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CVE-2026-64338— USB: misc: uss720: unregister parport on probe failure

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基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于uss720驱动在探测失败时未取消注册并行端口，可能导致资源泄漏和悬空指针。

AI Predicted 3.3 Difficulty: Moderate EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 28

VendorProduct Version RangeStatus
Linux Linux 04736c1bc32197f7d859e01a96ae80a16659931d< 6bbb98bec71b577fda4f4b48f7aea5874b04a576 affected
4eaf2331a77996bbbaf2b824d452ac8ebda7e6e7< 93563243377f8e9b46cc94d9c4f06533dd31b141 affected
8fc246a8a456679993df565d3c9e3da28030ee43< 1712fd71a5aaf81e47c747f180535fa963ad7830 affected
10132ccf99f49b43aeb7470df50d72344a601ad6< 0b3073f40cc9f95d5ff0037eb0a06f5c1725a7ea affected
3295f1b866bfbcabd625511968e8a5c541f9ab32< 5e62d7857fd51b908b8371062ee839739a086bbe affected
3295f1b866bfbcabd625511968e8a5c541f9ab32< 729b68a5bad71220ae0914c8bdab9488ad5be6c8 affected
3295f1b866bfbcabd625511968e8a5c541f9ab32< 48dd0b2ec9f2e97c486eb68cd0a64b25c1c3df3e affected
3295f1b866bfbcabd625511968e8a5c541f9ab32< b4ecbdc4f8830f5586c4a5cfc384c00f20f8f8b3 affected
… +20 more rows
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I. Basic Information for CVE-2026-64338

Vulnerability Information
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Vulnerability Title
USB: misc: uss720: unregister parport on probe failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: USB: misc: uss720: unregister parport on probe failure uss720_probe() registers a parport before reading the 1284 register used to detect unsupported Belkin F5U002 adapters. If get_1284_register() fails, the error path drops the driver private data and the USB device reference, but leaves the parport device registered. Leaving the port registered is more than a private allocation leak: parport_register_port() has already reserved a parport number and registered the parport bus device, while pp->private_data still points at the private data that the common error path is about to release. Undo the pre-announce registration in the get_1284_register() failure branch before jumping to the common private-data cleanup path. Clear priv->pp first, matching the disconnect path and avoiding a stale pointer in the private data. This issue was identified during our ongoing static-analysis research while reviewing kernel code.
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基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于uss720驱动在探测失败时未取消注册并行端口，可能导致资源泄漏和悬空指针。
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 04736c1bc32197f7d859e01a96ae80a16659931d ~ 6bbb98bec71b577fda4f4b48f7aea5874b04a576 -
Linux Linux 6.10 -

II. Public POCs for CVE-2026-64338

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III. Intelligence Information for CVE-2026-64338

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Patches & Fixes for CVE-2026-64338 (8)

Same Patch Batch · Linux · 2026-07-25 · 274 CVEs total

CVE-2026-64355 9.8 CRITICAL bpf: Reject fragmented frames in devmap
CVE-2026-64459 9.8 CRITICAL tcp: restore RCU grace period in tcp_ao_destroy_sock
CVE-2026-64303 9.8 CRITICAL spi: fsl-lpspi: terminate the RX channel on TX prepare failure path
CVE-2026-64439 9.8 CRITICAL crypto: krb5 - filter out async aead implementations at alloc
CVE-2026-64410 9.8 CRITICAL netfilter: flowtable: IPIP tunnel hardware offload is not yet support
CVE-2026-64399 9.8 CRITICAL ksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE
CVE-2026-64397 9.8 CRITICAL ksmbd: serialize QUERY_DIRECTORY requests per file
CVE-2026-64391 9.8 CRITICAL ksmbd: use opener credentials for ADS I/O
CVE-2026-64387 9.8 CRITICAL smb: client: fix query directory replay double-free
CVE-2026-64386 9.8 CRITICAL smb: client: fix query_info() replay double-free
CVE-2026-64385 9.8 CRITICAL smb: client: fix double-free in SMB2_ioctl() replay
CVE-2026-64383 9.8 CRITICAL smb: client: fix double-free in SMB2_flush() replay
CVE-2026-64384 9.8 CRITICAL smb: client: fix change notify replay double-free
CVE-2026-64268 9.8 CRITICAL RDMA/siw: bound Read Response placement to the RREAD length
CVE-2026-64523 9.8 CRITICAL net/handshake: Take a long-lived file reference at submit
CVE-2026-64269 9.1 CRITICAL RDMA/rtrs-srv: Bound RDMA-Write length to chunk size in rdma_write_sg
CVE-2026-64257 9.1 CRITICAL smb: client: reject overlapping data areas in SMB2 responses
CVE-2026-64319 9.1 CRITICAL nvmet-auth: validate reply message payload bounds against transfer length
CVE-2026-64320 9.1 CRITICAL nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page
CVE-2026-64393 9.1 CRITICAL ksmbd: run set info with opener credentials

Showing top 20 of 274 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64338

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