kernel: bpf/verifier.c allows local users to cause a denial of service by leveraging the lack of stack-pointer alignment enforcement
Published Dec 23, 2017
7.8
HIGHCVSS 3.1
EPSS 0.39%
Description
kernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging the lack of stack-pointer alignment enforcement.
Affected products
No data.
Configuration 1
- ≥ 4.14 · < 4.14.9
Configuration 2
- 9.0
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
Red Hat statement
This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
AV:L/AC:L/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
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (8 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.39% (0.00393) | 31.05th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.39% (0.00393) | 33.32th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.04% (0.00042) | 5.06th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00890) | 30.33th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00890) | 12.04th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.45% (0.00451) | 10.85th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.45% (0.00451) | 0.00th | v1 |
References (7)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a5ec6ae161d72f01411169a938fa5f8baea16e8f x_refsource_MISCVendor Advisory
- http://www.openwall.com/lists/oss-security/2017/12/21/2 x_refsource_MISCMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-17856 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1530273 Issue Tracking
- https://github.com/torvalds/linux/commit/a5ec6ae161d72f01411169a938fa5f8baea16e8f x_refsource_MISCPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-17856
- https://www.cve.org/CVERecord?id=CVE-2017-17856
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a5ec6ae161d72f01411169a938fa5f8baea16e8f | x_refsource_MISCVendor Advisory | |
| http://www.openwall.com/lists/oss-security/2017/12/21/2 | x_refsource_MISCMailing ListThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2017-17856 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1530273 | Issue Tracking | |
| https://github.com/torvalds/linux/commit/a5ec6ae161d72f01411169a938fa5f8baea16e8f | x_refsource_MISCPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-17856 | ||
| https://www.cve.org/CVERecord?id=CVE-2017-17856 |
Change history (0)
No recorded changes yet.