Mozilla: Memory safety bugs fixed in Firefox 49 (MFSA 2016-85)
Published Sep 22, 2016
9.8
CRITICALCVSS 3.0
EPSS 3.84%
Description
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 49.0 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
firefox
Not affected
Red Hat Enterprise Linux 5
thunderbird
Not affected
Red Hat Enterprise Linux 6
firefox
Not affected
Red Hat Enterprise Linux 6
thunderbird
Not affected
Red Hat Enterprise Linux 7
firefox
Not affected
Red Hat Enterprise Linux 7
thunderbird
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 5 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 6 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 6 | thunderbird | Not affected | n/a |
| Red Hat Enterprise Linux 7 | firefox | 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: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 (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.84% (0.03840) | 89.79th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.77% (0.03767) | 88.48th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.76% (0.00755) | 70.93th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.17% (0.03173) | 78.12th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.81% (0.00809) | 72.53th | v4 (v2025.03.14) |
| Jan 26, 2025 | 3.69% (0.03694) | 91.70th | v3 (v2023.03.01) |
| Dec 17, 2024 | 4.72% (0.04722) | 92.55th | v3 (v2023.03.01) |
| Dec 12, 2024 | 3.61% (0.03613) | 92.02th | v3 (v2023.03.01) |
| Dec 24, 2023 | 3.53% (0.03533) | 90.64th | v3 (v2023.03.01) |
| Nov 15, 2023 | 3.09% (0.03087) | 89.96th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.73% (0.02732) | 88.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.70% (0.06698) | 91.56th | v2 (v2022.01.01) |
| Apr 1, 2022 | 6.70% (0.06698) | 90.75th | v2 (v2022.01.01) |
| Feb 4, 2022 | 6.70% (0.06698) | 78.74th | v2 (v2022.01.01) |
References (16)
- http://www.mozilla.org/security/announce/2016/mfsa2016-85.html x_refsource_CONFIRMVendor Advisory
- http://www.securityfocus.com/bid/93052 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1036852 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2016-5256 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1268034 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.mozilla.org/show_bug.cgi?id=1276413 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.mozilla.org/show_bug.cgi?id=1282746 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.mozilla.org/show_bug.cgi?id=1290244 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.mozilla.org/show_bug.cgi?id=1296078 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.mozilla.org/show_bug.cgi?id=1296087 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.mozilla.org/show_bug.cgi?id=1297099 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=1377666 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-5256
- https://security.gentoo.org/glsa/201701-15 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2016-5256
- https://www.mozilla.org/security/announce/2016/mfsa2016-85.html
Change history (0)
No recorded changes yet.