🛡️ CVE-2023-32249 on Ubuntu — linux
Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: not allow guest user on multichannel This patch return STATUS_NOT_SUPPORTED if binding session is guest.
Distribution advisory
This page covers CVE-2023-32249 as tracked by Ubuntu, for the package linux. The fix is available in version 5.15.0-83.92; earlier versions remain affected.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.
Affected software and timeline
Affected software: linux (fixed in 5.15.0-83.92), linux-allwinner-5.19, linux-aws (fixed in 5.15.0-1044.49), linux-aws-5.0, linux-aws-5.11, linux-aws-5.13, linux-aws-5.15 (fixed in 5.15.0-1044.49~20.04.1), linux-aws-5.19, linux-aws-5.3, linux-aws-5.4, linux-aws-5.8, linux-aws-6.2, linux-aws-6.5, linux-aws-fips, linux-aws-hwe, linux-azure (fixed in 5.15.0-1046.53), linux-azure-4.15, linux-azure-5.11, linux-azure-5.13, linux-azure-5.15 (fixed in 5.15.0-1046.53~20.04.1), linux-azure-5.19, linux-azure-5.3, linux-azure-5.4, linux-azure-5.8, linux-azure-6.11, linux-azure-6.2, linux-azure-6.5, linux-azure-edge, linux-azure-fde, linux-azure-fde-5.15 (fixed in 5.15.0-1114.123~20.04.1), linux-azure-fde-5.19, linux-azure-fde-6.2, linux-azure-fips, linux-bluefield, linux-fips, linux-gcp (fixed in 5.15.0-1041.49), linux-gcp-4.15, linux-gcp-5.11, linux-gcp-5.13, linux-gcp-5.15 (fixed in 5.15.0-1041.49~20.04.1), linux-gcp-5.19, linux-gcp-5.3, linux-gcp-5.4, linux-gcp-5.8, linux-gcp-6.11, linux-gcp-6.2, linux-gcp-6.5, linux-gcp-fips, linux-gke (fixed in 5.15.0-1041.46), linux-gke-4.15, linux-gke-5.15, linux-gke-5.4, linux-gkeop (fixed in 5.15.0-1027.32), linux-gkeop-5.15, linux-gkeop-5.4, linux-hwe, linux-hwe-5.11, linux-hwe-5.13, linux-hwe-5.15 (fixed in 5.15.0-83.92~20.04.1), linux-hwe-5.19, linux-hwe-5.4, linux-hwe-5.8, linux-hwe-6.11, linux-hwe-6.2, linux-hwe-6.5, linux-hwe-edge, linux-ibm (fixed in 5.15.0-1037.40), linux-ibm-5.15 (fixed in 5.15.0-1037.40~20.04.1), linux-ibm-5.4, linux-intel, linux-intel-5.13, linux-intel-iot-realtime (fixed in 5.15.0-1038.40), linux-intel-iotg (fixed in 5.15.0-1039.45), linux-intel-iotg-5.15 (fixed in 5.15.0-1040.46~20.04.1), linux-iot, linux-kvm (fixed in 5.15.0-1041.46), linux-lowlatency (fixed in 5.15.0-83.92), linux-lowlatency-hwe-5.15 (fixed in 5.15.0-83.92~20.04.1), linux-lowlatency-hwe-5.19, linux-lowlatency-hwe-6.11, linux-lowlatency-hwe-6.2, linux-lowlatency-hwe-6.5, linux-lts-xenial, linux-nvidia (fixed in 5.15.0-1032.32), linux-nvidia-6.2, linux-nvidia-6.5, linux-nvidia-tegra (fixed in 5.15.0-1017.17), linux-nvidia-tegra-5.15 (fixed in 5.15.0-1017.17~20.04.1), linux-nvidia-tegra-igx (fixed in 5.15.0-1004.4), linux-oem, linux-oem-5.10, linux-oem-5.13, linux-oem-5.14, linux-oem-5.17, linux-oem-5.6, linux-oem-6.0, linux-oem-6.1, linux-oem-6.5, linux-oem-6.8, linux-oracle (fixed in 5.15.0-1042.48), linux-oracle-5.0, linux-oracle-5.11, linux-oracle-5.13, linux-oracle-5.15 (fixed in 5.15.0-1042.48~20.04.1), linux-oracle-5.3, linux-oracle-5.4, linux-oracle-5.8, linux-oracle-6.5, linux-raspi (fixed in 5.15.0-1037.40), linux-raspi-5.4, linux-raspi-realtime, linux-raspi2, linux-realtime, linux-riscv, linux-riscv-5.11, linux-riscv-5.15 (fixed in 5.15.0-1040.44~20.04.3), linux-riscv-5.19, linux-riscv-5.8, linux-riscv-6.5, linux-starfive-5.19, linux-starfive-6.2, linux-starfive-6.5 and linux-xilinx-zynqmp (fixed in 5.15.0-1025.29). Published on 16 August 2025 and last revised on 11 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
ubuntu.com (Report)
www.cve.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
CVE-2023-32249 on other distributions
Each distribution ships its own build and its own fixed version. Pick the one you run:
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 5.15.0-83.92 |
| linux-allwinner-5.19 | — | — |
