Description
Race condition in the netlink_dump function in net/netlink/af_netlink.c in the Linux kernel before 4.6.3 allows local users to cause a denial of service (double free) or possibly have unspecified other impact via a crafted application that makes sendmsg system calls, leading to a free operation associated with a new dump that started earlier than anticipated.
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 | 4.6.3-1 | — |
| Debian 13 | linux | 4.6.3-1 | — |
| Debian 12 | linux | 4.6.3-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux | 4.4.0-34.53 | — |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1019.25 | — |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1022.25 | — |
| Ubuntu 14.04 LTS | linux | 3.13.0-107.154 | USN-3168-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-79.87~14.04.1 | — |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-34.53~14.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-693.rt56.617.el7 | RHSA-2017:2077 |
| RHEL 7 | perf +17 | 3.10.0-693.el7 | RHSA-2017:1842 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +10 | 1:3.10.0-693.2.1.rt56.585.el6rt | RHSA-2017:2669 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | kernel-docs | 4.4.49-92.11.3 | SUSE-SU-2017:0575-1 |
| SLES 12 SP2 | kernel-syms +3 | 4.4.49-92.11.1 | SUSE-SU-2017:0575-1 |
| SLES 12 SP1 | kernel-docs | 3.12.69-60.64.29.3 | SUSE-SU-2017:0464-1 |
| SLES 12 SP1 | kernel-xen +4 | 3.12.69-60.64.29.1 | SUSE-SU-2017:0464-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.66.1 | SUSE-SU-2017:0471-1, SUSE-SU-2017:0464-1 |
| SLES 12 | kgraft-patch-SLE12_Update_10 | 8-2.1 | SUSE-SU-2017:0247-1 |
| SLES 12 | kgraft-patch-SLE12_Update_11 | 7-2.1 | SUSE-SU-2017:0268-1 |
| SLES 12 | kgraft-patch-SLE12_Update_12 +3 | 5-2.1 | SUSE-SU-2017:0249-1, SUSE-SU-2017:0248-1, SUSE-SU-2017:0246-1 |
| SLES 12 | kgraft-patch-SLE12_Update_16 | 3-2.1 | SUSE-SU-2017:0245-1 |
| SLES 12 | kgraft-patch-SLE12_Update_17 +1 | 2-2.1 | SUSE-SU-2017:0303-1, SUSE-SU-2017:0267-1 |
| SLES 12 | kgraft-patch-SLE12_Update_19 | 1-2.1 | SUSE-SU-2017:0471-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.49-92.11.1 | SUSE-SU-2017:0575-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.69-60.64.29.1 | SUSE-SU-2017:0464-1 |
| SLES for SAP 12 | kernel-xen +3 | 3.12.61-52.66.1 | SUSE-SU-2017:0471-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_10 | 8-2.1 | SUSE-SU-2017:0247-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_11 | 7-2.1 | SUSE-SU-2017:0268-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_12 +3 | 5-2.1 | SUSE-SU-2017:0249-1, SUSE-SU-2017:0248-1, SUSE-SU-2017:0246-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_16 | 3-2.1 | SUSE-SU-2017:0245-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_17 +1 | 2-2.1 | SUSE-SU-2017:0303-1, SUSE-SU-2017:0267-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_19 | 1-2.1 | SUSE-SU-2017:0471-1 |
| SLE Real Time 12 SP1 | kernel-rt +5 | 3.12.69-60.30.1 | SUSE-SU-2017:0407-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_12 | 1-4.1 | SUSE-SU-2017:0464-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_2 | 8-2.1 | SUSE-SU-2017:0231-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_3 | 7-2.1 | SUSE-SU-2017:0233-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_4 +2 | 6-2.1 | SUSE-SU-2017:0235-1, SUSE-SU-2017:0234-1, SUSE-SU-2017:0230-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_5 | 1-6.1 | SUSE-SU-2017:0575-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-4.1.12-61.1.25.el6uek | 0.5.3-2.el6 | ELSA-2017-3508 |
| Oracle Linux 7 | dtrace-modules-4.1.12-61.1.25.el7uek | 0.5.3-2.el7 | ELSA-2017-3508 |
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-61.1.25.el7uek | ELSA-2017-3508 |
| Oracle Linux 7 | perf +11 | 3.10.0-693.el7 | ELSA-2017-1842 |
Advisories 24
- RHSA-2017:2669 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:2077 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:1842 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- USN-3168-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- SUSE-SU-2017:0234-1 Security update for Linux Kernel Live Patch 4 for SLE 12 SP1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0233-1 Security update for Linux Kernel Live Patch 3 for SLE 12 SP1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0267-1 Security update for Linux Kernel Live Patch 17 for SLE 12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0471-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0268-1 Security update for Linux Kernel Live Patch 11 for SLE 12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0244-1 Security update for Linux Kernel Live Patch 12 for SLE 12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0248-1 Security update for Linux Kernel Live Patch 14 for SLE 12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0464-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0231-1 Security update for Linux Kernel Live Patch 2 for SLE 12 SP1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0575-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0407-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0235-1 Security update for Linux Kernel Live Patch 5 for SLE 12 SP1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0247-1 Security update for Linux Kernel Live Patch 10 for SLE 12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0245-1 Security update for Linux Kernel Live Patch 16 for SLE 12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0303-1 Security update for Linux Kernel Live Patch 18 for SLE 12 SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2017:0246-1 Security update for Linux Kernel Live Patch 15 for SLE 12 SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2017:0249-1 Security update for Linux Kernel Live Patch 13 for SLE 12 SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2017:0230-1 Security update for Linux Kernel Live Patch 6 for SLE 12 SP1 SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2017-1842 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 7, 2017
- ELSA-2017-3508 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 12, 2017
References
- 94653 vdb-entry
- 1037968 vdb-entry
- [oss-security] 20161203 CVE Request: -- Linux kernel: double free in netlink_dump mailing-list
- RHSA-2017:2669 vendor-advisory
- https://github.com/torvalds/linux/commit/92964c79b357efd980812c4de5c1fd2ec8bb5520
- [netdev] 20160515 BUG: use-after-free in netlink_dump mailing-list
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92964c79b357efd980812c4de5c1fd2ec8bb5520
- RHSA-2017:2077 vendor-advisory
- RHSA-2017:1842 vendor-advisory
- https://source.android.com/security/bulletin/2017-03-01.html
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.3
- https://bugzilla.redhat.com/show_bug.cgi?id=1401502