Description
Race condition in net/packet/af_packet.c in the Linux kernel before 4.9.13 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a multithreaded application that makes PACKET_FANOUT setsockopt system calls.
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 | 4.9.13-1 | — |
| Debian 13 | linux | 4.9.13-1 | — |
| Debian 12 | linux | 4.9.13-1 | — |
| Debian 8 | linux | 3.16.39-1+deb8u2 | DSA-3804-1 |
| Debian 7 | linux | 3.2.86-1 | DLA-849-1 |
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-gcp +4 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-75.96 | USN-3265-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1016.25 | USN-3265-1 |
| Ubuntu 16.04 LTS | linux-gke | 4.4.0-1012.12 | USN-3265-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.10.0-32.36~16.04.1 | USN-3361-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1054.61 | USN-3265-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1057.61 | USN-3265-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-132.181 | USN-3422-1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-75.96~14.04.1 | USN-3265-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | kernel-default +1 | 4.4.59-92.17.3 | SUSE-SU-2017:1183-1 |
| SLES 12 SP2 | kernel-docs | 4.4.59-92.17.8 | SUSE-SU-2017:1183-1 |
| SLES 12 SP2 | kernel-syms +1 | 4.4.59-92.17.2 | SUSE-SU-2017:1183-1 |
| SLES 12 SP1 | kernel-docs | 3.12.74-60.64.40.4 | SUSE-SU-2017:1360-1 |
| SLES 12 SP1 | kernel-xen +4 | 3.12.74-60.64.40.1 | SUSE-SU-2017:1360-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.72.1 | SUSE-SU-2017:1360-1, SUSE-SU-2017:1247-1 |
| SLES 12 | kgraft-patch-SLE12_Update_21 | 1-2.1 | SUSE-SU-2017:1247-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | kernel-default | 4.4.59-92.17.3 | SUSE-SU-2017:1183-1 |
| SLES for SAP 12 SP2 | kernel-syms +1 | 4.4.59-92.17.2 | SUSE-SU-2017:1183-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.40.1 | SUSE-SU-2017:1360-1 |
| SLES for SAP 12 | kernel-xen +3 | 3.12.61-52.72.1 | SUSE-SU-2017:1247-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_21 | 1-2.1 | SUSE-SU-2017:1247-1 |
| SLE Real Time 12 SP2 | kernel-rt +3 | 4.4.74-7.10.1 | SUSE-SU-2017:1990-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_15 | 1-4.1 | SUSE-SU-2017:1360-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_7 | 1-2.3 | SUSE-SU-2017:1183-1 |
Advisories 10
- USN-3361-1 linux-hwe vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3422-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3265-1 linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-849-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3804-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3265-2 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:1183-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1247-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1360-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1990-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
References
- 96508 vdb-entry
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d199fab63c11998a602205f7ee7ff7c05c97164b
- https://source.android.com/security/bulletin/2017-09-01
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.13
- [oss-security] 20170228 Linux: packet: fix races in fanout_add() (CVE-2017-6346) mailing-list
- DSA-3804 vendor-advisory
- https://github.com/torvalds/linux/commit/d199fab63c11998a602205f7ee7ff7c05c97164b