Description
In the Linux kernel, the following vulnerability has been resolved:

USB: iowarrior: fix use-after-free on disconnect

Submitted write URBs are not stopped on close() and therefore need to be
stopped unconditionally on disconnect() to avoid use-after-free in the
completion handler.
Published: 2026-07-25
Score: 7.0 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability resides in the USB iowarrior driver of the Linux kernel. During a device disconnect, queued URBs are not stopped, leading to a use‑after‑free in the URB completion handler. This flaw can corrupt kernel memory and may be exploited to crash the system or achieve arbitrary code execution with kernel privileges, compromising confidentiality, integrity, and availability.

Affected Systems

Any system running a Linux kernel that includes the iowarrior USB driver before the applied fix. The vendor is Linux and the product is the Linux kernel; specific version data is not enumerated, implying that any kernel build lacking the recent commits may be vulnerable.

Risk and Exploitability

The EPSS score of less than 1% indicates a low probability of active exploitation, and the vulnerability is not listed in the CISA KEV catalog. It requires a local attacker or one who can supply a malicious USB device or trigger a disconnect, thus the attack vector is likely physical or local. Though no public exploit exists, the kernel memory corruption remains a high‑impact risk due to the potential for privilege escalation.

Generated by OpenCVE AI on August 3, 2026 at 19:09 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade the system to a Linux kernel version that includes the patch which stops URBs on disconnect.
  • Reboot the system after updating the kernel so the corrected driver module loads.
  • Continuously monitor system logs for URB completion‑handler errors and enforce strict USB device policies to reduce exposure.

Generated by OpenCVE AI on August 3, 2026 at 19:09 UTC.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4717-1 linux security update
Debian DLA Debian DLA DLA-4720-1 linux security update
Debian DLA Debian DLA DLA-4723-1 linux-6.1 security update
Debian DLA Debian DLA DLA-4724-1 linux-6.12 new package
History

Thu, 30 Jul 2026 04:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Tue, 28 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-825
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate


Sun, 26 Jul 2026 02:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Sat, 25 Jul 2026 09:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: USB: iowarrior: fix use-after-free on disconnect Submitted write URBs are not stopped on close() and therefore need to be stopped unconditionally on disconnect() to avoid use-after-free in the completion handler.
Title USB: iowarrior: fix use-after-free on disconnect
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-07-25T08:50:05.169Z

Reserved: 2026-07-19T15:36:31.781Z

Link: CVE-2026-64342

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-07-25T10:17:16.227

Modified: 2026-08-11T15:00:57.447

Link: CVE-2026-64342

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-07-25T00:00:00Z

Links: CVE-2026-64342 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T19:15:04Z

Weaknesses
  • CWE-825

    Expired Pointer Dereference