Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: validate payload size in ipc response
If installing malicious ksmbd-tools, ksmbd.mountd can return invalid ipc
response to ksmbd kernel server. ksmbd should validate payload size of
ipc response from ksmbd.mountd to avoid memory overrun or
slab-out-of-bounds. This patch validate 3 ipc response that has payload.
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 | 6.1.85-1 | DSA-5658-1 |
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 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | kernel | 6.6.82.1-1 | — |
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.176.3-3 | — |
Advisories 14
- 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
- DSA-5658-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2024-0814 Linux Kernel: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Jul 30, 2024
References
- https://git.kernel.org/stable/c/88b7f1143b15b29cccb8392b4f38e75b7bb3e300
- https://git.kernel.org/stable/c/51a6c2af9d20203ddeeaf73314ba8854b38d01bd
- https://git.kernel.org/stable/c/a637fabac554270a851033f5ab402ecb90bc479c
- https://git.kernel.org/stable/c/76af689a45aa44714b46d1a7de4ffdf851ded896
- https://git.kernel.org/stable/c/a677ebd8ca2f2632ccdecbad7b87641274e15aac