What is CVE-2019-11191?

CVE-2019-11191 is a low-severity vulnerability in Linux Kernel, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 2.5/10. Published 2019-04-12.

How severe is CVE-2019-11191?

Low severity. CVSS v3 base score is 2.5 out of 10.

Vulnerability in Linux Kernel

CVE-2019-11191

The Linux kernel through 5.0.7, when CONFIG_IA32_AOUT is enabled and ia32_aout is loaded, allows local users to bypass ASLR on setuid a.out programs (if any exist) because install_exec_creds() is called too late in load_aout_binary() in fs/binfmt_aout.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat. NOTE: the software maintainer disputes that this is a vulnerability because ASLR for a.out format executables has never been supported

Vulnerability class: Race Condition

Published 2019-04-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.5 (Low). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (40.7th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Linux Kernel

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

www.openwall.com/lists/oss-security/2019/04/03/4 (Exploit, Mailing List, Third Party Advisory)
www.openwall.com/lists/oss-security/2019/04/03/4/1 (Exploit, Mailing List, Third Party Advisory)
www.securityfocus.com/bid/107887 (VDB Entry, Third Party Advisory, vdb-entry)
www.openwall.com/lists/oss-security/2019/04/18/5 (mailing-list, Mailing List, Third Party Advisory)
www.openwall.com/lists/oss-security/2019/05/22/7 (mailing-list)
usn.ubuntu.com/4007-2/ (vendor-advisory)
usn.ubuntu.com/4008-1/ (vendor-advisory)
usn.ubuntu.com/4006-1/ (vendor-advisory)
usn.ubuntu.com/4006-2/ (vendor-advisory)
usn.ubuntu.com/4007-1/ (vendor-advisory)

Frequently asked questions

What is CVE-2019-11191?: CVE-2019-11191 is a low-severity vulnerability in Linux Kernel, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 2.5/10. Published 2019-04-12.
How severe is CVE-2019-11191?: Low severity. CVSS v3 base score is 2.5 out of 10.