CRITICAL
Mozilla: Memory safety bugs fixed in Firefox 66 and Firefox ESR 60.6
Published Apr 26, 2019
9.8
CRITICALCVSS 3.1
EPSS 2.24%
Description
Mozilla developers and community members reported memory safety bugs present in Firefox 65, Firefox ESR 60.5, and Thunderbird 60.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<66
- Version
-
- Version unspecifiedStatusaffectedConstraints<60.6
- Version
-
- Version unspecifiedStatusaffectedConstraints<60.6
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox | n/a |
| ||||||
| Mozilla | Firefox ESR | n/a |
| ||||||
| Mozilla | Thunderbird | n/a |
|
Configuration 1
Configuration 2
OR
- 8.0
- 8.1
- 8.2
- 8.4
- 8.2
- 8.4
- 8.2
- 8.4
No data.
Red Hat Enterprise Linux 6
firefox-0:60.6.0-3.el6_10
Fixed · RHSA-2019:0623
Red Hat Enterprise Linux 6
thunderbird-0:60.6.1-1.el6_10
Fixed · RHSA-2019:0680
Red Hat Enterprise Linux 7
firefox-0:60.6.0-3.el7_6
Fixed · RHSA-2019:0622
Red Hat Enterprise Linux 7
thunderbird-0:60.6.1-1.el7_6
Fixed · RHSA-2019:0681
Red Hat Enterprise Linux 8
firefox-0:60.6.1-1.el8
Fixed · RHSA-2019:0966
Red Hat Enterprise Linux 8
thunderbird-0:60.6.1-1.el8
Fixed · RHSA-2019:1144
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | firefox-0:60.6.0-3.el6_10 | Fixed | RHSA-2019:0623 |
| Red Hat Enterprise Linux 6 | thunderbird-0:60.6.1-1.el6_10 | Fixed | RHSA-2019:0680 |
| Red Hat Enterprise Linux 7 | firefox-0:60.6.0-3.el7_6 | Fixed | RHSA-2019:0622 |
| Red Hat Enterprise Linux 7 | thunderbird-0:60.6.1-1.el7_6 | Fixed | RHSA-2019:0681 |
| Red Hat Enterprise Linux 8 | firefox-0:60.6.1-1.el8 | Fixed | RHSA-2019:0966 |
| Red Hat Enterprise Linux 8 | thunderbird-0:60.6.1-1.el8 | Fixed | RHSA-2019:1144 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
9.8 CRITICAL Red Hat
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.24% 0.02244
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.02244
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (50 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 2.24% (0.02244) | 82.27th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.24% (0.02244) | 80.52th | v5 (v2026.06.15) |
| Mar 4, 2026 | 2.15% (0.02148) | 83.94th | v4 (v2025.03.14) |
| Mar 1, 2026 | 0.74% (0.00742) | 72.76th | v4 (v2025.03.14) |
| Feb 4, 2026 | 2.19% (0.02189) | 84.00th | v4 (v2025.03.14) |
| Feb 1, 2026 | 0.76% (0.00756) | 72.93th | v4 (v2025.03.14) |
| Jan 4, 2026 | 2.19% (0.02189) | 83.92th | v4 (v2025.03.14) |
| Jan 1, 2026 | 0.76% (0.00756) | 72.85th | v4 (v2025.03.14) |
| Dec 4, 2025 | 2.19% (0.02189) | 83.84th | v4 (v2025.03.14) |
| Dec 1, 2025 | 0.76% (0.00756) | 72.57th | v4 (v2025.03.14) |
| Nov 4, 2025 | 2.19% (0.02189) | 83.82th | v4 (v2025.03.14) |
| Nov 1, 2025 | 0.76% (0.00756) | 72.62th | v4 (v2025.03.14) |
| Oct 4, 2025 | 2.19% (0.02189) | 83.79th | v4 (v2025.03.14) |
| Oct 1, 2025 | 0.76% (0.00756) | 72.50th | v4 (v2025.03.14) |
| Sep 4, 2025 | 2.19% (0.02189) | 83.75th | v4 (v2025.03.14) |
| Sep 1, 2025 | 0.76% (0.00756) | 72.44th | v4 (v2025.03.14) |
| Aug 4, 2025 | 2.19% (0.02189) | 83.72th | v4 (v2025.03.14) |
| Aug 1, 2025 | 0.76% (0.00756) | 72.42th | v4 (v2025.03.14) |
| Jul 4, 2025 | 2.19% (0.02189) | 83.69th | v4 (v2025.03.14) |
| Jul 1, 2025 | 0.76% (0.00756) | 72.35th | v4 (v2025.03.14) |
| Jun 4, 2025 | 2.19% (0.02189) | 83.57th | v4 (v2025.03.14) |
| Jun 1, 2025 | 0.76% (0.00756) | 72.18th | v4 (v2025.03.14) |
| May 4, 2025 | 2.19% (0.02189) | 83.48th | v4 (v2025.03.14) |
| May 1, 2025 | 0.76% (0.00756) | 72.06th | v4 (v2025.03.14) |
| Apr 18, 2025 | 2.19% (0.02189) | 83.46th | v4 (v2025.03.14) |
