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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.8.5-1 | — |
| Debian 13 | linux | 4.8.5-1 | — |
| Debian 12 | linux | 4.8.5-1 | — |
| Debian 8 | linux | 3.16.68-1 | DLA-1799-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1053.57 | — |
| Ubuntu 16.04 LTS | apparmor | 2.10.95-0ubuntu2.11 | USN-4008-2 |
| Ubuntu 16.04 LTS | linux | 4.4.0-150.176 | USN-4008-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1084.94 | USN-4008-1 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1047.53 | USN-4008-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1110.118 | USN-4008-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1114.119 | USN-4008-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1011.14 | — |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1054.58 | USN-4008-3 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-164.192~14.04.1 | USN-4008-3 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-1127.rt56.1093.el7 | RHSA-2020:1070 |
| RHEL 7 | perf +18 | 3.10.0-1127.el7 | RHSA-2020:1016 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-azure +2 | 4.4.180-4.31.1 | SUSE-SU-2019:1527-1 |
| SLES 12 SP3 | kernel-docs +4 | 4.4.180-94.97.1 | SUSE-SU-2019:1532-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.114.1 | SUSE-SU-2019:1534-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_30 | 1-3.5.1 | SUSE-SU-2019:1534-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.115.1 | SUSE-SU-2019:1533-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_34 | 1-2.5.1 | SUSE-SU-2019:1533-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.154.1 | SUSE-SU-2019:1692-1, SUSE-SU-2019:1533-1 |
| SLES 12 | kgraft-patch-SLE12_Update_40 | 1-1.5.1 | SUSE-SU-2019:1692-1 |
| SLES 11 SP4 | kernel-ec2 +6 | 3.0.101-108.95.2 | SUSE-SU-2019:14089-1 |
| SLES 11 SP4 | kernel-syms +1 | 3.0.101-108.95.1 | SUSE-SU-2019:14089-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | kernel-azure +2 | 4.4.180-4.31.1 | SUSE-SU-2019:1527-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.97.1 | SUSE-SU-2019:1532-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.114.1 | SUSE-SU-2019:1534-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_30 | 1-3.5.1 | SUSE-SU-2019:1534-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.115.1 | SUSE-SU-2019:1533-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_34 | 1-2.5.1 | SUSE-SU-2019:1533-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_26 | 1-4.3.3 | SUSE-SU-2019:1532-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.114.1 | SUSE-SU-2019:1534-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_30 | 1-3.5.1 | SUSE-SU-2019:1534-1 |
| SUSE Enterprise Storage 4 | kernel-syms +2 | 4.4.121-92.114.1 | SUSE-SU-2019:1534-1 |
| SUSE Enterprise Storage 4 | kgraft-patch-SLE12-SP2_Update_30 | 1-3.5.1 | SUSE-SU-2019:1534-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.34.1.el6uek | 0.4.5-3.el6 | ELSA-2019-4644 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.34.1.el7uek | 0.4.5-3.el7 | ELSA-2019-4644 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.34.1.el7uek | ELSA-2019-4644, ELSA-2019-4642 |
| Oracle Linux 7 | perf +12 | 3.10.0-1127.el7 | ELSA-2020-1016 |
Advisories 15
- USN-4008-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- RHSA-2020:1070 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:1016 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-4008-3 linux-lts-xenial, linux-aws vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4008-2 apparmor update Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-1799-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:1534-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14089-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1532-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1527-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1692-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1533-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2020-1016 Moderate: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 6, 2020
- ELSA-2019-4644 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 16, 2019
- ELSA-2019-4642 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 15, 2019
References
- https://www.openwall.com/lists/oss-security/2019/04/03/4
- https://www.openwall.com/lists/oss-security/2019/04/03/4/1
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/commit/?id=a5b5352558f6808db0589644ea5401b3e3148a0d
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/commit/?id=e1676b55d874a43646e8b2c46d87f2f3e45516ff
- 107890 vdb-entry
- [oss-security] 20190415 Re: Linux kernel < 4.8 local generic ASLR - CVE-ID mailing-list
- [debian-lts-announce] 20190528 [SECURITY] [DLA 1799-1] linux security update mailing-list
- [debian-lts-announce] 20190528 [SECURITY] [DLA 1799-2] linux security update mailing-list
- USN-4008-1 vendor-advisory
- USN-4008-2 vendor-advisory
- USN-4008-3 vendor-advisory
- openSUSE-SU-2019:1570 vendor-advisory