CVE-2026-98932 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution maintainers, and users of the affected Linux kernel versions should assess exposure and apply patches to prevent potential exploitation.

Why it matters

A use-after-free vulnerability in the Linux kernel's EDAC/altera driver could lead to system instability, potential elevation of privileges, or denial of service attacks. Linux kernel developers, maintainers, and users of affected versions should assess exposure and apply patches.

• Potential system crashes or instability due to use-after-free vulnerability.
• Possible elevation of privileges or arbitrary code execution.
• Denial of Service (DoS) attacks may be feasible.
• Verification of affected versions and patch application is necessary.

Technical summary

The Linux kernel's EDAC/altera driver has a use-after-free vulnerability in both altr_edac_a10_device_add() and altr_portb_setup(). The error path frees the dci structure before releasing the devres group, potentially leading to an IRQ firing between freeing dci and unregistering the IRQs, and dereferencing the freed memory. This issue could result in system instability or elevation of privileges if exploited. Affected versions require verification and patching to prevent potential attacks. The fix involves releasing the devres group first to unregister managed IRQs before freeing the dci structure.

Defensive priority

High

Recommended defensive actions

• Review and apply patches provided by Linux kernel maintainers.
• Verify affected Linux kernel versions and apply fixes.
• Monitor system logs for exploitation attempts.
• Confirm affected product deployments exist and assign an owner.
• Review official advisories to validate scope and severity.
• Plan updates through change control for exposed systems.
• Track exceptions and retest remediated assets.

Evidence notes

The CVE record and source item provide details about the vulnerability, including its description and affected versions. However, the corpus does not establish specific exploitation or impact, requiring verification from official sources.

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.