Description
In the Linux kernel, the following vulnerability has been resolved:
rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()
While looking at one unrelated syzbot bug, I found the replay logic
in __rtnl_newlink() to potentially trigger use-after-free.
It is better to clear master_dev and m_ops inside the loop,
in case we have to replay it.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 3.14 | 4.9.300 |
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 | 5.16.7-1 | — |
| Debian 13 | linux | 5.16.7-1 | — |
| Debian 12 | linux | 5.16.7-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +22 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-109.123 | — |
| Ubuntu 20.04 LTS | linux-aws +1 | 5.4.0-1072.77 | — |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1077.80 | — |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1035.38 | — |
| Ubuntu 20.04 LTS | linux-gke +26 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1039.40 | — |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1020.22 | — |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1008.11~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1004.6 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1062.65 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1070.76 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1059.67 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-176.185 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1127.136 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 +1 | 5.4.0-1072.77~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1137.150 | — |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1077.80~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1121.135 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-109.123~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-ibm-5.4 | 5.4.0-1020.22~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1113.116 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1092.101 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1070.76~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1059.66~18.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1072.77+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1076.79+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1048.54 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1071.75+fips1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2066.69 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2048.52 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1084.93 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2031.34 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro 16.04 LTS | linux +2 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1127.136~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1137.150~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1121.135~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-176.185~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1092.101~16.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux-aws +1 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1137.150~14.04.1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | kernel-64kb +6 | 5.14.21-150500.55.91.1 | SUSE-SU-2025:0201-2, SUSE-SU-2025:0201-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.91.1.150500.6.41.1 | SUSE-SU-2025:0201-2, SUSE-SU-2025:0201-1 |
| SLES 12 SP5 | kernel-syms +2 | 4.12.14-122.244.1 | SUSE-SU-2025:0236-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | kernel-default-base | 5.14.21-150500.55.91.1.150500.6.41.1 | SUSE-SU-2025:0201-2, SUSE-SU-2025:0201-1 |
| SLES for SAP 15 SP5 | kernel-docs +4 | 5.14.21-150500.55.91.1 | SUSE-SU-2025:0201-2, SUSE-SU-2025:0201-1 |
| SLE Micro 5.5 | kernel-default | 5.14.21-150500.55.91.1 | SUSE-SU-2025:0201-1 |
| SLE Micro 5.5 | kernel-default-base | 5.14.21-150500.55.91.1.150500.6.41.1 | SUSE-SU-2025:0201-1 |
| SLE Micro 5.5 | kernel-rt +1 | 5.14.21-150500.13.82.1 | SUSE-SU-2025:0229-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.91.1 | SUSE-SU-2025:0201-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_22 | 1-150500.11.3.1 | SUSE-SU-2025:0201-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.244.1 | SUSE-SU-2025:0236-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_64 | 1-8.5.1 | SUSE-SU-2025:0236-1 |
| SLE HPC 15 SP5 | kernel-64kb +5 | 5.14.21-150500.55.91.1 | SUSE-SU-2025:0201-2, SUSE-SU-2025:0201-1 |
| SLE HPC 15 SP5 | kernel-default-base | 5.14.21-150500.55.91.1.150500.6.41.1 | SUSE-SU-2025:0201-2, SUSE-SU-2025:0201-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.268-205.500 | 1.0-0.amzn2 | ALAS2-2022-1761 |
| Amazon Linux 2 | perf +8 | 4.14.268-205.500.amzn2 | ALAS2-2022-1761 |
Advisories 6
- WID-SEC-2024-1422 Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Oct 29, 2026
- SUSE-SU-2025:0201-2 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0236-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0229-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2022-1761 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 2, 2025
- SUSE-SU-2025:0201-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Apr 4, 2025
References
- https://git.kernel.org/stable/c/2cf180360d66bd657e606c1217e0e668e6faa303
- https://git.kernel.org/stable/c/7d9211678c0f0624f74cdff36117ab8316697bb8
- https://git.kernel.org/stable/c/a01e60a1ec6bef9be471fb7182a33c6d6f124e93
- https://git.kernel.org/stable/c/bd43771ee9759dd9dfae946bff190e2c5a120de5
- https://git.kernel.org/stable/c/3bbe2019dd12b8d13671ee6cda055d49637b4c39
- https://git.kernel.org/stable/c/def5e7070079b2a214b3b1a2fbec623e6fbfe34a
- https://git.kernel.org/stable/c/36a9a0aee881940476b254e0352581401b23f210
- https://git.kernel.org/stable/c/c6f6f2444bdbe0079e41914a35081530d0409963