Description
In the Linux kernel, the following vulnerability has been resolved:
s390/cio: fix race condition during online processing
A race condition exists in ccw_device_set_online() that can cause the
online process to fail, leaving the affected device in an inconsistent
state. As a result, subsequent attempts to set that device online fail
with return code ENODEV.
The problem occurs when a path verification request arrives after
a wait for final device state completed, but before the result state
is evaluated.
Fix this by ensuring that the CCW-device lock is held between
determining final state and checking result state.
Note that since:
commit 2297791c92d0 ("s390/cio: dont unregister subchannel from child-drivers")
path verification requests are much more likely to occur during boot,
resulting in an increased chance of this race condition occurring.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 5.15 | 5.15.157 |
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 | 6.8.9-1 | — |
| Debian 13 | linux | 6.8.9-1 | — |
| Debian 12 | linux | 6.1.90-1 | DSA-5680-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1047.49 | — |
| Ubuntu 24.04 LTS | linux | 6.8.0-38.38 | USN-6893-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1011.12 | USN-6893-3 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1010.10 | USN-6893-1 |
| Ubuntu 24.04 LTS | linux-gcp | 6.8.0-1010.11 | USN-6893-1 |
| Ubuntu 24.04 LTS | linux-gke | 6.8.0-1006.9 | USN-6893-2 |
| Ubuntu 24.04 LTS | linux-ibm +2 | 6.8.0-1008.8 | USN-6918-1, USN-6893-1 |
| Ubuntu 24.04 LTS | linux-intel | 6.8.0-1007.14 | USN-6893-1 |
| Ubuntu 24.04 LTS | linux-nvidia | 6.8.0-1009.9 | USN-6893-2 |
| Ubuntu 24.04 LTS | linux-raspi | 6.8.0-1007.7 | USN-6893-1 |
| Ubuntu 24.04 LTS | linux-riscv +1 | 6.8.0-38.38.1 | USN-6893-1 |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-116.126 | USN-6898-2, USN-6898-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1065.71 | USN-6898-3 |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1011.12~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1068.77 | USN-6917-1 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1010.10~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1068.77.1 | USN-6917-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1064.72 | USN-6898-1 |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1062.68 | USN-6898-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1048.55 | USN-6898-1 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1058.61 | USN-6919-1, USN-6898-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1060.66 | USN-6898-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1062.67 | USN-6898-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1060.61 | USN-6898-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.8 | 6.8.0-1009.9~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1026.26 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1015.15 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1063.69 | USN-6898-1 |
| Ubuntu 22.04 LTS | linux-oracle-6.8 | 6.8.0-1008.8~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-riscv +31 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1035.39 | USN-7019-1 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1065.71~20.04.1 | USN-6898-4 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1068.77~20.04.1 | USN-6917-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1068.77~20.04.1.1 | USN-6917-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1065.73~20.04.1 | USN-6927-1 |
| Ubuntu 20.04 LTS | linux-gke +26 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1048.55~20.04.1 | USN-6898-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-116.126~20.04.1 | USN-6898-3, USN-6898-2 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1058.61~20.04.1 | USN-6898-2 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1060.66~20.04.1 | USN-6898-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1027.27~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1063.69~20.04.1 | USN-6898-2 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1061.65~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-raspi-realtime | 6.8.0-2006.6 | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1004.4 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1058.60 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1066.74 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-aws-fips | 5.15.0-1065.71+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1068.77+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-115.125+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1064.72+fips1 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips +3 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.0 | kernel-default-base | 6.4.0-17.1.1.51 | SUSE-SU-2025:20008-1 |
| SLE Micro 6.0 | kernel-rt +1 | 6.4.0-9.1 | SUSE-SU-2025:20028-1 |
| SLE Micro 6.0 | kernel-source +2 | 6.4.0-18.1 | SUSE-SU-2025:20008-1 |
Advisories 16
- USN-6919-1 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-7019-1 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-6917-1 linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-6927-1 linux-gcp-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-6898-1 linux, linux-gcp, linux-gke, linux-gkeop, linux-gkeop-5.15, linux-ibm, linux-intel-iotg, linux-intel-iotg-5.15, linux-kvm, linux-nvidia, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6893-1 linux, linux-azure, linux-gcp, linux-ibm, linux-intel, linux-lowlatency, linux-oem-6.8, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6898-2 linux-ibm-5.15, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6898-3 linux-aws, linux-hwe-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6898-4 linux-aws-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6893-2 linux-gke, linux-nvidia vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6893-3 linux-aws vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6918-1 linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- WID-SEC-2024-1008 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Oct 12, 2026
- SUSE-SU-2025:20008-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20028-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- DSA-5680-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://git.kernel.org/stable/c/3076b3c38a704e10df5e143c213653309d532538
- https://git.kernel.org/stable/c/559f3a6333397ab6cd4a696edd65a70b6be62c6e
- https://git.kernel.org/stable/c/2df56f4ea769ff81e51bbb05699989603bde9c49
- https://git.kernel.org/stable/c/a4234decd0fe429832ca81c4637be7248b88b49e
- https://git.kernel.org/stable/c/2d8527f2f911fab84aec04df4788c0c23af3df48