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Vulnerability record · CVE-2019-11191 · published 12 April 2019

CVE-2019-11191: Linux kernel race condition vulnerability

Linux · Linux Kernel

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

2.5 CVSS 3.0 Low EPSS 0.50% · top 59.6% CWE-362 · Race condition
2.5CVSS 3.0 base score, v2 1.9
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
24References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
http://www.openwall.com/lists/oss-security/2019/04/18/5 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2019/05/22/7
http://www.securityfocus.com/bid/107887 Third Party AdvisoryVDB Entry
https://usn.ubuntu.com/4006-1/
https://usn.ubuntu.com/4006-2/
https://usn.ubuntu.com/4007-1/
https://usn.ubuntu.com/4007-2/
https://usn.ubuntu.com/4008-1/
https://usn.ubuntu.com/4008-3/
https://www.openwall.com/lists/oss-security/2019/04/03/4 ExploitMailing ListThird Party Advisory
https://www.openwall.com/lists/oss-security/2019/04/03/4/1 ExploitMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
http://www.openwall.com/lists/oss-security/2019/04/18/5 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2019/05/22/7
http://www.securityfocus.com/bid/107887 Third Party AdvisoryVDB Entry
https://usn.ubuntu.com/4006-1/
https://usn.ubuntu.com/4006-2/
https://usn.ubuntu.com/4007-1/
https://usn.ubuntu.com/4007-2/
https://usn.ubuntu.com/4008-1/
https://usn.ubuntu.com/4008-3/
https://www.openwall.com/lists/oss-security/2019/04/03/4 ExploitMailing ListThird Party Advisory
https://www.openwall.com/lists/oss-security/2019/04/03/4/1 ExploitMailing ListThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-11191), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.