kernel: vfs: refcount issues during unmount on symlink
Published Aug 1, 2014
6.2
MEDIUMCVSS 2.0
EPSS 0.49%
Description
The mountpoint_last function in fs/namei.c in the Linux kernel before 3.15.8 does not properly maintain a certain reference count during attempts to use the umount system call in conjunction with a symlink, which allows local users to cause a denial of service (memory consumption or use-after-free) or possibly have unspecified other impact via the umount program.
Affected products
No data.
Configuration 1
- < 3.15.8
Configuration 2
- 6.5
- 6.5
- 6.5
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-504.el6
Fixed · RHSA-2014:1392
Red Hat Enterprise Linux 6.5 Extended Update Support
kernel-0:2.6.32-431.46.2.el6
Fixed · RHSA-2015:0062
Red Hat Enterprise Linux 7
kernel-0:3.10.0-123.13.1.el7
Fixed · RHSA-2014:1971
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-504.el6 | Fixed | RHSA-2014:1392 |
| Red Hat Enterprise Linux 6.5 Extended Update Support | kernel-0:2.6.32-431.46.2.el6 | Fixed | RHSA-2015:0062 |
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-123.13.1.el7 | Fixed | RHSA-2014:1971 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect Linux kernel packages as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2. Future Linux kernel updates for Red Hat Enterprise Linux 6 and 7 may address this issue.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:L/AC:H/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
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.49% (0.00487) | 39.63th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.49% (0.00487) | 37.88th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.03% (0.00029) | 5.06th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01104) | 54.09th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.10% (0.01104) | 52.45th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.10% (0.01104) | 50.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.10% (0.01104) | 28.85th | v2 (v2022.01.01) |
References (11)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=295dc39d941dc2ae53d5c170365af4c9d5c16212 x_refsource_CONFIRM
- http://rhn.redhat.com/errata/RHSA-2015-0062.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://secunia.com/advisories/60353 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.8 x_refsource_CONFIRMPatchThird Party AdvisoryVendor Advisory
- http://www.openwall.com/lists/oss-security/2014/07/24/2 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/68862 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2014-5045 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1122472 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/295dc39d941dc2ae53d5c170365af4c9d5c16212 x_refsource_CONFIRMExploitPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2014-5045
- https://www.cve.org/CVERecord?id=CVE-2014-5045
Change history (0)
No recorded changes yet.