kernel: mm/pagewalk.c: walk_hugetlb_range function mishandles holes in hugetlb ranges causing information leak
Published Nov 27, 2017
5.5
MEDIUMCVSS 3.0
EPSS 2.08%
Description
The walk_hugetlb_range function in mm/pagewalk.c in the Linux kernel before 4.14.2 mishandles holes in hugetlb ranges, which allows local users to obtain sensitive information from uninitialized kernel memory via crafted use of the mincore() system call.
Affected products
No data.
- < 4.14.2
No data.
Red Hat Enterprise Linux 7
kernel-alt-0:4.11.0-44.6.1.el7a
Fixed · RHSA-2018:0502
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-rt
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-alt-0:4.11.0-44.6.1.el7a | Fixed | RHSA-2018:0502 |
| 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-rt | 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 the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2, as a code with the flaw is not present in the products listed. This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 7 for ARM and Red Hat Enterprise Linux 7 for Power LE in the "kernel-alt" packages.
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:L/UI:N/S:U/C:H/I:N/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
AV:L/AC:L/Au:N/C:P/I:N/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 2, 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 (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 2.08% (0.02084) | 80.89th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.08% (0.02084) | 79.05th | v5 (v2026.06.15) |
| Mar 30, 2025 | 4.80% (0.04800) | 88.48th | v4 (v2025.03.14) |
| Mar 29, 2025 | 8.23% (0.08228) | 86.77th | v4 (v2025.03.14) |
| Mar 28, 2025 | 4.80% (0.04800) | 88.49th | v4 (v2025.03.14) |
| Mar 27, 2025 | 8.23% (0.08228) | 91.01th | v4 (v2025.03.14) |
| Mar 20, 2025 | 5.21% (0.05206) | 89.06th | v4 (v2025.03.14) |
| Mar 19, 2025 | 8.23% (0.08228) | 91.16th | v4 (v2025.03.14) |
| Mar 17, 2025 | 5.21% (0.05206) | 89.21th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00044) | 12.38th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.04% (0.00044) | 10.49th | v3 (v2023.03.01) |
| May 8, 2023 | 0.04% (0.00044) | 8.46th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00064) | 25.87th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.53% (0.03534) | 84.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.53% (0.03534) | 83.33th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.53% (0.03534) | 66.49th | v2 (v2022.01.01) |
| Feb 3, 2022 | 6.60% (0.06596) | 82.90th | v1 |
| Jan 6, 2022 | 6.60% (0.06596) | 82.73th | v1 |
| Sep 1, 2021 | 6.60% (0.06596) | 90.52th | v1 |
| Apr 14, 2021 | 6.60% (0.06596) | 0.00th | v1 |
References (17)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=373c4557d2aa362702c4c2d41288fb1e54990b7c x_refsource_CONFIRMPatch
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.2 x_refsource_CONFIRMRelease Notes
- http://www.securityfocus.com/bid/101969 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0502 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2017-16994 Vendor Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1431 x_refsource_CONFIRMExploitIssue TrackingPatch
- https://bugzilla.redhat.com/show_bug.cgi?id=1518155 Issue Tracking
- https://github.com/torvalds/linux/commit/373c4557d2aa362702c4c2d41288fb1e54990b7c x_refsource_CONFIRMPatch
- https://nvd.nist.gov/vuln/detail/CVE-2017-16994
- https://usn.ubuntu.com/3617-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3617-2/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3617-3/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3619-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3619-2/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3632-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2017-16994
- https://www.exploit-db.com/exploits/43178/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
Change history (0)
No recorded changes yet.