VulnerabilityPublished 23 Oct 2026

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

Source GCVE Database

Authoritative record:CVE-2026-98910· Medium

Not known to be exploited · fixed in 01112e241e37f9ac98b6f418d93ce2e0b87b7ee0 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 01112e241e37f9ac98b6f418d93ce2e0b87b7ee0, 656a40bdc20def58790b8512e6000195436d8855, 641be20110cdfb6d921605adb42a764a0fccac54 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-9wgp-44pj-7g49

What to do

Upgrade Linux kernel to 01112e241e37f9ac98b6f418d93ce2e0b87b7ee0, 656a40bdc20def58790b8512e6000195436d8855, 641be20110cdfb6d921605adb42a764a0fccac54 or 1b39f46eec2f907417d4955bb88434170f94a8d8.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 0ab2d7532b05a3e7c06fd3b0c8bd6b46c1dfb508, < 01112e241e37f9ac98b6f418d93ce2e0b87b7ee0	Fixed in 01112e241e37f9ac98b6f418d93ce2e0b87b7ee0
LinuxLinux	Affected ≥ 0ab2d7532b05a3e7c06fd3b0c8bd6b46c1dfb508, < 656a40bdc20def58790b8512e6000195436d8855	Fixed in 656a40bdc20def58790b8512e6000195436d8855
LinuxLinux	Affected ≥ 0ab2d7532b05a3e7c06fd3b0c8bd6b46c1dfb508, < 641be20110cdfb6d921605adb42a764a0fccac54	Fixed in 641be20110cdfb6d921605adb42a764a0fccac54
LinuxLinux	Affected ≥ 0ab2d7532b05a3e7c06fd3b0c8bd6b46c1dfb508, < 1b39f46eec2f907417d4955bb88434170f94a8d8	Fixed in 1b39f46eec2f907417d4955bb88434170f94a8d8
LinuxLinux	Affected =6.5	Fixed in–

AI-suggested

A fix has been implemented to ensure that on copy_to_user failure, the trap is deactivated and all related state changes are undone before returning. Users should apply the official kernel update that includes this fix once available. Patch status is not explicitly confirmed in the provided data; verify with the vendor or kernel maintainers for the current remediation status.

Description

A vulnerability in the Linux kernel's drm/amdkfd component was resolved that involved improper state cleanup when kfd_dbg_trap_enable() fails during copy_to_user operations. The failure to unwind the trap state and release resources on copy_to_user failure could lead to inconsistent trap states and reference count imbalances, potentially affecting subsequent debug trap enable/disable operations.

Impact

The inconsistent trap state and reference count imbalance can cause instability or malfunction in the debug trap enable/disable mechanism within the drm/amdkfd kernel component. This could affect kernel debugging operations related to AMD devices but does not directly indicate privilege escalation or arbitrary code execution. No known exploits in the wild have been reported.

Summary

The vulnerability in the Linux kernel's drm/amdkfd subsystem occurs when kfd_dbg_trap_enable() fails while copying runtime_info to userspace. Although the trap is activated and debug_trap_enabled is set, along with an extra process reference and an opened debug event file, a failure in copy_to_user returns -EFAULT without undoing these changes. This leaves the trap state inconsistent and causes a reference count imbalance, which could disrupt later disable/enable operations of the debug trap. The fix involves deactivating the trap and undoing the enable setup on copy_to_user failure before returning.

References

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