kernel: SELinux netlink permission check bypass
Published May 26, 2020
6.1
MEDIUMCVSS 3.1
EPSS 0.35%
Description
A flaw was found in the Linux kernels SELinux LSM hook implementation before version 5.7, where it incorrectly assumed that an skb would only contain a single netlink message. The hook would incorrectly only validate the first netlink message in the skb and allow or deny the rest of the messages within the skb with the granted permission without further processing.
Affected products
-
- Version before 5.7StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| The Linux Foundation | Kernel | n/a |
|
Configuration 2
- 7.0
- 8.0
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-1160.el7
Fixed · RHSA-2020:4060
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-1160.rt56.1131.el7
Fixed · RHSA-2020:4062
Red Hat Enterprise Linux 8
kernel-0:4.18.0-240.el8
Fixed · RHSA-2020:4431
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-240.rt7.54.el8
Fixed · RHSA-2020:4609
Red Hat Enterprise Linux 5
kernel
Out of support scope
Red Hat Enterprise Linux 6
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel-alt
Will not fix
Red Hat Enterprise MRG 2
kernel-rt
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-1160.el7 | Fixed | RHSA-2020:4060 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-1160.rt56.1131.el7 | Fixed | RHSA-2020:4062 |
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-240.el8 | Fixed | RHSA-2020:4431 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-240.rt7.54.el8 | Fixed | RHSA-2020:4609 |
| Red Hat Enterprise Linux 5 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Will not fix | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:P/I:P/A:N
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 (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.35% (0.00348) | 25.95th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.35% (0.00348) | 26.40th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.42% (0.00424) | 59.30th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.64% (0.04640) | 81.78th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.10% (0.00098) | 25.11th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.05% (0.00050) | 21.44th | v3 (v2023.03.01) |
| Jun 7, 2024 | 0.05% (0.00050) | 19.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.05% (0.00050) | 17.22th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.84% (0.05839) | 77.39th | v2 (v2022.01.01) |
| Feb 3, 2022 | 15.32% (0.15322) | 90.03th | v1 |
| Jan 6, 2022 | 15.32% (0.15322) | 89.91th | v1 |
| Sep 1, 2021 | 3.88% (0.03876) | 83.07th | v1 |
| Jun 15, 2021 | 3.88% (0.03876) | 0.00th | v1 |
| Apr 14, 2021 | 3.68% (0.03679) | 0.00th | v1 |
References (23)
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html vendor-advisoryx_refsource_SUSE
- http://www.openwall.com/lists/oss-security/2020/05/27/3 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2020-10751 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1839634 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10751 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fb73974172ffaaf57a7c42f35424d9aece1a5af6 x_refsource_CONFIRMPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html mailing-listx_refsource_MLIST
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html mailing-listx_refsource_MLIST
- https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html mailing-listx_refsource_MLIST
- https://lore.kernel.org/selinux/CACT4Y+b8HiV6KFuAPysZD=5hmyO4QisgxCKi4DHU3CfMPSP=yg%40mail.gmail.com/ x_refsource_CONFIRM
- https://lore.kernel.org/selinux/CACT4Y+b8HiV6KFuAPysZD=5hmyO4QisgxCKi4DHU3CfMPSP=yg@mail.gmail.com/
- https://nvd.nist.gov/vuln/detail/CVE-2020-10751
- https://usn.ubuntu.com/4389-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4390-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4391-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4412-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4413-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2020-10751
- https://www.debian.org/security/2020/dsa-4698 vendor-advisoryx_refsource_DEBIAN
- https://www.debian.org/security/2020/dsa-4699 vendor-advisoryx_refsource_DEBIAN
- https://www.openwall.com/lists/oss-security/2020/04/30/5 x_refsource_CONFIRMMailing ListThird Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.html x_refsource_MISC
Change history (0)
No recorded changes yet.