Out-of-bounds write in Mozilla Firefox
Priority LOW 31CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 17 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.
Summary
A compromised content process could have provided malicious data in a `PathRecording` resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process. This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01095 65th percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 118Firefox ESR (Mozilla): 115.3+1 more productRed Hat: 16 advisoriesRed Hat: 17 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Mozilla | Firefox | before 118 | 118 | Patch available | CNA |
| Mozilla | Firefox ESR | before 115.3 | 115.3 | Patch available | CNA |
| Mozilla | Thunderbird | before 115.3 | 115.3 | Patch available | CNA |
- Firefox VendorMozilla Affected before 118 Fixed in 118 Patch available CNA
- Firefox ESR VendorMozilla Affected before 115.3 Fixed in 115.3 Patch available CNA
- Thunderbird VendorMozilla Affected before 115.3 Fixed in 115.3 Patch available CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 118 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* | before 115.3 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 115.3 | Vulnerable | Mozilla |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* | 12.0 | Vulnerable | Debian |
| cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* | 39 | Vulnerable | Fedoraproject |
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 118 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 115.3 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 115.3 Vulnerable ·Mozilla
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Debian
- cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* Versions 39 Vulnerable ·Fedoraproject
Remediation
- Fix · CNA Firefox (Mozilla) Fixed in 118
- Fix · CNA Firefox ESR (Mozilla) Fixed in 115.3
- Fix · CNA Thunderbird (Mozilla) Fixed in 115.3
Red Hat 16 advisories
- RHSA-2023:5475 Released 2023-10-05 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Client (v. 7) thunderbird-115.3.1-1.el7_9
- Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-115.3.1-1.el7_9
- Red Hat Enterprise Linux Workstation (v. 7) thunderbird-115.3.1-1.el7_9
- RHSA-2023:5477 Released 2023-10-05 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux Client (v. 7) firefox-115.3.1-1.el7_9
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-115.3.1-1.el7_9
- 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
- Red Hat Enterprise Linux Workstation (v. 7) firefox-115.3.1-1.el7_9
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-115.3.1-1.el7_9
- RHSA-2023:5429 Released 2023-10-04 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-115.3.1-1.el8_4
- Red Hat Enterprise Linux AppStream E4S (v.8.4) thunderbird-115.3.1-1.el8_4
- Red Hat Enterprise Linux AppStream TUS (v.8.4) thunderbird-115.3.1-1.el8_4
Show 13 more Red Hat advisories
- RHSA-2023:5434 Released 2023-10-04 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream (v. 9) firefox-115.3.1-1.el9_2, firefox-x11-115.3.1-1.el9_2
- RHSA-2023:5438 Released 2023-10-04 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-115.3.1-1.el8_1
- RHSA-2023:5426 Released 2023-10-04 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox-115.3.1-1.el8_2
- Red Hat Enterprise Linux AppStream E4S (v. 8.2) firefox-115.3.1-1.el8_2
- Red Hat Enterprise Linux AppStream TUS (v. 8.2) firefox-115.3.1-1.el8_2
- RHSA-2023:5432 Released 2023-10-04 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-115.3.1-1.el8_2
- Red Hat Enterprise Linux AppStream E4S (v. 8.2) thunderbird-115.3.1-1.el8_2
- Red Hat Enterprise Linux AppStream TUS (v. 8.2) thunderbird-115.3.1-1.el8_2
- RHSA-2023:5433 Released 2023-10-04 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream (v. 8) firefox-115.3.1-1.el8_8
- RHSA-2023:5437 Released 2023-10-04 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox-115.3.1-1.el8_4
- Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox-115.3.1-1.el8_4
- Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox-115.3.1-1.el8_4
- RHSA-2023:5440 Released 2023-10-04 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-115.3.1-1.el8_1
- RHSA-2023:5439 Released 2023-10-04 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream EUS (v.9.0) thunderbird-115.3.1-1.el9_0
- RHSA-2023:5436 Released 2023-10-04 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox-115.3.1-1.el8_6
- RHSA-2023:5435 Released 2023-10-04 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream (v. 9) thunderbird-115.3.1-1.el9_2
- RHSA-2023:5430 Released 2023-10-04 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream EUS (v.8.6) thunderbird-115.3.1-1.el8_6
- RHSA-2023:5428 Released 2023-10-04 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream (v. 8) thunderbird-115.3.1-1.el8_8
- RHSA-2023:5427 Released 2023-10-04 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox-115.3.1-1.el9_0
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Mozilla Firefox 118
9 records Highest priority Priority MEDIUM 5 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2023-04764 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 52
- TI-2023-04763 Use after free in Mozilla FirefoxPriority MEDIUM 51
- TI-2023-04762 Use after free in Mozilla FirefoxPriority MEDIUM 51
- Release ·
Mozilla Firefox ESR, Thunderbird 115.3
5 records Highest priority Priority MEDIUM 3 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2023-04764 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 52
- TI-2023-04762 Use after free in Mozilla FirefoxPriority MEDIUM 51
- TI-2023-04756 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 51
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2023:5428, RHSA-2023:5433 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:5434, RHSA-2023:5435 |
| Red Hat Enterprise Linux AppStream AUS (v. 8.2) | Fixed | RHSA-2023:5426, RHSA-2023:5432 |
| Red Hat Enterprise Linux AppStream AUS (v.8.4) | Fixed | RHSA-2023:5429, RHSA-2023:5437 |
| Red Hat Enterprise Linux AppStream E4S (v. 8.1) | Fixed | RHSA-2023:5438, RHSA-2023:5440 |
| Red Hat Enterprise Linux AppStream E4S (v. 8.2) | Fixed | RHSA-2023:5426, RHSA-2023:5432 |
| Red Hat Enterprise Linux AppStream E4S (v.8.4) | Fixed | RHSA-2023:5429, RHSA-2023:5437 |
| Red Hat Enterprise Linux AppStream EUS (v.8.6) | Fixed | RHSA-2023:5430, RHSA-2023:5436 |
| Red Hat Enterprise Linux AppStream EUS (v.9.0) | Fixed | RHSA-2023:5427, RHSA-2023:5439 |
| Red Hat Enterprise Linux AppStream TUS (v. 8.2) | Fixed | RHSA-2023:5426, RHSA-2023:5432 |
| Red Hat Enterprise Linux AppStream TUS (v.8.4) | Fixed | RHSA-2023:5429, RHSA-2023:5437 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2023:5475, RHSA-2023:5477 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2023:5477 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2023:5477 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2023:5475, RHSA-2023:5477 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2023:5475, RHSA-2023:5477 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2023:5477 |
Timeline
- 2026-10-02 Threatist record created from CVE-2023-5169
- 2026-10-03 Alias added: GHSA-65f9-wqxf-mh9r
References
Patch 2
Advisory 6
- https://www.mozilla.org/security/advisories/mfsa2023-41/
- https://www.mozilla.org/security/advisories/mfsa2023-42/
- https://www.mozilla.org/security/advisories/mfsa2023-43/
- https://www.debian.org/security/2023/dsa-5513
- https://lists.fedoraproject.org/archives/list/[email protected]/message/AY642Z6JZODQJE7Z62CFREVUHEGCXGPD/
- https://lists.debian.org/debian-lts-announce/2023/10/msg00015.html
More Mozilla Firefox vulnerabilities
- TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
- TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
- TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
- TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
- TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
- TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2023-5169 · CVE Program
- CVE-2023-5169 · NVD
- FIRST EPSS
- GHSA-65f9-wqxf-mh9r · GitHub Advisory Database · CC BY 4.0
- CVE-2023-5169 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences