CVEvulnerability

CVE-2017-5551

4.4 MEDIUM Published 2017-02-06 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2017-02-06
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
4.4 MEDIUM — CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 2.0 ([email protected])
3.6 LOW — AV:L/AC:L/Au:N/C:P/I:P/A:N

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.

Affected configurations

• linux linux kernel (<= 4.9.5)

References