CVE-2016-4557

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.

CVSS v3.1

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

7.2 HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS

10.20% chance of exploitation in the next 30 days, 95th percentile

Published

2016-05-23

Updated

2024-08-06

Proof-of-concept exploits (1)

• s0nk3y/php-kernel-exploit3★ · 2016-07-20

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/bpf_priv_esc.rb

ExploitDB entries (2)

• https://www.exploit-db.com/exploits/40759
• https://www.exploit-db.com/exploits/39772

References

• CVE Record
• NVD entry

Related

• CVE-2016-4544
• CVE-2016-4558
• CVE-2016-4535
• CVE-2016-4566
• CVE-2016-4534
• CVE-2016-4567