Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: add bounds check for if_id in IRQ handler The IRQ handler extracts… (CVE-2026-23180)
A vulnerability in the Linux kernel's dpaa2-switch IRQ handler allowed an out-of-bounds read due to missing bounds checking on the if_id index extracted from hardware status. This issue was resolved by adding proper validation before accessing the ports array. The vulnerability affects certain linux-hwe-edge kernel versions prior to specific 5.15.x releases. The flaw has a CVSS score of 7.0, indicating a medium severity with high impact on confidentiality, integrity, and availability. A patch is available and included in updated kernel packages. Users should update and reboot to apply the fix.
AI Analysis
Technical Summary
The Linux kernel dpaa2-switch IRQ handler extracted an if_id value from the upper 16 bits of a hardware status register and used it to index into the ethsw->ports[] array without validating that if_id was within the allocated range. Since if_id can be any 16-bit value (0-65535) but the ports array size is limited by sw_attr.num_ifs, this could lead to an out-of-bounds read. The vulnerability was fixed by adding a bounds check consistent with existing validation in dpaa2_switch_rx(). This issue affects linux-hwe-edge kernel versions prior to 5.15.0-1111.118~20.04.1, 5.15.0-1116.125~20.04.1, 5.15.0-1111.121~20.04.1, and 5.15.0-185.195~20.04.1. The CVSS 3.1 vector is AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H with a score of 7.0, indicating a medium severity vulnerability with local attack vector requiring low privileges and high impact on confidentiality, integrity, and availability. The vendor advisory from Ubuntu confirms a patch is available and advises updating to fixed kernel versions and rebooting the system.
Potential Impact
An attacker with local access and low privileges could exploit this vulnerability to cause an out-of-bounds read in kernel memory, potentially leading to information disclosure, system instability, or denial of service. The CVSS score of 7.0 reflects high impact on confidentiality, integrity, and availability. However, exploitation requires local access and higher attack complexity due to the need for specific conditions and privileges.
Mitigation Recommendations
A patch is available from the vendor. Users should update their linux-hwe-edge kernel packages to versions 5.15.0-1111.118~20.04.1 or later, 5.15.0-1116.125~20.04.1 or later, 5.15.0-1111.121~20.04.1 or later, or 5.15.0-185.195~20.04.1 or later as applicable. After updating, a system reboot is required to apply the kernel fixes. No additional mitigations are specified by the vendor advisory.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: add bounds check for if_id in IRQ handler The IRQ handler extracts… (CVE-2026-23180)
Description
A vulnerability in the Linux kernel's dpaa2-switch IRQ handler allowed an out-of-bounds read due to missing bounds checking on the if_id index extracted from hardware status. This issue was resolved by adding proper validation before accessing the ports array. The vulnerability affects certain linux-hwe-edge kernel versions prior to specific 5.15.x releases. The flaw has a CVSS score of 7.0, indicating a medium severity with high impact on confidentiality, integrity, and availability. A patch is available and included in updated kernel packages. Users should update and reboot to apply the fix.
CVSS v3.1
Score 7.0high
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]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=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]?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]~18.04.2?arch=source&distro=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]~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 protected]~20.04.2?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 protected]+cvm1.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.3?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]?arch=source&distro=focalpkg:deb/ubuntu/[email protected]?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]?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=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 protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]?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=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]?arch=source&distro=focalpkg:deb/ubuntu/[email 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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? 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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel dpaa2-switch IRQ handler extracted an if_id value from the upper 16 bits of a hardware status register and used it to index into the ethsw->ports[] array without validating that if_id was within the allocated range. Since if_id can be any 16-bit value (0-65535) but the ports array size is limited by sw_attr.num_ifs, this could lead to an out-of-bounds read. The vulnerability was fixed by adding a bounds check consistent with existing validation in dpaa2_switch_rx(). This issue affects linux-hwe-edge kernel versions prior to 5.15.0-1111.118~20.04.1, 5.15.0-1116.125~20.04.1, 5.15.0-1111.121~20.04.1, and 5.15.0-185.195~20.04.1. The CVSS 3.1 vector is AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H with a score of 7.0, indicating a medium severity vulnerability with local attack vector requiring low privileges and high impact on confidentiality, integrity, and availability. The vendor advisory from Ubuntu confirms a patch is available and advises updating to fixed kernel versions and rebooting the system.
Potential Impact
An attacker with local access and low privileges could exploit this vulnerability to cause an out-of-bounds read in kernel memory, potentially leading to information disclosure, system instability, or denial of service. The CVSS score of 7.0 reflects high impact on confidentiality, integrity, and availability. However, exploitation requires local access and higher attack complexity due to the need for specific conditions and privileges.
Mitigation Recommendations
A patch is available from the vendor. Users should update their linux-hwe-edge kernel packages to versions 5.15.0-1111.118~20.04.1 or later, 5.15.0-1116.125~20.04.1 or later, 5.15.0-1111.121~20.04.1 or later, or 5.15.0-185.195~20.04.1 or later as applicable. After updating, a system reboot is required to apply the kernel fixes. No additional mitigations are specified by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-23180
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro: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
- 3.1
Threat ID: 6a58b4ea68715ace43dafbb6
Added to database: 07/16/2026, 10:39:38 UTC
Last enriched: 08/01/2026, 07:20:18 UTC
Last updated: 09/10/2026, 19:24:58 UTC
Views: 23
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