VulnerabilityPublished 11 Sep 2026Updated 21 Oct 2026

CVE-2026-89625: Linux kernel · HID: sony: fix UAF of ghl_poke_timer / ghl_urb at driver unbind

Affects Linux kernelSource GCVE Database

Authoritative record:CVE-2026-89625

Not known to be exploited.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
CVE published 11 Sep 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.

What to do

Affected software

Product	Affected	Fixed in
Ubuntu 26.04 LTSlinux`pkg:deb/ubuntu/linux?arch=source&distro=resolute`Other threats	Affected 6.17.0-5.5 – 7.0.0-38.38 23 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-aws`pkg:deb/ubuntu/linux-aws?arch=source&distro=resolute`Other threats	Affected 6.17.0-1002.2 – 7.0.0-1014.14 15 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-azure`pkg:deb/ubuntu/linux-azure?arch=source&distro=resolute`Other threats	Affected 6.17.0-1003.3 – 7.0.0-1017.17 15 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-azure-fde`pkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resolute`Other threats	Affected 7.0.0-1003.3 – 7.0.0-1016.16 9 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-gcp`pkg:deb/ubuntu/linux-gcp?arch=source&distro=resolute`Other threats	Affected 6.17.0-1002.2 – 7.0.0-1014.14 13 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-gke`pkg:deb/ubuntu/linux-gke?arch=source&distro=resolute`Other threats	Affected 7.0.0-1002.3 – 7.0.0-1008.9 6 affected builds	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available that properly poisons the URB before shutting down the timer to prevent re-arming on freed memory. Users should update to patched kernel versions that include this fix. No additional mitigation is required as the issue is resolved in the updated driver code.

Description

A use-after-free vulnerability in the Linux kernel's HID sony driver for Guitar Hero Live dongles was resolved. The flaw occurs during driver unbind when a timer callback re-arms a timer on freed memory, leading to a use-after-free condition. This is caused by improper synchronization and handling of USB request blocks (URBs) and timers during device removal. The issue was reproduced with Kernel Address Sanitizer (KASAN) confirming the use-after-free. The vulnerability affects specific Linux kernel versions including certain 4.15.x, 5.0.x, and 5.3.x builds.

Impact

The vulnerability results in a use-after-free condition in kernel memory during device removal, which can lead to kernel crashes or undefined behavior. It is a race condition between timer callbacks and device unbinding. There is no evidence of active exploitation in the wild. The impact is medium severity given the potential for system instability or denial of service.

Summary

The Linux kernel's HID sony driver for Guitar Hero Live dongles had a use-after-free vulnerability triggered during driver unbind. The sony_probe() function arms a periodic timer that submits a USB request block (URB). Upon driver removal, the timer is deleted with timer_delete_sync() and the URB freed with usb_free_urb(). However, timer_delete_sync() does not block the timer from being re-armed by a URB completion callback that can run after the timer deletion, and usb_free_urb() only drops a reference without killing an in-flight URB. This allows the timer to be re-armed on freed memory, causing a use-after-free. The fix involves poisoning the URB with usb_poison_urb() before shutting down the timer to prevent re-submission of the URB after free. The issue was confirmed with KASAN under emulation of the dongle. The probe error path is unaffected as it occurs before timer arming.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 25 Oct 2026, 02:41 UTC

Technical details

References

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