Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check The same… (CVE-2026-23447)
In the Linux kernel, the following vulnerability has been resolved: net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check The same bounds-check bug fixed for NDP16 in the previous patch also exists in cdc_ncm_rx_verify_ndp32(). The DPE array size is validated against the total skb length without accounting for ndpoffset, allowing out-of-bounds reads when the NDP32 is placed near the end of the NTB. Add ndpoffset to the nframes bounds check and use struct_size_t() to express the NDP-plus-DPE-array size more clearly. Compile-tested only.
AI Analysis
Technical Summary
The Linux kernel's usb cdc_ncm driver had a bounds-check bug in the function cdc_ncm_rx_verify_ndp32, where the DPE array size was validated against the total skb length without considering the ndpoffset. This allowed out-of-bounds reads when the NDP32 structure was near the end of the NTB. The fix involved adding ndpoffset to the nframes bounds check and using struct_size_t() for clearer size expression. This vulnerability was resolved in linux-hwe-edge kernel versions 6.8.0-1061.64~22.04.1 and later. The CVSS score is 7.8, indicating a high impact on confidentiality, integrity, and availability, but the attack vector requires local access with low privileges and no user interaction.
Potential Impact
Successful exploitation could lead to out-of-bounds reads in kernel memory, potentially exposing sensitive information or causing system instability. The CVSS 3.1 score of 7.8 reflects high impact on confidentiality, integrity, and availability. The attack requires local access with low privileges and no user interaction, limiting remote exploitation but still posing a significant risk on affected systems.
Mitigation Recommendations
A patch is available and should be applied by updating the linux-hwe-edge kernel to version 6.8.0-1061.64~22.04.1 or later. After updating, a system reboot is required to apply the fix. Due to an ABI change in the kernel update, recompilation and reinstallation of any third-party kernel modules may be necessary. Follow the vendor's update instructions carefully to ensure full remediation.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check The same… (CVE-2026-23447)
Description
In the Linux kernel, the following vulnerability has been resolved: net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check The same bounds-check bug fixed for NDP16 in the previous patch also exists in cdc_ncm_rx_verify_ndp32(). The DPE array size is validated against the total skb length without accounting for ndpoffset, allowing out-of-bounds reads when the NDP32 is placed near the end of the NTB. Add ndpoffset to the nframes bounds check and use struct_size_t() to express the NDP-plus-DPE-array size more clearly. Compile-tested only.
CVSS v3.1
Score 7.8high
Affected software
pkg:deb/ubuntu/[email protected]~16.04.1?arch=source&distro=xenialpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]~18.04.2?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]~18.04.2?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email 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protected]+fips1?arch=source&distro=fips-updates/noblepkg:deb/ubuntu/[email protected]+fips1?arch=source&distro=fips-updates/noblepkg:deb/ubuntu/[email protected]?arch=source&distro=realtime/noblepkg:deb/ubuntu/[email protected]?arch=source&distro=realtime/noblepkg:deb/ubuntu/[email protected]~24.04.1?arch=source&distro=realtime/noblepkg:deb/ubuntu/[email protected]~24.04.1?arch=source&distro=realtime/noblepkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel's usb cdc_ncm driver had a bounds-check bug in the function cdc_ncm_rx_verify_ndp32, where the DPE array size was validated against the total skb length without considering the ndpoffset. This allowed out-of-bounds reads when the NDP32 structure was near the end of the NTB. The fix involved adding ndpoffset to the nframes bounds check and using struct_size_t() for clearer size expression. This vulnerability was resolved in linux-hwe-edge kernel versions 6.8.0-1061.64~22.04.1 and later. The CVSS score is 7.8, indicating a high impact on confidentiality, integrity, and availability, but the attack vector requires local access with low privileges and no user interaction.
Potential Impact
Successful exploitation could lead to out-of-bounds reads in kernel memory, potentially exposing sensitive information or causing system instability. The CVSS 3.1 score of 7.8 reflects high impact on confidentiality, integrity, and availability. The attack requires local access with low privileges and no user interaction, limiting remote exploitation but still posing a significant risk on affected systems.
Mitigation Recommendations
A patch is available and should be applied by updating the linux-hwe-edge kernel to version 6.8.0-1061.64~22.04.1 or later. After updating, a system reboot is required to apply the fix. Due to an ABI change in the kernel update, recompilation and reinstallation of any third-party kernel modules may be necessary. Follow the vendor's update instructions carefully to ensure full remediation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-23447
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro:FIPS-updates:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Nvidia-BlueField:22.04:LTS","Ubuntu:Pro:FIPS-preview:22.04:LTS","Ubuntu:Pro:FIPS-updates:22.04:LTS","Ubuntu:Pro:Realtime:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Nvidia-BlueField:24.04:LTS","Ubuntu:Pro:FIPS-updates:24.04:LTS","Ubuntu:Pro:Realtime:24.04:LTS","Ubuntu:25.10"]
- Cvss Version
- 4.0
Threat ID: 6a5b62822d1edb114c88e78d
Added to database: 07/18/2026, 11:24:50 UTC
Last enriched: 08/01/2026, 06:08:10 UTC
Last updated: 09/14/2026, 22:01:32 UTC
Views: 18
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