kernel: Signed overflow for SO_{SND|RCV}BUFFORCE
Published Dec 28, 2016
7.8
HIGHCVSS 3.1
EPSS 1.57%
Description
The sock_setsockopt function in net/core/sock.c in the Linux kernel before 4.8.14 mishandles negative values of sk_sndbuf and sk_rcvbuf, which allows local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact by leveraging the CAP_NET_ADMIN capability for a crafted setsockopt system call with the (1) SO_SNDBUFFORCE or (2) SO_RCVBUFFORCE option.
Affected products
No data.
- ≥ 3.5 · < 3.12.69
- ≥ 3.13 · < 3.16.40
- ≥ 3.17 · < 3.18.52
- ≥ 3.19 · < 4.1.50
- ≥ 4.2 · < 4.4.38
- ≥ 4.5 · < 4.8.14
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-514.16.1.el7
Fixed · RHSA-2017:0933
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-514.16.1.rt56.437.el7
Fixed · RHSA-2017:0931
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-514.rt56.219.el6rt
Fixed · RHSA-2017:0932
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-0:3.10.0-514.16.1.el7 | Fixed | RHSA-2017:0933 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-514.16.1.rt56.437.el7 | Fixed | RHSA-2017:0931 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-514.rt56.219.el6rt | Fixed | RHSA-2017:0932 |
| 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 kernels as shipping with Red Hat Enterprise Linux 5 and 6. This issue does affect kernels 7, MRG-2 and realtime kernels and plans to be fixed in a future update.
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:L/PR:H/UI:N/S:U/C:H/I:H/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
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 | 1.57% (0.01566) | 74.40th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.57% (0.01566) | 71.99th | v5 (v2026.06.15) |
| Mar 17, 2025 | 2.11% (0.02108) | 82.90th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00045) | 17.92th | v3 (v2023.03.01) |
| May 1, 2024 | 0.04% (0.00045) | 14.51th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00045) | 12.47th | 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) |
References (15)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b98b0bc8c431e3ceb4b26b0dfc8db509518fb290 x_refsource_CONFIRMPatchVendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14 x_refsource_CONFIRMRelease NotesVendor Advisory
- http://www.openwall.com/lists/oss-security/2016/12/03/1 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/94655 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037968 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:0931 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0932 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0933 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2016-9793 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1402013 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/b98b0bc8c431e3ceb4b26b0dfc8db509518fb290 x_refsource_CONFIRMPatchVendor Advisory
- https://github.com/xairy/kernel-exploits/tree/master/CVE-2016-9793 x_refsource_MISCThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-9793
- https://source.android.com/security/bulletin/2017-03-01.html x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-9793
Change history (0)
No recorded changes yet.