kernel: ping socket / AF_LLC connect() sin_family race
Published Apr 5, 2017
7.8
HIGHCVSS 3.0
EPSS 1.46%
Description
The ping_unhash function in net/ipv4/ping.c in the Linux kernel through 4.10.8 is too late in obtaining a certain lock and consequently cannot ensure that disconnect function calls are safe, which allows local users to cause a denial of service (panic) by leveraging access to the protocol value of IPPROTO_ICMP in a socket system call.
Affected products
No data.
- ≤ 4.10.8
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-754.el6
Fixed · RHSA-2018:1854
Red Hat Enterprise Linux 7
kernel-0:3.10.0-693.el7
Fixed · RHSA-2017:1842
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-693.rt56.617.el7
Fixed · RHSA-2017:2077
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-693.2.1.rt56.585.el6rt
Fixed · RHSA-2017:2669
Red Hat Enterprise Linux 5
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-754.el6 | Fixed | RHSA-2018:1854 |
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-693.el7 | Fixed | RHSA-2017:1842 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-693.rt56.617.el7 | Fixed | RHSA-2017:2077 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-693.2.1.rt56.585.el6rt | Fixed | RHSA-2017:2669 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 as the code with the flaw is not present in the products listed. This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7 and MRG-2. Future Linux kernel updates for the respective releases may address this issue.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AV:L/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
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 (19 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.46% (0.01463) | 72.67th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.46% (0.01463) | 70.12th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.44% (0.00440) | 60.24th | v4 (v2025.03.14) |
| Mar 29, 2025 | 1.85% (0.01849) | 71.91th | v4 (v2025.03.14) |
| Mar 28, 2025 | 0.44% (0.00440) | 60.29th | v4 (v2025.03.14) |
| Mar 27, 2025 | 1.85% (0.01849) | 80.88th | v4 (v2025.03.14) |
| Mar 20, 2025 | 0.55% (0.00548) | 65.39th | v4 (v2025.03.14) |
| Mar 19, 2025 | 1.85% (0.01849) | 81.08th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.55% (0.00548) | 65.91th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00045) | 17.92th | v3 (v2023.03.01) |
| May 1, 2024 | 0.04% (0.00045) | 14.51th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00045) | 12.47th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.82% (0.03821) | 85.56th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.82% (0.03821) | 84.08th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.82% (0.03821) | 67.27th | v2 (v2022.01.01) |
| Feb 3, 2022 | 7.55% (0.07554) | 83.93th | v1 |
| Jan 6, 2022 | 7.55% (0.07554) | 83.78th | v1 |
| Sep 1, 2021 | 7.55% (0.07554) | 91.42th | v1 |
| Apr 14, 2021 | 7.55% (0.07554) | 0.00th | v1 |
References (16)
- http://openwall.com/lists/oss-security/2017/04/04/8 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/97407 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:1842 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2017:2077 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2017:2669 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2018:1854 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2017-2671 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1436649 Issue Tracking
- https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/net/ipv4/ping.c?id=43a6684519ab0a6c52024b5e25322476cabad893 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://github.com/danieljiang0415/android_kernel_crash_poc x_refsource_MISCThird Party Advisory
- https://github.com/torvalds/linux/commit/43a6684519ab0a6c52024b5e25322476cabad893 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-2671
- https://twitter.com/danieljiang0415/status/845116665184497664 x_refsource_MISCThird Party Advisory
- https://usn.ubuntu.com/3754-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2017-2671
- https://www.exploit-db.com/exploits/42135/ exploitx_refsource_EXPLOIT-DB
Change history (0)
No recorded changes yet.