CVE-2016-9793

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 7.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

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.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
73%
KEV
Not listed

Published

December 28, 2016

Last Modified

June 17, 2026

References (24)

Vendor Advisories for CVE-2016-9793(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-4.4.0-1040-raspi2 (4.4.0-1040.47) @ xenial2026-05-22ubuntu
ubuntulinux-image-3.13.0-107-generic-lpae (3.13.0-107.154~precise1) @ precise2026-05-22ubuntu
ubuntulinux-image-extra-4.4.0-59-generic (4.4.0-59.80~14.04.1) @ trusty2026-05-22ubuntu
ubuntulinux-image-4.8.0-34-powerpc-smp (4.8.0-34.36) @ yakkety2026-05-22ubuntu
ubuntulinux-image-4.4.0-1044-snapdragon (4.4.0-1044.48) @ xenial2026-05-22ubuntu
ubuntulinux-image-extra-3.13.0-107-generic (3.13.0-107.154) @ trusty2026-05-22ubuntu
ubuntulinux-image-extra-4.4.0-59-generic (4.4.0-59.80) @ xenial2026-05-22ubuntu
ubuntulinux-image-raspi2 (4.8.0.1022.25) @ yakkety2026-05-22ubuntu
redhatkernel-rt-1:3.10.0-514.rt56.219.el6rt2017-04-12redhat
redhatkernel-rt-0:3.10.0-514.16.1.rt56.437.el72017-04-12redhat
redhatkernel-0:3.10.0-514.16.1.el72017-04-12redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux—4.8.15-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—4.8.15-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—4.8.15-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—4.8.15-1—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
linux3.2.41-2 ... 3.2.82-1 (61 versions)3.2.84-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(10)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 3× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 125 total refreshes for this CVE.

  1. 2026-08-25 13:44 UTCEPSS rescore
  2. 2026-08-21 23:44 UTCEPSS rescore
  3. 2026-08-19 16:59 UTCEPSS rescore
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  23. 2026-07-29 16:07 UTCOSV refresh
  24. 2026-07-28 15:31 UTCEPSS rescore
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  1. 2026-07-25 14:13 UTCEPSS rescore
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  4. 2026-07-23 01:24 UTCEG score recompute
  5. 2026-07-22 22:04 UTCEG score recompute
  6. 2026-07-22 14:04 UTCEPSS rescore
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  23. 2026-07-12 05:43 UTCEPSS rescore
  24. 2026-07-12 05:43 UTCEPSS rescore
  25. 2026-07-12 05:22 UTCOSV refresh
  26. 2026-07-11 08:24 UTCEPSS rescore
  27. 2026-07-09 19:06 UTCEPSS rescore
  28. 2026-07-08 15:10 UTCEPSS rescore
  29. 2026-07-07 13:42 UTCEPSS rescore
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  44. 2026-06-24 14:02 UTCEPSS rescore
  45. 2026-06-23 21:30 UTCEPSS rescore
  46. 2026-06-23 11:30 UTCOSV refresh
  47. 2026-06-21 14:54 UTCEPSS rescore
  48. 2026-06-21 14:54 UTCEPSS rescore
  49. 2026-06-19 19:23 UTCEPSS rescore
  50. 2026-06-19 19:23 UTCEPSS rescore
  51. 2026-06-18 17:50 UTCEPSS rescore
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  61. 2026-06-12 23:09 UTCEPSS rescore
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  68. 2026-06-06 13:17 UTCOSV refresh
  69. 2026-06-05 22:44 UTCEPSS rescore
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  75. 2026-06-01 13:49 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-41995
    First seen Mar 22, 2017

    Linux Kernel 3.11 < 4.8 0 - 'SO_SNDBUFFORCE' / 'SO_RCVBUFFORCE' Local Privilege Escalation

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2016-9793?
CVE-2016-9793 is a high vulnerability published on December 28, 2016. The socksetsockopt function in net/core/sock.c in the Linux kernel before 4.8.14 mishandles negative values of sksndbuf and skrcvbuf, which allows local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact by leveraging the CAPNETADMIN…
When was CVE-2016-9793 disclosed?
CVE-2016-9793 was first published in the National Vulnerability Database on December 28, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-9793 actively exploited?
CVE-2016-9793 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 26.6% of all scored CVEs.
What is the CVSS score of CVE-2016-9793?
CVE-2016-9793 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2016-9793?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-9793, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2016-9793

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