Mozilla: Crash when using shared memory in JavaScript (MFSA 2015-87)
Published Aug 16, 2015
5.0
MEDIUMCVSS 2.0
EPSS 4.27%
Description
The js::jit::AssemblerX86Shared::lock_addl function in the JavaScript implementation in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 allows remote attackers to cause a denial of service (application crash) by leveraging the use of shared memory and accessing (1) an Atomics object or (2) a SharedArrayBuffer object.
Affected products
No data.
Configuration 1
- 12.04
- 14.04
- 15.04
- 13.1
- 13.2
Configuration 2
No data.
Red Hat Enterprise Linux 5
firefox-0:38.2.0-4.el5_11
Fixed · RHSA-2015:1586
Red Hat Enterprise Linux 6
firefox-0:38.2.0-4.el6_7
Fixed · RHSA-2015:1586
Red Hat Enterprise Linux 7
firefox-0:38.2.0-4.ael7b_1
Fixed · RHSA-2015:1586
Red Hat Enterprise Linux 5
thunderbird
Not affected
Red Hat Enterprise Linux 6
thunderbird
Not affected
Red Hat Enterprise Linux 7
thunderbird
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | firefox-0:38.2.0-4.el5_11 | Fixed | RHSA-2015:1586 |
| Red Hat Enterprise Linux 6 | firefox-0:38.2.0-4.el6_7 | Fixed | RHSA-2015:1586 |
| Red Hat Enterprise Linux 7 | firefox-0:38.2.0-4.ael7b_1 | Fixed | RHSA-2015:1586 |
| Red Hat Enterprise Linux 5 | thunderbird | Not affected | n/a |
| 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.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/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 | 4.27% (0.04269) | 90.78th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.27% (0.04269) | 89.77th | v5 (v2026.06.15) |
| Oct 17, 2025 | 0.85% (0.00848) | 74.10th | v4 (v2025.03.14) |
| Jun 10, 2025 | 2.08% (0.02084) | 83.14th | v4 (v2025.03.14) |
| Mar 30, 2025 | 0.93% (0.00931) | 74.02th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.47% (0.04474) | 81.45th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.93% (0.00931) | 74.52th | v4 (v2025.03.14) |
| Dec 17, 2024 | 8.14% (0.08143) | 94.32th | v3 (v2023.03.01) |
| Jun 7, 2023 | 4.86% (0.04859) | 91.56th | v3 (v2023.03.01) |
| Apr 2, 2023 | 4.24% (0.04236) | 90.95th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.97% (0.03973) | 90.66th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.78% (0.03779) | 85.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.78% (0.03779) | 84.01th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.78% (0.03779) | 67.21th | v2 (v2022.01.01) |
References (22)
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00021.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00016.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00025.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2015-08/msg00030.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2015-08/msg00031.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2015-1586.html vendor-advisoryx_refsource_REDHAT
- http://www.debian.org/security/2015/dsa-3333 vendor-advisoryx_refsource_DEBIAN
- http://www.mozilla.org/security/announce/2015/mfsa2015-87.html x_refsource_CONFIRMVendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html x_refsource_CONFIRMThird Party Advisory
- http://www.securitytracker.com/id/1033247 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/USN-2702-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2702-2 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2702-3 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2015-4484 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1171540 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=1252289 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-4484
- https://security.gentoo.org/glsa/201605-06 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2015-4484
- https://www.mozilla.org/security/announce/2015/mfsa2015-87.html
Change history (0)
No recorded changes yet.