Description
net/netfilter/xt_osf.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability for add_callback and remove_callback operations, which allows local users to bypass intended access restrictions because the xt_osf_fingers data structure is shared across all net namespaces.
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 | 4.14.7-1 | — |
| Debian 13 | linux | 4.14.7-1 | — |
| Debian 12 | linux | 4.14.7-1 | — |
| Debian 9 | linux | 4.9.65-3+deb9u1 | DSA-4073-1 |
| Debian 8 | linux | 3.16.51-3+deb8u1 | DSA-4082-1 |
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 16.04 LTS | linux | 4.4.0-119.143 | USN-3619-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1054.63 | USN-3619-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.13.0-1014.17 | USN-3632-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.13.0-1012.16 | USN-3617-2 |
| Ubuntu 16.04 LTS | linux-hwe | 4.13.0-41.46~16.04.1 | USN-3617-2 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1020.25 | USN-3619-1 |
| Ubuntu 16.04 LTS | linux-oem | 4.13.0-1022.24 | USN-3617-2 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1086.94 | USN-3619-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1088.93 | USN-3619-1 |
| Ubuntu 14.04 LTS | linux | 3.13.0-142.191 | USN-3583-1 |
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1016.16 | USN-3619-2 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-119.143~14.04.1 | USN-3619-2 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1008.10 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-docs +4 | 4.4.103-6.33.1 | SUSE-SU-2017:3398-1 |
| SLES 12 SP2 | kernel-docs +4 | 4.4.103-92.53.1 | SUSE-SU-2017:3410-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.69.1 | SUSE-SU-2018:0031-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_24 | 1-2.3.1 | SUSE-SU-2018:0031-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.111.1 | SUSE-SU-2018:0115-1, SUSE-SU-2018:0031-1 |
| SLES 11 SP4 | kernel-docs | 3.0.101-108.21.2 | SUSE-SU-2018:0011-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-108.21.1 | SUSE-SU-2018:0011-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.106.11.1 | SUSE-SU-2018:0040-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.103-6.33.1 | SUSE-SU-2017:3398-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.103-92.53.1 | SUSE-SU-2017:3410-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.69.1 | SUSE-SU-2018:0031-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_24 | 1-2.3.1 | SUSE-SU-2018:0031-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-108.21.1 | SUSE-SU-2018:0011-1 |
| SLE Real Time 12 SP2 | kernel-rt +3 | 4.4.104-24.1 | SUSE-SU-2018:0213-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-69.14.1 | SUSE-SU-2018:0180-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_6 | 1-4.3.1 | SUSE-SU-2017:3398-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_16 | 1-3.3.1 | SUSE-SU-2017:3410-1 |
| SUSE OpenStack Cloud 6 | kernel-xen +3 | 3.12.74-60.64.69.1 | SUSE-SU-2018:0031-1 |
| SUSE OpenStack Cloud 6 | kgraft-patch-SLE12-SP1_Update_24 | 1-2.3.1 | SUSE-SU-2018:0031-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.106.11.1 | SUSE-SU-2018:0040-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 5.14.6-1.4 | openSUSE-SU-2024:13704-1, openSUSE-SU-2024:10728-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.29.1.el6uek | 0.4.5-3.el6 | ELSA-2019-4316 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.29.1.el7uek | 0.4.5-3.el7 | ELSA-2019-4316 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.29.1.el7uek | ELSA-2019-4316 |
Advisories 18
- USN-3619-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3583-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4073-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4082-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3632-1 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3619-2 linux-lts-xenial, linux-aws vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3617-2 linux-hwe, linux-gcp, linux-oem vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:3410-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0213-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13704-1 kernel-devel-longterm-6.6.17-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0115-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:3398-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0040-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0031-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0180-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0011-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10728-1 kernel-devel-5.14.6-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2019-4316 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 4, 2019
References
- 102110 vdb-entry
- USN-3617-1 vendor-advisory
- USN-3619-2 vendor-advisory
- DSA-4082 vendor-advisory
- USN-3617-3 vendor-advisory
- https://lkml.org/lkml/2017/12/5/982
- USN-3583-2 vendor-advisory
- SUSE-SU-2018:0011 vendor-advisory
- USN-3632-1 vendor-advisory
- USN-3583-1 vendor-advisory
- DSA-4073 vendor-advisory
- USN-3617-2 vendor-advisory
- USN-3619-1 vendor-advisory