CVE-2019-11190

MEDIUM

Linux Kernel < 4.8 - Race Condition in ASLR Bypass via /proc/pid/stat

Title source: llm
STIX 2.1

Description

The Linux kernel before 4.8 allows local users to bypass ASLR on setuid programs (such as /bin/su) because install_exec_creds() is called too late in load_elf_binary() in fs/binfmt_elf.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat.

References (12)

Core 12
Core References
Exploit, Mailing List, Third Party Advisory x_refsource_misc
https://www.openwall.com/lists/oss-security/2019/04/03/4
Exploit, Mailing List, Third Party Advisory x_refsource_misc
https://www.openwall.com/lists/oss-security/2019/04/03/4/1
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/107890
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2019/04/15/1
Mailing List mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html
Mailing List mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4008-1/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4008-2/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4008-3/

Scores

CVSS v3 4.7
EPSS 0.0049
EPSS Percentile 38.0%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-362
Status published
Products (1)
linux/linux_kernel < 4.8
Published Apr 12, 2019
Tracked Since Feb 18, 2026