| Apr 17, 2025 | 0.76% (0.00756) | 71.94th | v4 (v2025.03.14) |
| Apr 11, 2025 | 2.19% (0.02189) | 83.02th | v4 (v2025.03.14) |
| Apr 10, 2025 | 0.76% (0.00756) | 71.06th | v4 (v2025.03.14) |
| Apr 8, 2025 | 2.19% (0.02189) | 82.98th | v4 (v2025.03.14) |
| Apr 7, 2025 | 0.76% (0.00756) | 71.04th | v4 (v2025.03.14) |
| Apr 4, 2025 | 2.19% (0.02189) | 82.97th | v4 (v2025.03.14) |
| Apr 3, 2025 | 0.76% (0.00756) | 71.04th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.20% (0.02198) | 82.93th | v4 (v2025.03.14) |
| Mar 29, 2025 | 7.52% (0.07521) | 86.05th | v4 (v2025.03.14) |
| Mar 28, 2025 | 0.76% (0.00761) | 71.04th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.20% (0.02198) | 83.27th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.67% (0.00673) | 80.05th | v3 (v2023.03.01) |
| Apr 19, 2024 | 0.67% (0.00673) | 79.60th | v3 (v2023.03.01) |
| Aug 20, 2023 | 0.88% (0.00881) | 80.42th | v3 (v2023.03.01) |
| Apr 2, 2023 | 0.89% (0.00893) | 80.23th | v3 (v2023.03.01) |
| Mar 17, 2023 | 0.78% (0.00782) | 78.68th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.81% (0.00814) | 79.17th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.11% (0.01108) | 53.57th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.11% (0.01108) | 51.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 12.30% (0.12300) | 89.42th | v2 (v2022.01.01) |
| Feb 3, 2022 | 5.12% (0.05124) | 78.68th | v1 |
| Jan 6, 2022 | 5.12% (0.05124) | 78.47th | v1 |
| Sep 1, 2021 | 1.19% (0.01189) | 67.14th | v1 |
| Apr 14, 2021 | 1.19% (0.01189) | 0.00th | v1 |
Weaknesses (2)
References (11)
- https://access.redhat.com/errata/RHSA-2019:0966 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1144 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2019-9788 Vendor Advisory
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1518001%2C1521304%2C1521214%2C1506665%2C1516834%2C1518774%2C1524755%2C1523362%2C1524214%2C1529203 x_refsource_MISCIssue TrackingVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1690674 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2019-9788
- https://www.cve.org/CVERecord?id=CVE-2019-9788
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-08/#CVE-2019-9788
- https://www.mozilla.org/security/advisories/mfsa2019-07/ x_refsource_MISCVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-08/ x_refsource_MISCVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-11/ x_refsource_MISCVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2019:0966 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/errata/RHSA-2019:1144 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2019-9788 | Vendor Advisory | |
| https://bugzilla.mozilla.org/buglist.cgi?bug_id=1518001%2C1521304%2C1521214%2C1506665%2C1516834%2C1518774%2C1524755%2C1523362%2C1524214%2C1529203 | x_refsource_MISCIssue TrackingVendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1690674 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2019-9788 | ||
| https://www.cve.org/CVERecord?id=CVE-2019-9788 | ||
| https://www.mozilla.org/en-US/security/advisories/mfsa2019-08/#CVE-2019-9788 | ||
| https://www.mozilla.org/security/advisories/mfsa2019-07/ | x_refsource_MISCVendor Advisory | |
| https://www.mozilla.org/security/advisories/mfsa2019-08/ | x_refsource_MISCVendor Advisory | |
| https://www.mozilla.org/security/advisories/mfsa2019-11/ | x_refsource_MISCVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mozilla
Published Apr 26, 2019
Updated Aug 4, 2024
Reserved Mar 14, 2019
Link CVE-2019-9788
CISA Vulnrichment
Updated n/a