| linux-aws | — | 5.15.0-1044.49 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.15 | — | 5.15.0-1044.49~20.04.1 |
| linux-aws-5.19 | — | — |
| linux-aws-5.3 | — | — |
| linux-aws-5.4 | — | — |
| linux-aws-5.8 | — | — |
| linux-aws-6.2 | — | — |
| linux-aws-6.5 | — | — |
| linux-aws-fips | — | — |
| linux-aws-hwe | — | — |
| linux-azure | — | 5.15.0-1046.53 |
| linux-azure-4.15 | — | — |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.15 | — | 5.15.0-1046.53~20.04.1 |
| linux-azure-5.19 | — | — |
| linux-azure-5.3 | — | — |
| linux-azure-5.4 | — | — |
| linux-azure-5.8 | — | — |
| linux-azure-6.11 | — | — |
| linux-azure-6.2 | — | — |
| linux-azure-6.5 | — | — |
| linux-azure-edge | — | — |
| linux-azure-fde | — | — |
| linux-azure-fde-5.15 | — | 5.15.0-1114.123~20.04.1 |
| linux-azure-fde-5.19 | — | — |
| linux-azure-fde-6.2 | — | — |
| linux-azure-fips | — | — |
| linux-bluefield | — | — |
| linux-fips | — | — |
| linux-gcp | — | 5.15.0-1041.49 |
| linux-gcp-4.15 | — | — |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.15 | — | 5.15.0-1041.49~20.04.1 |
| linux-gcp-5.19 | — | — |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.4 | — | — |
| linux-gcp-5.8 | — | — |
| linux-gcp-6.11 | — | — |
| linux-gcp-6.2 | — | — |
| linux-gcp-6.5 | — | — |
| linux-gcp-fips | — | — |
| linux-gke | — | 5.15.0-1041.46 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | — |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 5.15.0-1027.32 |
| linux-gkeop-5.15 | — | — |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.15 | — | 5.15.0-83.92~20.04.1 |
| linux-hwe-5.19 | — | — |
| linux-hwe-5.4 | — | — |
| linux-hwe-5.8 | — | — |
| linux-hwe-6.11 | — | — |
| linux-hwe-6.2 | — | — |
| linux-hwe-6.5 | — | — |
| linux-hwe-edge | — | — |
| linux-ibm | — | 5.15.0-1037.40 |
| linux-ibm-5.15 | — | 5.15.0-1037.40~20.04.1 |
| linux-ibm-5.4 | — | — |
| linux-intel | — | — |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | 5.15.0-1038.40 |
| linux-intel-iotg | — | 5.15.0-1039.45 |
| linux-intel-iotg-5.15 | — | 5.15.0-1040.46~20.04.1 |
| linux-iot | — | — |
| linux-kvm | — | 5.15.0-1041.46 |
| linux-lowlatency | — | 5.15.0-83.92 |
| linux-lowlatency-hwe-5.15 | — | 5.15.0-83.92~20.04.1 |
| linux-lowlatency-hwe-5.19 | — | — |
| linux-lowlatency-hwe-6.11 | — | — |
| linux-lowlatency-hwe-6.2 | — | — |
| linux-lowlatency-hwe-6.5 | — | — |
| linux-lts-xenial | — | — |
| linux-nvidia | — | 5.15.0-1032.32 |
| linux-nvidia-6.2 | — | — |
| linux-nvidia-6.5 | — | — |
| linux-nvidia-tegra | — | 5.15.0-1017.17 |
| linux-nvidia-tegra-5.15 | — | 5.15.0-1017.17~20.04.1 |
| linux-nvidia-tegra-igx | — | 5.15.0-1004.4 |
| linux-oem | — | — |
| linux-oem-5.10 | — | — |
| linux-oem-5.13 | — | — |
| linux-oem-5.14 | — | — |
| linux-oem-5.17 | — | — |
| linux-oem-5.6 | — | — |
| linux-oem-6.0 | — | — |
| linux-oem-6.1 | — | — |
| linux-oem-6.5 | — | — |
| linux-oem-6.8 | — | — |
| linux-oracle | — | 5.15.0-1042.48 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.15 | — | 5.15.0-1042.48~20.04.1 |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.4 | — | — |
| linux-oracle-5.8 | — | — |
| linux-oracle-6.5 | — | — |
| linux-raspi | — | 5.15.0-1037.40 |
| linux-raspi-5.4 | — | — |
| linux-raspi-realtime | — | — |
| linux-raspi2 | — | — |
| linux-realtime | — | — |
| linux-riscv | — | — |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.15 | — | 5.15.0-1040.44~20.04.3 |
| linux-riscv-5.19 | — | — |
| linux-riscv-5.8 | — | — |
| linux-riscv-6.5 | — | — |
| linux-starfive-5.19 | — | — |
| linux-starfive-6.2 | — | — |
| linux-starfive-6.5 | — | — |
| linux-xilinx-zynqmp | — | 5.15.0-1025.29 |
References
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Exploit Protection
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