Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: validate command request size
In commit 2b9b8f3b68ed ("ksmbd: validate command payload size"), except
for SMB2_OPLOCK_BREAK_HE command, the request size of other commands
is not checked, it's not expected. Fix it by add check for request
size of other commands.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 5.15.121 – < 5.15.127, 6.1.36 – < 6.1.46, 6.3.10 – < 6.4, 6.4 | 5.15.127 |
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 | 6.4.11-1 | — |
| Debian 13 | linux | 6.4.11-1 | — |
| Debian 12 | linux | 6.1.52-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1033.35 | — |
| Ubuntu 24.04 LTS | linux-intel +8 | No fix yet | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-91.101 | — |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1051.56 | — |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1053.61 | — |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1053.61.1 | — |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1048.56 | — |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1048.53 | — |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1034.40 | — |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1044.47 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1046.52 | — |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1042.42 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1020.20 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1007.7 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1049.55 | — |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1027.31 | — |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1051.56~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1053.61~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1048.56~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-91.101~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1044.47~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1046.52~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1020.20~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1049.55~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1047.51~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 2 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 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1044.46 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1052.58 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | kernel-64kb +6 | 6.4.0-150700.53.16.1 | SUSE-SU-2025:03290-1 |
| SLES 15 SP7 | kernel-azure +1 | 6.4.0-150700.20.15.2 | SUSE-SU-2025:03633-1 |
| SLES 15 SP7 | kernel-default-base | 6.4.0-150700.53.16.1.150700.17.11.2 | SUSE-SU-2025:03290-1 |
| SLES 15 SP7 | kernel-syms-azure | 6.4.0-150700.20.15.1 | SUSE-SU-2025:03633-1 |
| SLES 15 SP6 | kernel-64kb +6 | 6.4.0-150600.23.70.1 | SUSE-SU-2025:03301-1 |
| SLES 15 SP6 | kernel-azure +2 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 |
| SLES 15 SP6 | kernel-coco +3 | 6.4.0-15061.32.coco15sp6.1 | SUSE-SU-2025:03602-1 |
| SLES 15 SP6 | kernel-default-base | 6.4.0-150600.23.70.1.150600.12.30.2 | SUSE-SU-2025:03301-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.1 | kernel-default-base | 6.4.0-34.1.21.11 | SUSE-SU-2025:20669-1 |
| SLE Micro 6.1 | kernel-rt +1 | 6.4.0-36.1 | SUSE-SU-2025:20756-1 |
| SLE Micro 6.1 | kernel-source +2 | 6.4.0-34.1 | SUSE-SU-2025:20669-1 |
| SLE Micro 6.0 | kernel-default-base | 6.4.0-34.1.21.11 | SUSE-SU-2025:20653-1 |
| SLE Micro 6.0 | kernel-rt +1 | 6.4.0-36.1 | SUSE-SU-2025:20739-1 |
| SLE Micro 6.0 | kernel-source +2 | 6.4.0-34.1 | SUSE-SU-2025:20653-1 |
| SLE Live Patching 15 SP7 | kernel-default | 6.4.0-150700.53.16.1 | SUSE-SU-2025:03290-1 |
| SLE Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7-RT_Update_4 | 1-150700.1.3.2 | SUSE-SU-2025:03382-1 |
| SLE Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_4 | 1-150700.15.3.2 | SUSE-SU-2025:03290-1 |
| SLE Live Patching 15 SP6 | kernel-default | 6.4.0-150600.23.70.1 | SUSE-SU-2025:03301-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_15 | 1-150600.1.3.1 | SUSE-SU-2025:03272-1 |
| SLE Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_15 | 1-150600.13.3.2 | SUSE-SU-2025:03301-1 |
| SUSE Real Time Module 15 SP7 | kernel-rt +2 | 6.4.0-150700.7.16.1 | SUSE-SU-2025:03382-1 |
| SUSE Real Time Module 15 SP6 | kernel-rt +3 | 6.4.0-150600.10.52.1 | SUSE-SU-2025:03272-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | dtb-aarch64 +10 | 6.4.0-150600.23.70.1 | SUSE-SU-2025:03301-1 |
| openSUSE Leap 15.6 | kernel-azure +2 | 6.4.0-150600.8.52.1 | SUSE-SU-2025:03634-1 |
| openSUSE Leap 15.6 | kernel-default-base | 6.4.0-150600.23.70.1.150600.12.30.2 | SUSE-SU-2025:03301-1 |
| openSUSE Leap 15.6 | kernel-rt +3 | 6.4.0-150600.10.52.1 | SUSE-SU-2025:03272-1 |
Advisories 12
- WID-SEC-2025-1858 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- SUSE-SU-2025:03634-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03272-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20669-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03602-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03382-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20739-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20756-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03633-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03290-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20653-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03301-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026