Mozilla: Memory safety bugs fixed in Firefox 50.1 and Firefox ESR 45.6 (MFSA 2016-95)
Published Jun 11, 2018
9.8
CRITICALCVSS 3.0
EPSS 2.53%
Description
Memory safety bugs were reported in Thunderbird 45.5. 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 Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<50.1
- Version
-
- Version unspecifiedStatusaffectedConstraints<45.6
- Version
-
- Version unspecifiedStatusaffectedConstraints<45.6
- 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
- 9.0
Configuration 2
- 5.0
- 6.0
- 7.0
- 5.0
- 6.0
- 7.0
- 5.0
- 6.0
- 7.0
- 7.3
- 7.4
- 7.3
- 7.4
- 7.5
- 5.0
- 6.0
- 7.0
Configuration 3
- < 45.6.0
No data.
Red Hat Enterprise Linux 5
firefox-0:45.6.0-1.el5_11
Fixed · RHSA-2016:2946
Red Hat Enterprise Linux 5
thunderbird-0:45.6.0-1.el5_11
Fixed · RHSA-2016:2973
Red Hat Enterprise Linux 6
firefox-0:45.6.0-1.el6_8
Fixed · RHSA-2016:2946
Red Hat Enterprise Linux 6
thunderbird-0:45.6.0-1.el6_8
Fixed · RHSA-2016:2973
Red Hat Enterprise Linux 7
firefox-0:45.6.0-1.el7_3
Fixed · RHSA-2016:2946
Red Hat Enterprise Linux 7
thunderbird-0:45.6.0-1.el7_3
Fixed · RHSA-2016:2973
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | firefox-0:45.6.0-1.el5_11 | Fixed | RHSA-2016:2946 |
| Red Hat Enterprise Linux 5 | thunderbird-0:45.6.0-1.el5_11 | Fixed | RHSA-2016:2973 |
| Red Hat Enterprise Linux 6 | firefox-0:45.6.0-1.el6_8 | Fixed | RHSA-2016:2946 |
| Red Hat Enterprise Linux 6 | thunderbird-0:45.6.0-1.el6_8 | Fixed | RHSA-2016:2973 |
| Red Hat Enterprise Linux 7 | firefox-0:45.6.0-1.el7_3 | Fixed | RHSA-2016:2946 |
| Red Hat Enterprise Linux 7 | thunderbird-0:45.6.0-1.el7_3 | Fixed | RHSA-2016:2973 |
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:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
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
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.53% (0.02534) | 84.37th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.57% (0.02567) | 83.05th | v5 (v2026.06.15) |
| Dec 26, 2025 | 2.68% (0.02683) | 85.41th | v4 (v2025.03.14) |
| Mar 30, 2025 | 3.69% (0.03688) | 86.83th | v4 (v2025.03.14) |
| Mar 29, 2025 | 6.94% (0.06938) | 85.36th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.15% (0.03149) | 86.03th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.63% (0.00626) | 79.67th | v3 (v2023.03.01) |
| Apr 19, 2024 | 0.62% (0.00618) | 78.57th | v3 (v2023.03.01) |
| Jan 29, 2024 | 0.62% (0.00618) | 76.57th | v3 (v2023.03.01) |
| Dec 12, 2023 | 0.44% (0.00436) | 71.83th | v3 (v2023.03.01) |
| Nov 2, 2023 | 0.47% (0.00471) | 72.94th | v3 (v2023.03.01) |
| Jun 5, 2023 | 0.43% (0.00429) | 70.76th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.47% (0.00467) | 71.68th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
References (15)
- http://rhn.redhat.com/errata/RHSA-2016-2946.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2973.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.securityfocus.com/bid/94885 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037461 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2016-9893 Vendor Advisory
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1319524%2C1298773%2C1299098%2C1309834%2C1312609%2C1313212%2C1317805%2C1312548%2C1315631%2C1287912 x_refsource_CONFIRMIssue TrackingVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1404096 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-9893
- https://security.gentoo.org/glsa/201701-15 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-9893
- https://www.debian.org/security/2017/dsa-3757 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-94/ x_refsource_CONFIRMVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-95/ x_refsource_CONFIRMVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-96/ x_refsource_CONFIRMVendor Advisory
- https://www.mozilla.org/security/announce/2016/mfsa2016-95/#CVE-2016-9893
Change history (0)
No recorded changes yet.