Bug 2439894 (CVE-2026-23188)

Summary: CVE-2026-23188 kernel: Linux kernel: Denial of Service in r8152 USB network adapter driver
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel, specifically within the r8152 USB network adapter driver. This vulnerability allows a local attacker to trigger a device reset during a system resume operation. The issue arises from a recursive mutex lock, where the driver attempts to acquire the same lock twice, leading to a deadlock. This can cause the system to become unresponsive, resulting in a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-02-14 17:01:52 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: usb: r8152: fix resume reset deadlock

rtl8152 can trigger device reset during reset which
potentially can result in a deadlock:

 **** DPM device timeout after 10 seconds; 15 seconds until panic ****
 Call Trace:
 <TASK>
 schedule+0x483/0x1370
 schedule_preempt_disabled+0x15/0x30
 __mutex_lock_common+0x1fd/0x470
 __rtl8152_set_mac_address+0x80/0x1f0
 dev_set_mac_address+0x7f/0x150
 rtl8152_post_reset+0x72/0x150
 usb_reset_device+0x1d0/0x220
 rtl8152_resume+0x99/0xc0
 usb_resume_interface+0x3e/0xc0
 usb_resume_both+0x104/0x150
 usb_resume+0x22/0x110

The problem is that rtl8152 resume calls reset under
tp->control mutex while reset basically re-enters rtl8152
and attempts to acquire the same tp->control lock once
again.

Reset INACCESSIBLE device outside of tp->control mutex
scope to avoid recursive mutex_lock() deadlock.
Comment 1 Alexander B 2026-02-16 15:11:59 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026021432-CVE-2026-23188-c03c@gregkh/T