Bug 2435665 (CVE-2026-23021)

Summary: CVE-2026-23021 kernel: Linux kernel (net: usb: pegasus): Denial of Service due to memory leak
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in the Linux kernel's `net: usb: pegasus` module. A local attacker with low privileges could exploit this vulnerability when the `usb_submit_urb()` function fails during asynchronous writes to device registers. This can lead to a memory leak, potentially causing a Denial of Service (DoS) due to resource exhaustion.
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Description OSIDB Bzimport 2026-01-31 12:02:30 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: usb: pegasus: fix memory leak in update_eth_regs_async()

When asynchronously writing to the device registers and if usb_submit_urb()
fail, the code fail to release allocated to this point resources.
Comment 1 Alexander B 2026-02-02 09:11:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026013136-CVE-2026-23021-8fc2@gregkh/T