kernel: Improper sorting of GIDs in nfsd can lead to incorrect permissions being applied
Published Feb 9, 2018
7.4
HIGHCVSS 3.1
EPSS 1.38%
Description
Linux kernel version after commit bdcf0a423ea1 - 4.15-rc4+, 4.14.8+, 4.9.76+, 4.4.111+ contains a Incorrect Access Control vulnerability in NFS server (nfsd) that can result in remote users reading or writing files they should not be able to via NFS. This attack appear to be exploitable via NFS server must export a filesystem with the "rootsquash" options enabled. This vulnerability appears to have been fixed in after commit 1995266727fa.
Affected products
No data.
- ≥ 4.4.111 · ≤ 4.4.119
- ≥ 4.9.76 · ≤ 4.9.85
- ≥ 4.14.8 · ≤ 4.14.23
- ≥ 4.15.1 · ≤ 4.15.7
- 4.15
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 Linux 8
kernel-rt
Not affected
Red Hat Enterprise MRG 2
kernel-rt
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 Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | 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:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
AV:N/AC:M/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 4, 2026.
Score over time
2021-2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 4, 2026 | 1.38% (0.01384) | 71.25th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.38% (0.01384) | 70.97th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.24% (0.00242) | 64.70th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.24% (0.00242) | 63.33th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.24% (0.00242) | 60.35th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.52% (0.00523) | 12.55th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.52% (0.00523) | 0.00th | v1 |
References (5)
- https://access.redhat.com/security/cve/CVE-2018-1000028 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1540439 Issue Tracking
- https://git.kernel.org/linus/1995266727fa8143897e89b55f5d3c79aa828420 x_refsource_CONFIRMPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-1000028
- https://www.cve.org/CVERecord?id=CVE-2018-1000028
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2018-1000028 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1540439 | Issue Tracking | |
| https://git.kernel.org/linus/1995266727fa8143897e89b55f5d3c79aa828420 | x_refsource_CONFIRMPatchVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-1000028 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-1000028 |
Change history (0)
No recorded changes yet.