Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix potencial out-of-bounds when buffer offset is invalid
I found potencial out-of-bounds when buffer offset fields of a few requests
is invalid. This patch set the minimum value of buffer offset field to
->Buffer offset to validate buffer length.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 5.15 | 5.15.181 |
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 | 6.7.12-1 | — |
| Debian 13 | linux | 6.7.12-1 | — |
| Debian 12 | linux | 6.1.119-1 | DSA-5818-1 |
| Debian 11 | linux-6.1 | 6.1.119-1~deb11u1 | DLA-4008-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1048.50 | — |
| Ubuntu 24.04 LTS | linux | 6.8.0-35.35 | USN-6816-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1009.9 | USN-6817-1 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1008.8 | USN-6817-3 |
| Ubuntu 24.04 LTS | linux-gcp | 6.8.0-1008.9 | USN-6817-1 |
| Ubuntu 24.04 LTS | linux-gke | 6.8.0-1004.7 | USN-6817-3 |
| Ubuntu 24.04 LTS | linux-ibm +2 | 6.8.0-1006.6 | USN-6878-1, USN-6817-2, USN-6816-1 |
| Ubuntu 24.04 LTS | linux-raspi | 6.8.0-1005.5 | USN-6816-1 |
| Ubuntu 24.04 LTS | linux-riscv +1 | 6.8.0-35.35.1 | USN-6816-1 |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-117.127 | USN-6923-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1066.72 | USN-6923-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1070.79 | USN-6956-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1070.79.1 | USN-6956-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1065.73 | USN-6923-1 |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1063.69 | USN-6923-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1049.56 | USN-6923-1 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1059.62 | USN-6923-2 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1061.67 | USN-6923-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1063.68 | USN-6923-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1061.62 | USN-6923-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1027.27 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1015.15 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1064.70 | USN-6923-1 |
| 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 | 5.15.0-1066.72~20.04.1 | USN-6923-2 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1070.79~20.04.1 | USN-6956-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1070.79~20.04.1.1 | USN-6956-1 |
| 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 | 5.15.0-1049.56~20.04.1 | USN-6923-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-117.127~20.04.1 | USN-6923-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1059.62~20.04.1 | USN-6923-2 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1061.67~20.04.1 | USN-6923-1 |
| 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 | 5.15.0-1065.71~20.04.1 | USN-6957-1 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1062.66~20.04.1 | — |
| 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 | 6.8.0-2004.4 | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1002.2 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1059.61 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1067.75 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-aws-fips | 5.15.0-1066.72+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1070.79+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-117.127+fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1065.73+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 | 6.6.35.1-4 | — |
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.158.2-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | bpftool +18 | 5.15.0-310.184.5.2.el9uek | ELSA-2025-20470 |
Advisories 15
- USN-6878-1 linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6816-1 linux, linux-ibm, linux-lowlatency, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6817-3 linux-azure, linux-gke vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6817-1 linux-aws, linux-gcp vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-6817-2 linux-oem-6.8 vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- USN-7019-1 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-6927-1 linux-gcp-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- USN-6956-1 linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6923-1 linux, linux-aws, linux-gcp, linux-gke, linux-gkeop, linux-gkeop-5.15, linux-hwe-5.15, linux-intel-iotg, linux-intel-iotg-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6957-1 linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6923-2 linux-aws-5.15, linux-ibm, linux-ibm-5.15, linux-raspi 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
- DLA-4008-1 linux-6.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5818-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ELSA-2025-20470 Important: Unbreakable Enterprise kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 14, 2025
References
- https://git.kernel.org/stable/c/480469f145e5abf83361e608734e421b7d99693d
- https://git.kernel.org/stable/c/ad6480c9a5d884e2704adc51d69895d93339176c
- https://git.kernel.org/stable/c/39bdc4197acf2ed13269167ccf093ee28cfa2a4e
- https://git.kernel.org/stable/c/2dcda336b6e80b72d58d30d40f2fad9724e5fe63
- https://git.kernel.org/stable/c/0c5541b4c980626fa3cab16ba1a451757778bbb5
- https://git.kernel.org/stable/c/c6cd2e8d2d9aa7ee35b1fa6a668e32a22a9753da