CVE-2016-9793: 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…
Noroxi assessment
Priority: Monitor (action score 31/100)
- Public proof-of-concept code exists (Exploit-DB, GitHub); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.5% (FIRST EPSS); higher than 75.7% of all records.
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: linux (Debian:12) 4.8.15-1; linux (Debian:7) 3.2.84-1; kernel (Red Hat:enterprise_linux:7::client) 0:3.10.0-514.16.1.el7.
Low priority for now. Upgrade to linux (Debian:12) 4.8.15-1; linux (Debian:7) 3.2.84-1; kernel (Red Hat:enterprise_linux:7::client) 0:3.10.0-514.16.1.el7 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- Dec 28, 2016
- Updated
- Jun 16, 2026
- EPSS
- 1.5% · 75th percentile
- CWE
- CWE-119
Report tools
Action score
31
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.5%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
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Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel3.5 and later · before 3.12.69
- linux linux kernel3.13 and later · before 3.16.40
- linux linux kernel3.17 and later · before 3.18.52
- linux linux kernel3.19 and later · before 4.1.50
- linux linux kernel4.2 and later · before 4.4.38
- linux linux kernel4.5 and later · before 4.8.14
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 4.8.15-1 | 4.8.15-1 |
| Debian:7 | linux | before 3.2.84-1 | 3.2.84-1 |
| Red Hat:enterprise_linux:7::client | kernel | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-abi-whitelists | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-debug | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-debug-debuginfo | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-debug-devel | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-debuginfo | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-debuginfo-common-x86_64 | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-devel | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-doc | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-headers | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-tools | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-tools-debuginfo | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-tools-libs | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-tools-libs-devel | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | perf | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | perf-debuginfo | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | python-perf | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::client | python-perf-debuginfo | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::server | kernel-bootwrapper | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::server | kernel-debuginfo-common-ppc64 | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::server | kernel-debuginfo-common-ppc64le | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
| Red Hat:enterprise_linux:7::server | kernel-debuginfo-common-s390x | before 0:3.10.0-514.16.1.el7 | 0:3.10.0-514.16.1.el7 |
+65
Same product
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- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2016-9756Dec 28, 2016 · arch/x86/kvm/emulate.c in the Linux kernel before 4.8.12 does not properly initialize Code Segment (CS) in certain error cases, which…22Monitor
- ← EarlierCVE-2016-9777Dec 28, 2016 · KVM in the Linux kernel before 4.8.12, when I/O APIC is enabled, does not properly restrict the VCPU index, which allows guest OS users to…31Monitor
- Later →CVE-2016-9794Dec 28, 2016 · Race condition in the snd_pcm_period_elapsed function in sound/core/pcm_lib.c in the ALSA subsystem in the Linux kernel before 4.7 allows…31Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:linux | 4.8.15-1 · Debian:12 | Package registry (OSV) |
