kernel: netfilter: use-after-free in tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c
Published Jan 3, 2018
9.8
CRITICALCVSS 3.1
EPSS 52.84%
Description
The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action.
Affected products
No data.
Configuration 1
- ≥ 3.2 · < 3.2.99
- ≥ 3.3 · < 3.10.108
- ≥ 3.11 · < 3.16.54
- ≥ 3.17 · < 3.18.60
- ≥ 3.19 · < 4.1.43
- ≥ 4.2 · < 4.4.76
- ≥ 4.5 · < 4.9.36
- ≥ 4.10 · < 4.11
Configuration 2
- 7.0
- 8.0
Configuration 5
- n/a
- 11
- 11
- 12
- 11
- 6
- 42.3
- 12
- 12
- 12
- 12
- 11
- 12
- 12
- 11
- 12
- 12
- 11
- 11
- 12
- 12
- 12
- 12
- 12
- 12
- 11
- 12
- 12
- 12
- 12
Configuration 6
- 7
Configuration 7
- 12.04
- 14.04
Configuration 8
- 2.0
- 6.0
- 7.0
- 7.3
- 7.4
- 7.6
- 7.7
- 7
- 7
- 6.0
- 7.0
- 7.3
- 7.4
- 7.6
- 7.7
- 7.3
- 7.4
- 7.6
- 7.7
- 6.0
- 7.0
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-696.28.1.el6
Fixed · RHSA-2018:1319
Red Hat Enterprise Linux 7
kernel-0:3.10.0-862.el7
Fixed · RHSA-2018:1062
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-862.rt56.804.el7
Fixed · RHSA-2018:0676
Red Hat Enterprise Linux 7.3 Extended Update Support
kernel-0:3.10.0-514.51.1.el7
Fixed · RHSA-2018:1737
Red Hat Enterprise Linux 7.4 Extended Update Support
kernel-0:3.10.0-693.25.2.el7
Fixed · RHSA-2018:1130
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-693.25.2.rt56.612.el6rt
Fixed · RHSA-2018:1170
Red Hat Enterprise Linux 5
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel-alt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-696.28.1.el6 | Fixed | RHSA-2018:1319 |
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-862.el7 | Fixed | RHSA-2018:1062 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-862.rt56.804.el7 | Fixed | RHSA-2018:0676 |
| Red Hat Enterprise Linux 7.3 Extended Update Support | kernel-0:3.10.0-514.51.1.el7 | Fixed | RHSA-2018:1737 |
| Red Hat Enterprise Linux 7.4 Extended Update Support | kernel-0:3.10.0-693.25.2.el7 | Fixed | RHSA-2018:1130 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-693.25.2.rt56.612.el6rt | Fixed | RHSA-2018:1170 |
| Red Hat Enterprise Linux 5 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. This is not currently planned to be addressed in future updates of the product due to its life cycle. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/. This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7, its real-time kernel, Red Hat Enterprise MRG 2, Red Hat Enterprise Linux 7 for ARM 64 and Red Hat Enterprise Linux 7 for Power 9 LE. Future Linux kernel updates for the respective releases may address this issue.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
AV:N/AC:L/Au:N/C:C/I:C/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 (38 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 52.84% (0.52841) | 98.94th | v5 (v2026.06.15) |
| Jun 15, 2026 | 52.19% (0.52189) | 98.81th | v5 (v2026.06.15) |
| Mar 26, 2026 | 34.31% (0.34310) | 96.95th | v4 (v2025.03.14) |
| Mar 17, 2026 | 40.71% (0.40707) | 97.32th | v4 (v2025.03.14) |
| Mar 2, 2026 | 37.76% (0.37760) | 97.14th | v4 (v2025.03.14) |
| Feb 24, 2026 | 40.37% (0.40366) | 97.26th | v4 (v2025.03.14) |
| Feb 18, 2026 | 46.92% (0.46924) | 97.59th | v4 (v2025.03.14) |
| Feb 11, 2026 | 48.31% (0.48308) | 97.65th | v4 (v2025.03.14) |
| Dec 28, 2025 | 33.58% (0.33581) | 96.78th | v4 (v2025.03.14) |
| Dec 27, 2025 | 44.62% (0.44619) | 97.46th | v4 (v2025.03.14) |
| Nov 1, 2025 | 33.58% (0.33581) | 96.75th | v4 (v2025.03.14) |
| Oct 28, 2025 | 27.65% (0.27651) | 96.20th | v4 (v2025.03.14) |
| Oct 27, 2025 | 38.09% (0.38093) | 97.05th | v4 (v2025.03.14) |
| Oct 1, 2025 | 27.65% (0.27651) | 96.29th | v4 (v2025.03.14) |
| Jul 20, 2025 | 38.09% (0.38093) | 97.05th | v4 (v2025.03.14) |
| Jun 28, 2025 | 39.20% (0.39203) | 97.11th | v4 (v2025.03.14) |
| Jun 21, 2025 | 40.25% (0.40253) | 97.17th | v4 (v2025.03.14) |
| Mar 30, 2025 | 37.59% (0.37592) | 96.88th | v4 (v2025.03.14) |
| Mar 29, 2025 | 15.84% (0.15836) | 91.27th | v4 (v2025.03.14) |
| Mar 17, 2025 | 37.59% (0.37592) | 96.84th | v4 (v2025.03.14) |
| Feb 25, 2025 | 88.23% (0.88226) | 98.98th | v3 (v2023.03.01) |
| Dec 17, 2024 | 91.09% (0.91090) | 99.12th | v3 (v2023.03.01) |
| Apr 8, 2024 | 95.38% (0.95385) | 99.32th | v3 (v2023.03.01) |
| Jul 30, 2023 | 96.14% (0.96139) | 99.27th | v3 (v2023.03.01) |
| Jul 6, 2023 | 96.34% (0.96344) | 99.32th | v3 (v2023.03.01) |
| May 27, 2023 | 96.39% (0.96392) | 99.30th | v3 (v2023.03.01) |
| May 8, 2023 | 96.66% (0.96663) | 99.41th | v3 (v2023.03.01) |
| May 5, 2023 | 96.27% (0.96272) | 99.23th | v3 (v2023.03.01) |
| Mar 7, 2023 | 96.51% (0.96512) | 99.27th | v3 (v2023.03.01) |
| Mar 6, 2023 | 7.55% (0.07550) | 92.83th | v2 (v2022.01.01) |
| Apr 23, 2022 | 7.55% (0.07550) | 92.17th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.36% (0.04358) | 86.83th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.36% (0.04358) | 70.59th | v2 (v2022.01.01) |
| Feb 3, 2022 | 8.26% (0.08261) | 85.31th | v1 |
| Jan 6, 2022 | 8.26% (0.08261) | 85.14th | v1 |
| Nov 9, 2021 | 8.26% (0.08261) | 92.97th | v1 |
| Sep 1, 2021 | 4.91% (0.04910) | 87.49th | v1 |
| Apr 14, 2021 | 4.91% (0.04910) | 0.00th | v1 |
References (37)
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Change history (0)
No recorded changes yet.