kernel: infinite loop in net/ipv4/cipso_ipv4.c:cipso_v4_optptr() allows for DoS
Published Aug 27, 2018
5.9
MEDIUMCVSS 3.0
EPSS 5.00%
Description
A flaw was found in the Linux kernel present since v4.0-rc1 and through v4.13-rc4. A crafted network packet sent remotely by an attacker may force the kernel to enter an infinite loop in the cipso_v4_optptr() function in net/ipv4/cipso_ipv4.c leading to a denial-of-service. A certain non-default configuration of LSM (Linux Security Module) and NetLabel should be set up on a system before an attacker could leverage this flaw.
Affected products
No data.
Configuration 1
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.0
- 4.1
- 4.1
- 4.1
- 4.1
- 4.1
- 4.1
- 4.1
- 4.1
- 4.1
- 4.2
- 4.2
- 4.2
- 4.2
- 4.2
- 4.2
- 4.2
- 4.2
- 4.2
- 4.3
- 4.3
- 4.3
- 4.3
- 4.3
- 4.3
- 4.3
- 4.3
- 4.4
- 4.4
- 4.4
- 4.4
- 4.4
- 4.4
- 4.4
- 4.4
- 4.4
- 4.5
- 4.5
- 4.5
- 4.5
- 4.5
- 4.5
- 4.5
- 4.5
- 4.6
- 4.6
- 4.6
- 4.6
- 4.6
- 4.6
- 4.6
- 4.6
- 4.7
- 4.7
- 4.7
- 4.7
- 4.7
- 4.7
- 4.7
- 4.7
- 4.8
- 4.8
- 4.8
- 4.8
- 4.8
- 4.8
- 4.8
- 4.8
- 4.8
- 4.9
- 4.9
- 4.9
- 4.9
- 4.9
- 4.9
- 4.9
- 4.9
- 4.9
- 4.10
- 4.10
- 4.10
- 4.10
- 4.10
- 4.10
- 4.10
- 4.10
- 4.10
- 4.11
- 4.11
- 4.11
- 4.11
- 4.11
- 4.11
- 4.11
- 4.11
- 4.11
- 4.12
- 4.12
- 4.12
- 4.12
- 4.12
- 4.12
- 4.12
- 4.12
- 4.13
- 4.13
- 4.13
- 4.13
Configuration 2
- 14.04
- 16.04
- 9.0
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-alt
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-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.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
AV:N/AC:M/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 (26 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.00% (0.04997) | 91.96th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.00% (0.04997) | 91.09th | v5 (v2026.06.15) |
| Dec 28, 2025 | 4.37% (0.04369) | 88.59th | v4 (v2025.03.14) |
| Dec 27, 2025 | 5.78% (0.05775) | 90.23th | v4 (v2025.03.14) |
| Oct 28, 2025 | 4.37% (0.04369) | 88.43th | v4 (v2025.03.14) |
| Oct 27, 2025 | 5.78% (0.05775) | 90.10th | v4 (v2025.03.14) |
| Oct 1, 2025 | 4.37% (0.04369) | 88.54th | v4 (v2025.03.14) |
| Mar 30, 2025 | 6.09% (0.06095) | 89.83th | v4 (v2025.03.14) |
| Mar 29, 2025 | 8.12% (0.08115) | 86.67th | v4 (v2025.03.14) |
| Mar 19, 2025 | 6.09% (0.06095) | 89.57th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.72% (0.04718) | 88.66th | v4 (v2025.03.14) |
| Jul 20, 2024 | 2.23% (0.02228) | 89.65th | v3 (v2023.03.01) |
| Apr 15, 2024 | 2.23% (0.02228) | 89.33th | v3 (v2023.03.01) |
| Mar 22, 2024 | 2.97% (0.02968) | 90.64th | v3 (v2023.03.01) |
| Feb 27, 2024 | 4.15% (0.04145) | 91.92th | v3 (v2023.03.01) |
| Jan 18, 2024 | 4.83% (0.04834) | 91.97th | v3 (v2023.03.01) |
| Aug 21, 2023 | 6.28% (0.06276) | 92.68th | v3 (v2023.03.01) |
| Mar 7, 2023 | 7.40% (0.07403) | 93.01th | 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) |
| Feb 3, 2022 | 2.07% (0.02069) | 50.36th | v1 |
| Jan 6, 2022 | 2.07% (0.02069) | 49.86th | v1 |
| Sep 1, 2021 | 2.07% (0.02069) | 77.27th | v1 |
| Apr 14, 2021 | 2.07% (0.02069) | 0.00th | v1 |
References (13)
- http://seclists.org/oss-sec/2018/q3/179 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/105154 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041569 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-10938 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1622404 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10938 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=40413955ee265a5e42f710940ec78f5450d49149 x_refsource_CONFIRMMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-10938
- https://usn.ubuntu.com/3797-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3797-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-10938
- https://www.debian.org/security/2018/dsa-4308 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.