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CVE-2026-98910: drm/amdkfd: Unwind debug trap enable on copy_to_user failure

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-23 · updated 2026-10-26

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Unwind debug trap enable on copy_to_user failure If kfd_dbg_trap_enable() fails while copying runtime_info to userspace, it had already activated the trap, set debug_trap_enabled, taken an extra process reference, and opened the debug event file. Return -EFAULT without unwinding that state, leaving inconsistent trap state and a refcount imbalance that could break later DISABLE/ENABLE. On copy_to_user failure, deactivate the trap and undo the rest of the enable setup before returning.

Affected products

• Linux kernel: before 6.6.158; before 6.12.111; before 6.18.53 — fixed in 6.12.111, 6.18.53, 6.6.158, 7.2

How to fix

Upgrade to a fixed version: Linux kernel 6.12.111, 6.18.53, 6.6.158, 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/01112e241e37f9ac98b6f418d93ce2e0b87b7ee0
• https://git.kernel.org/stable/c/1b39f46eec2f907417d4955bb88434170f94a8d8
• https://git.kernel.org/stable/c/641be20110cdfb6d921605adb42a764a0fccac54
• https://git.kernel.org/stable/c/656a40bdc20def58790b8512e6000195436d8855

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