CVE-2026-23180 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution maintainers, and users of affected Linux kernel versions should assess exposure and apply patches or mitigations as necessary.

Why it matters

A vulnerability in the Linux kernel's dpaa2-switch component has been addressed. The IRQ handler did not validate the if_id extracted from the hardware status register, potentially leading to an out-of-bounds read. Linux kernel developers and users should assess exposure and apply patches or mitigations as necessary.

• Verify Linux kernel versions and apply patches to prevent potential out-of-bounds reads.
• Monitor system logs for exploitation attempts targeting the dpaa2-switch component.
• Review system configurations to ensure dpaa2-switch is properly secured.

Technical summary

The Linux kernel's dpaa2-switch component had a vulnerability where the IRQ handler did not validate the if_id extracted from the hardware status register. This could lead to an out-of-bounds read. The issue has been resolved by adding a bounds check. The vulnerability was identified in the Linux kernel's dpaa2-switch component, which is used for network processing. The out-of-bounds read could potentially lead to system crashes or information disclosure. The fix involves adding a bounds check to prevent accessing the ethsw->ports[] array out of bounds.

Defensive priority

Medium

Recommended defensive actions

• Review and apply the provided patches to ensure the dpaa2-switch component is updated.
• Verify the Linux kernel version is within the unaffected range.
• Monitor system logs for potential exploitation attempts.
• Perform a thorough review of system configurations to ensure dpaa2-switch is properly secured.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE Program record and NVD vulnerability detail provide information on the vulnerability. Linux kernel developers have addressed the issue through commits 77611cab5bdfff7a070ae574bbfba20a1de99d1b, 34b56c16efd61325d80bf1d780d0e176be662f59, f89e33c9c37f0001b730e23b3b05ab7b1ecface2, 2447edc367800ba914acf7ddd5d250416b45fb31, 1b381a638e1851d8cfdfe08ed9cdbec5295b18c9, and 31a7a0bbeb006bac2d9c81a2874825025214b6d8.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.