Mozilla: type confusion in JavaScript
Published Oct 18, 2018
8.8
HIGHCVSS 3.0
EPSS 13.42%
Description
A vulnerability in register allocation in JavaScript can lead to type confusion, allowing for an arbitrary read and write. This leads to remote code execution inside the sandboxed content process when triggered. This vulnerability affects Firefox ESR < 60.2.2 and Firefox < 62.0.3.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<62.0.3
- Version
-
- Version unspecifiedStatusaffectedConstraints<60.2.2
- 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 |
|
Configuration 1
- 6.0
- 7.0
- 6.0
- 7.0
- 7.6
- 7.5
- 7.6
- 7.6
- 6.0
- 7.0
Configuration 2
- 9.0
Configuration 3
- 14.04
- 16.04
- 18.04
No data.
Red Hat Enterprise Linux 6
firefox-0:60.2.2-1.el6
Fixed · RHSA-2018:2881
Red Hat Enterprise Linux 7
firefox-0:60.2.2-1.el7_5
Fixed · RHSA-2018:2884
Red Hat Enterprise Linux 6
thunderbird
Not affected
Red Hat Enterprise Linux 7
thunderbird
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | firefox-0:60.2.2-1.el6 | Fixed | RHSA-2018:2881 |
| Red Hat Enterprise Linux 7 | firefox-0:60.2.2-1.el7_5 | Fixed | RHSA-2018:2884 |
| Red Hat Enterprise Linux 6 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 7 | thunderbird | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:P/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
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 (34 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 13.42% (0.13417) | 96.31th | v5 (v2026.06.15) |
| Jun 15, 2026 | 13.42% (0.13417) | 95.93th | v5 (v2026.06.15) |
| May 4, 2026 | 37.99% (0.37990) | 97.23th | v4 (v2025.03.14) |
| Dec 28, 2025 | 39.10% (0.39099) | 97.13th | v4 (v2025.03.14) |
| Dec 27, 2025 | 40.83% (0.40828) | 97.25th | v4 (v2025.03.14) |
| Nov 21, 2025 | 39.10% (0.39099) | 97.10th | v4 (v2025.03.14) |
| Nov 18, 2025 | 50.82% (0.50823) | 97.73th | v4 (v2025.03.14) |
| Oct 28, 2025 | 39.10% (0.39099) | 97.09th | v4 (v2025.03.14) |
| Oct 27, 2025 | 40.83% (0.40828) | 97.21th | v4 (v2025.03.14) |
| Oct 1, 2025 | 39.10% (0.39099) | 97.18th | v4 (v2025.03.14) |
| Sep 18, 2025 | 40.83% (0.40828) | 97.29th | v4 (v2025.03.14) |
| Mar 30, 2025 | 42.07% (0.42072) | 97.16th | v4 (v2025.03.14) |
| Mar 29, 2025 | 40.64% (0.40638) | 96.04th | v4 (v2025.03.14) |
| Mar 28, 2025 | 42.07% (0.42072) | 97.16th | v4 (v2025.03.14) |
| Mar 27, 2025 | 40.64% (0.40638) | 96.89th | v4 (v2025.03.14) |
| Mar 20, 2025 | 42.07% (0.42072) | 97.19th | v4 (v2025.03.14) |
| Mar 19, 2025 | 40.64% (0.40638) | 96.95th | v4 (v2025.03.14) |
| Mar 17, 2025 | 42.07% (0.42072) | 97.13th | v4 (v2025.03.14) |
| Dec 17, 2024 | 0.80% (0.00802) | 81.47th | v3 (v2023.03.01) |
| Sep 27, 2024 | 4.77% (0.04767) | 92.84th | v3 (v2023.03.01) |
| Aug 27, 2024 | 3.31% (0.03306) | 91.48th | v3 (v2023.03.01) |
| Jun 6, 2024 | 4.35% (0.04354) | 92.35th | v3 (v2023.03.01) |
| Apr 19, 2024 | 5.12% (0.05119) | 92.85th | v3 (v2023.03.01) |
| Mar 10, 2024 | 6.24% (0.06244) | 93.41th | v3 (v2023.03.01) |
| Jan 27, 2024 | 4.65% (0.04650) | 91.79th | v3 (v2023.03.01) |
| Oct 12, 2023 | 6.44% (0.06439) | 92.87th | v3 (v2023.03.01) |
| Jul 8, 2023 | 4.65% (0.04650) | 91.44th | v3 (v2023.03.01) |
| Mar 7, 2023 | 5.38% (0.05375) | 91.89th | v3 (v2023.03.01) |
| Mar 6, 2023 | 61.89% (0.61890) | 98.95th | v2 (v2022.01.01) |
| Feb 4, 2022 | 61.89% (0.61890) | 98.69th | v2 (v2022.01.01) |
| Feb 3, 2022 | 17.37% (0.17372) | 90.59th | v1 |
| Jan 6, 2022 | 17.37% (0.17372) | 90.48th | v1 |
| Sep 1, 2021 | 17.37% (0.17372) | 97.45th | v1 |
| Apr 14, 2021 | 17.37% (0.17372) | 0.00th | v1 |
References (14)
- http://www.securityfocus.com/bid/105460 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041770 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:2881 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2884 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-12386 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1493900 x_refsource_CONFIRMExploitIssue TrackingPatchVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1635451 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-12386
- https://security.gentoo.org/glsa/201810-01 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://usn.ubuntu.com/3778-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-12386
- https://www.debian.org/security/2018/dsa-4310 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.mozilla.org/en-US/security/advisories/mfsa2018-24/#CVE-2018-12386
- https://www.mozilla.org/security/advisories/mfsa2018-24/ x_refsource_CONFIRMVendor Advisory
Change history (0)
No recorded changes yet.