kernel: Use-after-free in try_merge_free_space() when mounting crafted btrfs image
Published Jul 27, 2018
5.5
MEDIUMCVSS 3.0
EPSS 2.52%
Description
An issue was discovered in the Linux kernel through 4.17.10. There is a use-after-free in try_merge_free_space() when mounting a crafted btrfs image, because of a lack of chunk type flag checks in btrfs_check_chunk_valid in fs/btrfs/volumes.c.
Affected products
No data.
Configuration 1
- ≤ 4.17.10
Configuration 2
- 8.0
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:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
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 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 | 2.52% (0.02518) | 84.27th | v5 (v2026.06.15) |
| Sep 22, 2026 | 2.52% (0.02518) | 84.14th | v5 (v2026.06.15) |
| Sep 21, 2026 | 5.09% (0.05088) | 92.00th | v5 (v2026.06.15) |
| Sep 6, 2026 | 2.52% (0.02518) | 83.78th | v5 (v2026.06.15) |
| Sep 5, 2026 | 5.09% (0.05088) | 91.83th | v5 (v2026.06.15) |
| Aug 30, 2026 | 2.52% (0.02518) | 83.69th | v5 (v2026.06.15) |
| Aug 28, 2026 | 5.09% (0.05088) | 91.78th | v5 (v2026.06.15) |
| Aug 24, 2026 | 2.52% (0.02518) | 83.61th | v5 (v2026.06.15) |
| Aug 23, 2026 | 5.09% (0.05088) | 91.74th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.52% (0.02518) | 82.72th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.10% (0.00103) | 25.81th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.10% (0.00096) | 41.96th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.09% (0.00094) | 38.98th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00079) | 32.30th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.27% (0.02273) | 50.89th | v5 (v2026.06.15) |
| Apr 14, 2021 | 2.27% (0.02273) | 0.00th | v1 |
References (14)
- http://www.securityfocus.com/bid/104917 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-14611 Vendor Advisory
- https://bugzilla.kernel.org/show_bug.cgi?id=199839 x_refsource_MISCExploitIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1610084 Issue Tracking
- https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html mailing-listx_refsource_MLISTMailing ListThird Party 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/msg00013.html mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2018-14611
- https://patchwork.kernel.org/patch/10503099/ x_refsource_MISCPatchThird Party Advisory
- https://usn.ubuntu.com/3932-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3932-2/ vendor-advisoryx_refsource_UBUNTU
- 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-2018-14611
Change history (0)
No recorded changes yet.