Out-of-bounds write in Mozilla Thunderbird
Priority MEDIUM 42CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 11 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.
Summary
Members the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 103, Firefox ESR 102.1, and Firefox ESR 91.12. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 102.2, Thunderbird < 91.13, Firefox ESR < 91.13, Firefox ESR < 102.2, and Firefox < 104.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0094 61st percentileScored 2026-11-07
Fix Partial Thunderbird (Mozilla): 102.2, 91.13Firefox ESR (Mozilla): 91.13, 102.2+1 more productRed Hat: 12 advisoriesRed Hat: 11 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
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 | Thunderbird | before 102.2; before 91.13 | 102.2, 91.13 | Patch available | CNA |
| Mozilla | Firefox ESR | before 91.13; before 102.2 | 91.13, 102.2 | Patch available | CNA |
| Mozilla | Firefox | before 104 | 104 | Patch available | CNA |
- Thunderbird VendorMozilla Affected before 102.2; before 91.13 Fixed in 102.2, 91.13 Patch available CNA
- Firefox ESR VendorMozilla Affected before 91.13; before 102.2 Fixed in 91.13, 102.2 Patch available CNA
- Firefox VendorMozilla Affected before 104 Fixed in 104 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 104.0; 102.0 to before 102.2 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* | before 91.13 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 91.13; 102.0 to before 102.2 | Vulnerable | Mozilla |
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 104.0; 102.0 to before 102.2 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 91.13 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 91.13; 102.0 to before 102.2 Vulnerable ·Mozilla
Remediation
- Fix · CNA Thunderbird (Mozilla) Fixed in 102.2, 91.13
- Fix · CNA Firefox ESR (Mozilla) Fixed in 91.13, 102.2
- Fix · CNA Firefox (Mozilla) Fixed in 104
Red Hat 12 advisories
- RHSA-2022:6179 Released 2022-08-24 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux Client (v. 7) firefox-91.13.0-1.el7_9
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-91.13.0-1.el7_9
- Red Hat Enterprise Linux Server (v. 7) firefox-91.13.0-1.el7_9
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-91.13.0-1.el7_9
- Red Hat Enterprise Linux Workstation (v. 7) firefox-91.13.0-1.el7_9
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-91.13.0-1.el7_9
- RHSA-2022:6169 Released 2022-08-24 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Client (v. 7) thunderbird-91.13.0-1.el7_9
- Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-91.13.0-1.el7_9
- Red Hat Enterprise Linux Workstation (v. 7) thunderbird-91.13.0-1.el7_9
- RHSA-2022:6177 Released 2022-08-24 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream EUS (v. 8.2) firefox-91.13.0-1.el8_2
Show 9 more Red Hat advisories
- RHSA-2022:6164 Released 2022-08-24 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream (v. 8) thunderbird-91.13.0-1.el8_6
- RHSA-2022:6175 Released 2022-08-24 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream (v. 8) firefox-91.13.0-1.el8_6
- RHSA-2022:6174 Released 2022-08-24 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream (v. 9) firefox-91.13.0-1.el9_0
- RHSA-2022:6178 Released 2022-08-24 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-91.13.0-1.el8_1
- RHSA-2022:6176 Released 2022-08-24 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream EUS (v.8.4) firefox-91.13.0-1.el8_4
- RHSA-2022:6168 Released 2022-08-24 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream EUS (v. 8.2) thunderbird-91.13.0-1.el8_2
- RHSA-2022:6167 Released 2022-08-24 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-91.13.0-1.el8_1
- RHSA-2022:6166 Released 2022-08-24 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-91.13.0-1.el8_4
- RHSA-2022:6165 Released 2022-08-24 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream (v. 9) thunderbird-91.13.0-1.el9_0
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Mozilla Firefox 104
6 records Highest priority Priority MEDIUM 3 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2022-18099 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 42
- TI-2022-18095 A cross-origin iframe referencing an XSLT document would inherit the parent domain's…Priority MEDIUM 41
- TI-2022-18097 Incorrect authorization in Mozilla FirefoxPriority LOW 29
- Release ·
Mozilla Firefox ESR, Thunderbird 102.2, 91.13
3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2022-18095 A cross-origin iframe referencing an XSLT document would inherit the parent domain's…Priority MEDIUM 41
- TI-2022-18094 Origin validation error in Mozilla ThunderbirdPriority LOW 29
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-2022:6164, RHSA-2022:6175 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2022:6165, RHSA-2022:6174 |
| Red Hat Enterprise Linux AppStream E4S (v. 8.1) | Fixed | RHSA-2022:6167, RHSA-2022:6178 |
| Red Hat Enterprise Linux AppStream EUS (v. 8.2) | Fixed | RHSA-2022:6168, RHSA-2022:6177 |
| Red Hat Enterprise Linux AppStream EUS (v.8.4) | Fixed | RHSA-2022:6166, RHSA-2022:6176 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2022:6169, RHSA-2022:6179 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2022:6179 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2022:6179 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2022:6169, RHSA-2022:6179 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2022:6169, RHSA-2022:6179 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2022:6179 |
Timeline
- 2026-10-02 Threatist record created from CVE-2022-38478
- 2026-10-03 Alias added: GHSA-c5f3-h7xh-cf2f
References
Advisory 6
- https://www.mozilla.org/security/advisories/mfsa2022-35/
- https://www.mozilla.org/security/advisories/mfsa2022-33/
- https://www.mozilla.org/security/advisories/mfsa2022-37/
- https://www.mozilla.org/security/advisories/mfsa2022-36/
- https://www.mozilla.org/security/advisories/mfsa2022-34/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1770630%2C1776658
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-2022-38478 · CVE Program
- CVE-2022-38478 · NVD
- FIRST EPSS
- GHSA-c5f3-h7xh-cf2f · GitHub Advisory Database · CC BY 4.0
- CVE-2022-38478 · Red Hat security data · CC BY 4.0
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