CVE & CISA-KEV Catalog

CVE-2017-17448

HIGH
7.8
CVSS v3
NVD

Description

net/netfilter/nfnetlink_cthelper.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability for new, get, and del operations, which allows local users to bypass intended access restrictions because the nfnl_cthelper_list data structure is shared across all net namespaces.

CWE-862Missing Authorization

How to fix

Remediation Available
linuxDebian
Fixed in:4.14.7-1CVE-2017-17448
Fixed in:4.14.7-1CVE-2017-17448
Fixed in:4.14.7-1CVE-2017-17448
Fixed in:4.14.7-1CVE-2017-17448
linuxUbuntu
Fixed in:3.13.0-144.193USN-3620-1
Fixed in:4.4.0-119.143USN-3619-1
linux-awsUbuntu
Fixed in:4.4.0-1016.16USN-3619-2
Fixed in:4.4.0-1054.63USN-3619-1
linux-azureUbuntu
Fixed in:4.13.0-1014.17USN-3632-1
linux-gcpUbuntu
Fixed in:4.13.0-1012.16USN-3617-2
linux-hweUbuntu
Fixed in:4.13.0-38.43~16.04.1USN-3617-2
linux-image-3.13.0-144-genericUbuntu
Fixed in:3.13.0-144.193USN-3620-1
linux-image-3.13.0-144-generic-lpaeUbuntu
Fixed in:3.13.0-144.193USN-3620-1
linux-image-3.13.0-144-lowlatencyUbuntu
Fixed in:3.13.0-144.193USN-3620-1
linux-image-3.13.0-144-powerpc-e500Ubuntu
Fixed in:3.13.0-144.193USN-3620-1
linux-image-3.13.0-144-powerpc-e500mcUbuntu
Fixed in:3.13.0-144.193USN-3620-1
linux-image-3.13.0-144-powerpc-smpUbuntu
Fixed in:3.13.0-144.193USN-3620-1
linux-image-3.13.0-144-powerpc64-embUbuntu
Fixed in:3.13.0-144.193USN-3620-1
linux-image-3.13.0-144-powerpc64-smpUbuntu
Fixed in:3.13.0-144.193USN-3620-1
linux-image-4.13.0-1012-gcpUbuntu
Fixed in:4.13.0-1012.16USN-3617-2
linux-image-4.13.0-1014-azureUbuntu
Fixed in:4.13.0-1014.17USN-3632-1
linux-image-4.13.0-1022-oemUbuntu
Fixed in:4.13.0-1022.24USN-3617-2
linux-image-4.13.0-38-genericUbuntu
Fixed in:4.13.0-38.43~16.04.1USN-3617-2
linux-image-4.13.0-38-generic-lpaeUbuntu
Fixed in:4.13.0-38.43~16.04.1USN-3617-2
linux-image-4.13.0-38-lowlatencyUbuntu
Fixed in:4.13.0-38.43~16.04.1USN-3617-2
linux-image-4.4.0-1016-awsUbuntu
Fixed in:4.4.0-1016.16USN-3619-2
linux-image-4.4.0-1020-kvmUbuntu
Fixed in:4.4.0-1020.25USN-3619-1
linux-image-4.4.0-1054-awsUbuntu
Fixed in:4.4.0-1054.63USN-3619-1
linux-image-4.4.0-1086-raspi2Ubuntu
Fixed in:4.4.0-1086.94USN-3619-1
linux-image-4.4.0-1088-snapdragonUbuntu
Fixed in:4.4.0-1088.93USN-3619-1
linux-image-4.4.0-119-genericUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-image-4.4.0-119-generic-lpaeUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-image-4.4.0-119-lowlatencyUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-image-4.4.0-119-powerpc-e500mcUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-image-4.4.0-119-powerpc-smpUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-image-4.4.0-119-powerpc64-embUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-image-4.4.0-119-powerpc64-smpUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-kvmUbuntu
Fixed in:4.4.0-1020.25USN-3619-1
linux-lts-xenialUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
linux-oemUbuntu
Fixed in:4.13.0-1022.24USN-3617-2
linux-raspi2Ubuntu
Fixed in:4.4.0-1086.94USN-3619-1
linux-snapdragonUbuntu
Fixed in:4.4.0-1088.93USN-3619-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.37%probability of exploitation in 30 days
29thpercentile

Low risk: more likely to be exploited than 29% of all known CVEs.

References

Third-Party Advisory1

Related Vulnerabilities

Other CWE-862 (Missing Authorization) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2021-39226Critical9.8100%KEVFix
CVE-2022-0543Critical10.0100%KEVFix
CVE-2021-21978Critical9.899%-Fix
CVE-2023-52163High8.896%KEV-
CVE-2022-1329High8.893%--
CVE-2023-6875Critical9.890%--
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.