Description
The vdso_addr function in arch/x86/vdso/vma.c in the Linux kernel through 3.18.2 does not properly choose memory locations for the vDSO area, which makes it easier for local users to bypass the ASLR protection mechanism by guessing a location at the end of a PMD.
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 | 3.16.7-ckt4-1 | — |
| Debian 13 | linux | 3.16.7-ckt4-1 | — |
| Debian 12 | linux | 3.16.7-ckt4-1 | — |
| Debian 7 | linux | 3.2.65-1+deb7u2 | DSA-3170-1 |
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze11 | DLA-155-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-riscv +6 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +4 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +3 | No fix yet | — |
| Ubuntu 14.04 LTS | linux | 3.13.0-46.75 | USN-2516-1 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-31.41~14.04.1 | USN-2517-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-kdump +4 | 3.10.0-229.14.1.el7 | RHSA-2015:1778 |
| RHEL 7 | kernel-rt +7 | 3.10.0-229.14.1.rt56.141.13.el7_1 | RHSA-2015:1788 |
| RHEL 7 | perf +13 | 3.10.0-229.14.1.ael7b | RHSA-2015:1778 |
| RHEL 6 | perf +16 | 2.6.32-504.23.4.el6 | RHSA-2015:1081 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +10 | 1:3.10.0-229.rt56.161.el6rt | RHSA-2015:1787 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-68.3.2.el6uek | 0.4.3-4.el6 | ELSA-2015-3041 |
| Oracle Linux 7 | dtrace-modules-3.8.13-68.3.2.el7uek | 0.4.3-4.el7 | ELSA-2015-3041 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-68.3.2.el7uek | ELSA-2015-3041 |
| Oracle Linux 7 | perf +11 | 3.10.0-229.14.1.el7 | ELSA-2015-1778 |
Advisories 10
- RHSA-2015:1788 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:1778 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:1787 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:1081 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-2516-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3170-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-155-1 linux-2.6 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2517-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- ELSA-2015-1778 Important: kernel security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 15, 2015
- ELSA-2015-3041 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 10, 2015
References
- http://git.kernel.org/?p=linux/kernel/git/tip/tip.git%3Ba=commit%3Bh=fbe1bf140671619508dfa575d74a185ae53c5dbb
- USN-2515-1 vendor-advisory
- DSA-3170 vendor-advisory
- SUSE-SU-2015:0736 vendor-advisory
- SUSE-SU-2015:0652 vendor-advisory
- RHSA-2015:1778 vendor-advisory
- SUSE-SU-2015:0178 vendor-advisory
- USN-2514-1 vendor-advisory
- FEDORA-2015-0937 vendor-advisory
- [oss-security] 20150109 Re: PIE bypass using VDSO ASLR weakness - Linux kernel mailing-list
- USN-2518-1 vendor-advisory
- RHSA-2015:1787 vendor-advisory
- SUSE-SU-2015:0481 vendor-advisory
- MDVSA-2015:058 vendor-advisory
- openSUSE-SU-2015:0566 vendor-advisory
- 71990 vdb-entry
- [oss-security] 20141209 PIE bypass using VDSO ASLR weakness mailing-list
- USN-2517-1 vendor-advisory
- http://v0ids3curity.blogspot.in/2014/12/return-to-vdso-using-elf-auxiliary.html
- openSUSE-SU-2015:0714 vendor-advisory
- USN-2516-1 vendor-advisory
- USN-2513-1 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/luto/linux.git%3Ba=commit%3Bh=bc3b94c31d65e761ddfe150d02932c65971b74e2
- RHSA-2015:1081 vendor-advisory