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CVE-2026-23021— net: usb: pegasus: fix memory leak in update_eth_regs_async()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于usb_submit_urb失败时未释放资源，可能导致内存泄漏。

AI Predicted 5.5 Difficulty: Easy EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 323b34963d113efb566635f43858f40cce01d5f9< 5397ea6d21c35a17707e201a60761bdee00bcc4e affected
323b34963d113efb566635f43858f40cce01d5f9< a40af9a2904a1ab8ce61866ebe2a894ef30754ba affected
323b34963d113efb566635f43858f40cce01d5f9< ac5d92d2826dec51e5d4c6854865bc5817277452 affected
323b34963d113efb566635f43858f40cce01d5f9< 93f18eaa190374e0f2d253e3b1a65cee19a7abe6 affected
323b34963d113efb566635f43858f40cce01d5f9< 471dfb97599eec74e0476046b3ef8e7037f27b34 affected
323b34963d113efb566635f43858f40cce01d5f9< ce6eef731aba23a988decea1df3b08cf978f7b01 affected
323b34963d113efb566635f43858f40cce01d5f9< afa27621a28af317523e0836dad430bec551eb54 affected
3.10 affected
… +8 more rows
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I. Basic Information for CVE-2026-23021

Vulnerability Information
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Vulnerability Title
net: usb: pegasus: fix memory leak in update_eth_regs_async()
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于usb_submit_urb失败时未释放资源，可能导致内存泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 323b34963d113efb566635f43858f40cce01d5f9 ~ 5397ea6d21c35a17707e201a60761bdee00bcc4e -
Linux Linux 3.10 -

II. Public POCs for CVE-2026-23021

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III. Intelligence Information for CVE-2026-23021

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Same Patch Batch · Linux · 2026-01-31 · 37 CVEs total

CVE-2025-71183 9.1 CRITICAL btrfs: always detect conflicting inodes when logging inode refs
CVE-2026-23018 btrfs: release path before initializing extent tree in btrfs_read_locked_inode()
CVE-2025-71187 dmaengine: sh: rz-dmac: fix device leak on probe failure
CVE-2025-71186 dmaengine: stm32: dmamux: fix device leak on route allocation
CVE-2025-71185 dmaengine: ti: dma-crossbar: fix device leak on am335x route allocation
CVE-2026-23024 idpf: fix memory leak of flow steer list on rmmod
CVE-2026-23023 idpf: fix memory leak in idpf_vport_rel()
CVE-2026-23022 idpf: fix memory leak in idpf_vc_core_deinit()
CVE-2026-23020 net: 3com: 3c59x: fix possible null dereference in vortex_probe1()
CVE-2026-23019 net: marvell: prestera: fix NULL dereference on devlink_alloc() failure
CVE-2025-71189 dmaengine: dw: dmamux: fix OF node leak on route allocation failure
CVE-2026-23017 idpf: fix error handling in the init_task on load
CVE-2026-23016 inet: frags: drop fraglist conntrack references
CVE-2026-23015 gpio: mpsse: fix reference leak in gpio_mpsse_probe() error paths
CVE-2025-71184 btrfs: fix NULL dereference on root when tracing inode eviction
CVE-2025-71182 can: j1939: make j1939_session_activate() fail if device is no longer registered
CVE-2025-71181 rust_binder: remove spin_lock() in rust_shrink_free_page()
CVE-2025-71180 counter: interrupt-cnt: Drop IRQF_NO_THREAD flag
CVE-2026-23031 can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak
CVE-2026-23039 drm/gud: fix NULL fb and crtc dereferences on USB disconnect

Showing top 20 of 37 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23021

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