kernel: Remotely triggerable recursion in GRE code leading to kernel crash
Published Oct 16, 2016
7.5
HIGHCVSS 3.1
EPSS 4.70%
Description
The IP stack in the Linux kernel before 4.6 allows remote attackers to cause a denial of service (stack consumption and panic) or possibly have unspecified other impact by triggering use of the GRO path for packets with tunnel stacking, as demonstrated by interleaved IPv4 headers and GRE headers, a related issue to CVE-2016-7039.
Affected products
No data.
- ≥ 3.14 · < 3.16.35
- ≥ 3.17 · < 3.18.47
- ≥ 3.19 · < 4.1.38
- ≥ 4.2 · < 4.4.29
- ≥ 4.5 · < 4.6
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-327.36.2.el7
Fixed · RHSA-2016:2047
Red Hat Enterprise Linux 7
kernel-aarch64-0:4.5.0-15.2.1.el7
Fixed · RHSA-2017:0372
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-327.36.3.rt56.238.el7
Fixed · RHSA-2016:2110
Red Hat Enterprise Linux 7.1 Extended Update Support
kernel-0:3.10.0-229.46.1.ael7b
Fixed · RHSA-2017:0004
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-327.rt56.198.el6rt
Fixed · RHSA-2016:2107
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-327.36.2.el7 | Fixed | RHSA-2016:2047 |
| Red Hat Enterprise Linux 7 | kernel-aarch64-0:4.5.0-15.2.1.el7 | Fixed | RHSA-2017:0372 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-327.36.3.rt56.238.el7 | Fixed | RHSA-2016:2110 |
| Red Hat Enterprise Linux 7.1 Extended Update Support | kernel-0:3.10.0-229.46.1.ael7b | Fixed | RHSA-2017:0004 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-327.rt56.198.el6rt | Fixed | RHSA-2016:2107 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:C
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 (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.70% (0.04700) | 91.52th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.74% (0.04739) | 90.67th | v5 (v2026.06.15) |
| Jun 14, 2026 | 2.60% (0.02604) | 86.00th | v4 (v2025.03.14) |
| Mar 18, 2026 | 4.69% (0.04691) | 89.23th | v4 (v2025.03.14) |
| Mar 30, 2025 | 3.52% (0.03520) | 86.52th | v4 (v2025.03.14) |
| Mar 29, 2025 | 5.14% (0.05136) | 82.71th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.52% (0.03520) | 86.85th | v4 (v2025.03.14) |
| Dec 12, 2024 | 8.75% (0.08754) | 94.80th | v3 (v2023.03.01) |
| Jan 17, 2024 | 8.75% (0.08754) | 93.94th | v3 (v2023.03.01) |
| Nov 8, 2023 | 7.83% (0.07834) | 93.52th | v3 (v2023.03.01) |
| Oct 29, 2023 | 6.30% (0.06297) | 92.82th | v3 (v2023.03.01) |
| Sep 19, 2023 | 7.47% (0.07471) | 93.33th | v3 (v2023.03.01) |
| Aug 7, 2023 | 7.05% (0.07053) | 93.07th | v3 (v2023.03.01) |
| May 8, 2023 | 5.98% (0.05982) | 92.31th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.71% (0.04713) | 91.37th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
References (15)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fac8e0f579695a3ecbc4d3cac369139d7f819971 x_refsource_CONFIRM
- http://rhn.redhat.com/errata/RHSA-2016-2047.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2016-2107.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2016-2110.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2017-0004.html vendor-advisoryx_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2016/10/13/11 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/93562 vdb-entryx_refsource_BID
- https://access.redhat.com/errata/RHSA-2017:0372 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2016-8666 Vendor Advisory
- https://bto.bluecoat.com/security-advisory/sa134 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=1384991 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.suse.com/show_bug.cgi?id=1001486 x_refsource_CONFIRM
- https://github.com/torvalds/linux/commit/fac8e0f579695a3ecbc4d3cac369139d7f819971 x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2016-8666
- https://www.cve.org/CVERecord?id=CVE-2016-8666
Change history (0)
No recorded changes yet.