Description
The Linux kernel before 4.4.1 allows local users to bypass file-descriptor limits and cause a denial of service (memory consumption) by sending each descriptor over a UNIX socket before closing it, related to net/unix/af_unix.c and net/unix/garbage.c.
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 | 4.3.3-6 | — |
| Debian 13 | linux | 4.3.3-6 | — |
| Debian 12 | linux | 4.3.3-6 | — |
| Debian 8 | linux | 3.16.7-ckt20-1+deb8u3 | DSA-3503-1, DSA-3448-1 |
| Debian 7 | linux | 3.2.73-2+deb7u3 | DSA-3503-1 |
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 | 3.13.0-83.127 | USN-2929-1 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-67.87~14.04.1 | USN-2931-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-56.62~14.04.1 | USN-2932-1 |
| Ubuntu 14.04 LTS | linux-lts-wily | 4.2.0-30.35~14.04.1 | USN-2908-2 |
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-rt +10 | 3.10.0-514.rt56.420.el7 | RHSA-2016:2584 |
| RHEL 7 | perf +18 | 3.10.0-514.el7 | RHSA-2016:2574 |
| RHEL 6 | perf +16 | 2.6.32-642.el6 | RHSA-2016:0855 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | kernel-docs | 3.0.101-88.3 | SUSE-SU-2016:2976-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-88.1 | SUSE-SU-2016:2976-1 |
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.86.1 | SUSE-SU-2016:2245-1 |
| SLES 11 SP2 | kernel-ec2 +6 | 3.0.101-0.7.53.1 | SUSE-SU-2017:0333-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-88.1 | SUSE-SU-2016:2976-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-65.1 | SUSE-SU-2016:3069-1 |
| SUSE OpenStack Cloud 5 | kernel-ec2 +6 | 3.0.101-0.47.86.1 | SUSE-SU-2016:2245-1 |
| SUSE Manager Proxy 2.1 | kernel-ec2 +6 | 3.0.101-0.47.86.1 | SUSE-SU-2016:2245-1 |
| SUSE Manager 2.1 | kernel-ec2 +6 | 3.0.101-0.47.86.1 | SUSE-SU-2016:2245-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.86.1 | SUSE-SU-2016:2245-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.6.2.el6uek | 0.4.5-3.el6 | ELSA-2016-3565 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.6.2.el7uek | 0.4.5-3.el7 | ELSA-2016-3565 |
| Oracle Linux 7 | dtrace-modules-4.1.12-37.3.1.el6uek | 0.5.2-1.el6 | ELSA-2016-3559 |
| Oracle Linux 7 | dtrace-modules-4.1.12-37.3.1.el7uek | 0.5.2-1.el7 | ELSA-2016-3559 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.6.2.el7uek | ELSA-2016-3565, ELSA-2016-3559 |
| Oracle Linux 7 | perf +11 | 3.10.0-514.el7 | ELSA-2016-2574 |
Advisories 17
- RHSA-2016:2584 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:2574 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:0855 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-2929-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3503-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3448-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2931-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-2932-1 linux-lts-vivid vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-2908-2 linux-lts-wily vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2016:2976-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3069-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0333-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2245-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2024-0153 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 17, 2024
- ELSA-2016-2574 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 9, 2016
- ELSA-2016-3565 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 20, 2016
- ELSA-2016-3559 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 16, 2016
References
- RHSA-2016:0855 vendor-advisory
- https://github.com/torvalds/linux/commit/712f4aad406bb1ed67f3f98d04c044191f0ff593
- USN-2967-1 vendor-advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.1
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1297813
- DSA-3503 vendor-advisory
- USN-2967-2 vendor-advisory
- RHSA-2016:2584 vendor-advisory
- RHSA-2016:2574 vendor-advisory
- 82986 vdb-entry
- USN-2929-1 vendor-advisory
- USN-2932-1 vendor-advisory
- FEDORA-2016-5d43766e33 vendor-advisory
- https://security-tracker.debian.org/tracker/CVE-2013-4312
- USN-2931-1 vendor-advisory
- DSA-3448 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=712f4aad406bb1ed67f3f98d04c044191f0ff593
- USN-2929-2 vendor-advisory
- FEDORA-2016-2f25d12c51 vendor-advisory