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CVE-2016-4557

Public on 2016-05-18
Modified on 2016-05-18
Description

The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor.

Severity
Important
See what this means
CVSS v3 Base Score
6.9
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2016-05-18 14:00 ALAS-2016-703

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv2 6.9 AV:L/AC:M/Au:N/C:C/I:C/A:C
NVD CVSSv2 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H