kernel: NULL pointer dereference in lookup_slow function
Published Jul 3, 2018
5.5
MEDIUMCVSS 3.0
EPSS 1.73%
Description
An issue was discovered in fs/xfs/xfs_icache.c in the Linux kernel through 4.17.3. There is a NULL pointer dereference and panic in lookup_slow() on a NULL inode->i_ops pointer when doing pathwalks on a corrupted xfs image. This occurs because of a lack of proper validation that cached inodes are free during allocation.
Affected products
No data.
- ≤ 4.17.3
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-1062.el7
Fixed · RHSA-2019:2029
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-1062.rt56.1022.el7
Fixed · RHSA-2019:2043
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-alt
Fix deferred
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-1062.el7 | Fixed | RHSA-2019:2029 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-1062.rt56.1022.el7 | Fixed | RHSA-2019:2043 |
| 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-alt | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Fix deferred | 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:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
AV:N/AC:M/Au:N/C:N/I:N/A:P
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 v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.73% (0.01725) | 76.70th | v5 (v2026.06.15) |
| Sep 22, 2026 | 1.73% (0.01725) | 76.53th | v5 (v2026.06.15) |
| Sep 21, 2026 | 2.96% (0.02958) | 86.54th | v5 (v2026.06.15) |
| Sep 6, 2026 | 1.73% (0.01725) | 76.02th | v5 (v2026.06.15) |
| Sep 5, 2026 | 2.96% (0.02958) | 86.24th | v5 (v2026.06.15) |
| Aug 30, 2026 | 1.73% (0.01725) | 75.90th | v5 (v2026.06.15) |
| Aug 28, 2026 | 2.96% (0.02958) | 86.16th | v5 (v2026.06.15) |
| Aug 24, 2026 | 1.73% (0.01725) | 75.76th | v5 (v2026.06.15) |
| Aug 23, 2026 | 2.96% (0.02958) | 86.10th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.74% (0.01739) | 74.69th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00093) | 24.07th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.19% (0.00189) | 57.69th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.19% (0.00189) | 55.72th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.14% (0.00136) | 47.21th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.18% (0.01183) | 61.76th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.18% (0.01183) | 35.15th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.86% (0.01865) | 48.06th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.86% (0.01865) | 0.00th | v1 |
References (12)
- https://access.redhat.com/errata/RHSA-2019:2029 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2019:2043 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2018-13093 Vendor Advisory
- https://bugzilla.kernel.org/show_bug.cgi?id=199367 x_refsource_MISCIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1597766 Issue Tracking
- https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git/commit/?h=for-next&id=afca6c5b2595fc44383919fba740c194b0b76aff x_refsource_MISCPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/afca6c5b2595fc44383919fba740c194b0b76aff x_refsource_MISCPatch
- https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2018-13093
- https://usn.ubuntu.com/4094-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4118-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2018-13093
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2019:2029 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/errata/RHSA-2019:2043 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/security/cve/CVE-2018-13093 | Vendor Advisory | |
| https://bugzilla.kernel.org/show_bug.cgi?id=199367 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1597766 | Issue Tracking | |
| https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git/commit/?h=for-next&id=afca6c5b2595fc44383919fba740c194b0b76aff | x_refsource_MISCPatchThird Party Advisory | |
| https://github.com/torvalds/linux/commit/afca6c5b2595fc44383919fba740c194b0b76aff | x_refsource_MISCPatch | |
| https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html | mailing-listx_refsource_MLIST | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-13093 | ||
| https://usn.ubuntu.com/4094-1/ | vendor-advisoryx_refsource_UBUNTU | |
| https://usn.ubuntu.com/4118-1/ | vendor-advisoryx_refsource_UBUNTU | |
| https://www.cve.org/CVERecord?id=CVE-2018-13093 |
Change history (0)
No recorded changes yet.