CVE & CISA-KEV Catalog

CVE-2017-5551

MEDIUM
4.4
CVSS v3
NVD

Description

The simple_set_acl function in fs/posix_acl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-7097.

How to fix

Remediation Available
linuxDebian
Fixed in:4.9.6-1CVE-2017-5551
Fixed in:4.9.6-1CVE-2017-5551
Fixed in:4.9.6-1CVE-2017-5551
Fixed in:4.9.6-1CVE-2017-5551
linuxUbuntu
Fixed in:4.4.0-67.88USN-3234-1
linux-awsUbuntu
Fixed in:4.4.0-1009.18USN-3234-1
linux-gkeUbuntu
Fixed in:4.4.0-1006.6USN-3234-1
linux-hweUbuntu
Fixed in:4.10.0-27.30~16.04.2USN-3361-1
linux-image-4.10.0-27-genericUbuntu
Fixed in:4.10.0-27.30~16.04.2USN-3361-1
linux-image-4.10.0-27-generic-lpaeUbuntu
Fixed in:4.10.0-27.30~16.04.2USN-3361-1
linux-image-4.10.0-27-lowlatencyUbuntu
Fixed in:4.10.0-27.30~16.04.2USN-3361-1
linux-image-4.4.0-1006-gkeUbuntu
Fixed in:4.4.0-1006.6USN-3234-1
linux-image-4.4.0-1009-awsUbuntu
Fixed in:4.4.0-1009.18USN-3234-1
linux-image-4.4.0-1048-raspi2Ubuntu
Fixed in:4.4.0-1048.55USN-3234-1
linux-image-4.4.0-1051-snapdragonUbuntu
Fixed in:4.4.0-1051.55USN-3234-1
linux-image-4.4.0-67-genericUbuntu
Fixed in:4.4.0-67.88~14.04.1USN-3234-2
Fixed in:4.4.0-67.88USN-3234-1
linux-image-4.4.0-67-generic-lpaeUbuntu
Fixed in:4.4.0-67.88~14.04.1USN-3234-2
Fixed in:4.4.0-67.88USN-3234-1
linux-image-4.4.0-67-lowlatencyUbuntu
Fixed in:4.4.0-67.88~14.04.1USN-3234-2
Fixed in:4.4.0-67.88USN-3234-1
linux-image-4.4.0-67-powerpc-e500mcUbuntu
Fixed in:4.4.0-67.88~14.04.1USN-3234-2
Fixed in:4.4.0-67.88USN-3234-1
linux-image-4.4.0-67-powerpc-smpUbuntu
Fixed in:4.4.0-67.88~14.04.1USN-3234-2
Fixed in:4.4.0-67.88USN-3234-1
linux-image-4.4.0-67-powerpc64-embUbuntu
Fixed in:4.4.0-67.88~14.04.1USN-3234-2
Fixed in:4.4.0-67.88USN-3234-1
linux-image-4.4.0-67-powerpc64-smpUbuntu
Fixed in:4.4.0-67.88~14.04.1USN-3234-2
Fixed in:4.4.0-67.88USN-3234-1
linux-lts-xenialUbuntu
Fixed in:4.4.0-67.88~14.04.1USN-3234-2
linux-raspi2Ubuntu
Fixed in:4.4.0-1048.55USN-3234-1
linux-snapdragonUbuntu
Fixed in:4.4.0-1051.55USN-3234-1

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

ConfidentialityLow
IntegrityLow
AvailabilityNone

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

Exploit Intelligence

0.40%probability of exploitation in 30 days
32ndpercentile

Low risk: more likely to be exploited than 32% of all known CVEs.

References

Vendor Advisory1
Third-Party Advisory1
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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.