thunderbird
    affected: no fix available
  • Red Hat Enterprise Linux AppStream (v. 8) firefox 115.4.0-1.el8_8, thunderbird 115.4.1-1.el8_8
    fixed: vendor fix RHSA-2023:6187
  • Red Hat Enterprise Linux AppStream (v. 9) firefox 115.4.0-1.el9_2, firefox-x11 115.4.0-1.el9_2, thunderbird 115.4.1-1.el9_2
    fixed: vendor fix RHSA-2023:6188
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 115.4.0-1.el8_2, thunderbird 115.4.1-1.el8_2
    fixed: vendor fix RHSA-2023:6185
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird 115.4.1-1.el8_4
    fixed: vendor fix RHSA-2023:6196
  • Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox 115.4.0-1.el8_1, thunderbird 115.4.1-1.el8_1
    fixed: vendor fix RHSA-2023:6189
  • Red Hat Enterprise Linux AppStream E4S (v. 8.2) firefox 115.4.0-1.el8_2, thunderbird 115.4.1-1.el8_2
    fixed: vendor fix RHSA-2023:6185
show 6 more
  • Red Hat Enterprise Linux AppStream E4S (v.8.4) thunderbird 115.4.1-1.el8_4
    fixed: vendor fix RHSA-2023:6196
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox 115.4.0-1.el8_6, thunderbird 115.4.1-1.el8_6
    fixed: vendor fix RHSA-2023:6186
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox 115.4.0-1.el9_0
    fixed: vendor fix RHSA-2023:6199
  • Red Hat Enterprise Linux AppStream TUS (v. 8.2) firefox 115.4.0-1.el8_2, thunderbird 115.4.1-1.el8_2
    fixed: vendor fix RHSA-2023:6185
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) thunderbird 115.4.1-1.el8_4
    fixed: vendor fix RHSA-2023:6196
  • Red Hat Enterprise Linux Client (v. 7) firefox 115.4.0-1.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) firefox 115.4.0-1.el7_9 Red Hat Enterprise Linux Server (v. 7) firefox 115.4.0-1.el7_9 Red Hat Enterprise Linux Server Optional (v. 7) firefox 115.4.0-1.el7_9 Red Hat Enterprise Linux Workstation (v. 7) firefox 115.4.0-1.el7_9 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 115.4.0-1.el7_9
    fixed: vendor fix RHSA-2023:6162

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 SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.32% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Mozilla Firefox
  • Mozilla Firefox ESR
  • Mozilla Thunderbird

Classification

Weakness

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.