kernel: crypto: GPF in lrw_crypt caused by null-deref
Published Nov 28, 2016
5.5
MEDIUMCVSS 3.0
EPSS 0.52%
Description
crypto/algif_skcipher.c in the Linux kernel before 4.4.2 does not verify that a setkey operation has been performed on an AF_ALG socket before an accept system call is processed, which allows local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted application that does not supply a key, related to the lrw_crypt function in crypto/lrw.c.
Affected products
No data.
- ≤ 4.4.1
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-693.el7
Fixed · RHSA-2017:1842
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-693.rt56.617.el7
Fixed · RHSA-2017:2077
Red Hat Enterprise Linux 7.3 Extended Update Support
kernel-0:3.10.0-514.28.1.el7
Fixed · RHSA-2017:2437
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-514.rt56.231.el6rt
Fixed · RHSA-2017:2444
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-693.el7 | Fixed | RHSA-2017:1842 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-693.rt56.617.el7 | Fixed | RHSA-2017:2077 |
| Red Hat Enterprise Linux 7.3 Extended Update Support | kernel-0:3.10.0-514.28.1.el7 | Fixed | RHSA-2017:2437 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-514.rt56.231.el6rt | Fixed | RHSA-2017:2444 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | 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 as the code with the flaw is not present in the products listed. This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2. Future Linux kernel updates for the respective releases might address this issue.
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
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 | 0.52% (0.00524) | 42.33th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.50% (0.00500) | 38.61th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.04% (0.00038) | 8.30th | 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 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 22, 2023 | 1.28% (0.01282) | 68.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
References (14)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dd504589577d8e8e70f51f997ad487a4cb6c026f x_refsource_CONFIRMIssue TrackingPatchVendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.2 x_refsource_CONFIRMRelease Notes
- http://www.openwall.com/lists/oss-security/2016/11/04/3 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/94217 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:1842 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2017:2077 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2017:2437 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2017:2444 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2015-8970 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1386286 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/dd504589577d8e8e70f51f997ad487a4cb6c026f x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://groups.google.com/forum/#%21msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2015-8970
- https://www.cve.org/CVERecord?id=CVE-2015-8970
Change history (0)
No recorded changes yet.