| red hat:kernel-rt | 0:3.10.0-514.16.1.rt56.437.el7 · Red Hat:rhel_extras_rt:7 | Package registry (OSV) |
| red hat:kernel-rt-debug | 0:3.10.0-514.16.1.rt56.437.el7 · Red Hat:rhel_extras_rt:7 | Package registry (OSV) |
| red hat:kernel-rt-debug-debuginfo | 0:3.10.0-514.16.1.rt56.437.el7 · Red Hat:rhel_extras_rt:7 | Package registry (OSV) |
| red hat:kernel-rt-debug-devel | 0:3.10.0-514.16.1.rt56.437.el7 · Red Hat:rhel_extras_rt:7 | Package registry (OSV) |
| red hat:kernel-rt-debug-kvm | 0:3.10.0-514.16.1.rt56.437.el7 · Red Hat:rhel_extras_rt:7 | Package registry (OSV) |
| red hat:kernel-rt-debug-kvm-debuginfo | 0:3.10.0-514.16.1.rt56.437.el7 · Red Hat:rhel_extras_rt:7 | Package registry (OSV) |
| red hat:kernel-rt-debuginfo | 0:3.10.0-514.16.1.rt56.437.el7 · Red Hat:rhel_extras_rt:7 | Package registry (OSV) |
| red hat:kernel-rt-debuginfo-common-x86_64 | 0:3.10.0-514.16.1.rt56.437.el7 · Red Hat:rhel_extras_rt:7 | Package registry (OSV) |
| red hat:kernel-rt-devel | 0:3.10.0-514.16.1.rt56.437.el7 · Red Hat:rhel_extras_rt:7 | Package registry (OSV) |
| red hat:kernel-rt-doc | 0:3.10.0-514.16.1.rt56.437.el7 · Red Hat:rhel_extras_rt:7 | Package registry (OSV) |
| red hat:kernel-rt-kvm | 0:3.10.0-514.16.1.rt56.437.el7 · Red Hat:rhel_extras_rt:7 | Package registry (OSV) |
| red hat:kernel-rt-kvm-debuginfo | 0:3.10.0-514.16.1.rt56.437.el7 · Red Hat:rhel_extras_rt:7 | Package registry (OSV) |
| suse:kernel-compute | 3.12.69-60.30.1 · SUSE:Linux Enterprise Real Time 12 SP1 | Package registry (OSV) |
| suse:kernel-compute_debug | 3.12.69-60.30.1 · SUSE:Linux Enterprise Real Time 12 SP1 | Package registry (OSV) |
| suse:kernel-default | 4.4.38-93.1 · SUSE:Linux Enterprise Desktop 12 SP2 | Package registry (OSV) |
| suse:kernel-docs | 4.4.38-93.3 · SUSE:Linux Enterprise Software Development Kit 12 SP2 | Package registry (OSV) |
| suse:kernel-obs-build | 4.4.38-93.1 · SUSE:Linux Enterprise Software Development Kit 12 SP2 | Package registry (OSV) |
| suse:kernel-rt | 3.12.69-60.30.1 · SUSE:Linux Enterprise Real Time 12 SP1 | Package registry (OSV) |
| suse:kernel-rt_debug | 3.12.69-60.30.1 · SUSE:Linux Enterprise Real Time 12 SP1 | Package registry (OSV) |
| suse:kernel-source | 4.4.38-93.1 · SUSE:Linux Enterprise Desktop 12 SP2 | Package registry (OSV) |
| suse:kernel-source-rt | 3.12.69-60.30.1 · SUSE:Linux Enterprise Real Time 12 SP1 | Package registry (OSV) |
| suse:kernel-syms | 4.4.38-93.1 · SUSE:Linux Enterprise Desktop 12 SP2 | Package registry (OSV) |
| suse:kernel-syms-rt | 3.12.69-60.30.1 · SUSE:Linux Enterprise Real Time 12 SP1 | Package registry (OSV) |
| suse:kgraft-patch-SLE12-SP2_Update_4 | 1-2.1 · SUSE:Linux Enterprise Live Patching 12 | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | local | 2017-03-22 |
| Proof-of-concept repository on GitHub | stars:0 | 2026-07-15 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+84 d
- TodayNov 15, 2026+3610 d
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Not on record for this CVE: EPSS history · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Buffer ManipulationCAPEC-123likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
ATT&CK techniques
—
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (10 more)Show less
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14
- www.openwall.com/lists/oss-security/2016/12/03/1
- www.securityfocus.com/bid/94655
- www.securitytracker.com/id/1037968
- access.redhat.com/errata/RHSA-2017:0931
- access.redhat.com/errata/RHSA-2017:0932
- access.redhat.com/errata/RHSA-2017:0933
- bugzilla.redhat.com/show_bug.cgi?id=1402013
- github.com/torvalds/linux/commit/b98b0bc8c431e3ceb4b26b0dfc8db509518fb290
- source.android.com/security/bulletin/2017-03-01.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.