kernel: Null pointer dereference due to missing key-size check in setkey function
Published May 23, 2017
5.5
MEDIUMCVSS 3.0
EPSS 0.39%
Description
The crypto_skcipher_init_tfm function in crypto/skcipher.c in the Linux kernel through 4.11.2 relies on a setkey function that lacks a key-size check, which allows local users to cause a denial of service (NULL pointer dereference) via a crafted application.
Affected products
No data.
- ≤ 4.11.2
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise MRG 2
kernel
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 | Affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel | 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:L/UI:N/S:U/C:N/I:N/A:H
AV:L/AC:L/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
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% (0.00390) | 30.62th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.39% (0.00390) | 32.94th | 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 | 0.55% (0.00553) | 12.78th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.55% (0.00553) | 0.00th | v1 |
References (7)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9933e113c2e87a9f46a40fde8dafbf801dca1ab9 x_refsource_CONFIRMPatch
- https://access.redhat.com/security/cve/CVE-2017-9211 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1454757 Issue Tracking
- https://github.com/torvalds/linux/commit/9933e113c2e87a9f46a40fde8dafbf801dca1ab9 x_refsource_CONFIRMPatch
- https://nvd.nist.gov/vuln/detail/CVE-2017-9211
- https://patchwork.kernel.org/patch/9718933/ x_refsource_CONFIRMMailing ListPatch
- https://www.cve.org/CVERecord?id=CVE-2017-9211
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9933e113c2e87a9f46a40fde8dafbf801dca1ab9 | x_refsource_CONFIRMPatch | |
| https://access.redhat.com/security/cve/CVE-2017-9211 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1454757 | Issue Tracking | |
| https://github.com/torvalds/linux/commit/9933e113c2e87a9f46a40fde8dafbf801dca1ab9 | x_refsource_CONFIRMPatch | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-9211 | ||
| https://patchwork.kernel.org/patch/9718933/ | x_refsource_CONFIRMMailing ListPatch | |
| https://www.cve.org/CVERecord?id=CVE-2017-9211 |
Change history (0)
No recorded changes yet.