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CVE-2026-64334— USB: serial: digi_acceleport: fix hard lockup on disconnect

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digi_acceleport驱动在发送OOB命令时未检查URB提交错误，导致在设备断开连接时驱动程序无限循环并禁用中断，可能造成系统挂起。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.10% · P1

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6e51147c2744d15730084dc89cc99180d3de4184 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6a8592ace932081ea11aea41c460a1ca0f6344a4 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5a82d842e8c35227d7227f19e5e654df1451782c affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< bcfeae431db9986c2b313e6a760f2ac8df61e138 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2067b3838da6e4af03bae3630414193188d754b2 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2b7dc482f859f2d027db07ff0efc1c5df5b3451a affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 79bc131df0e50f8f663c1fdbbe952aaf193a8d39 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5c1ea24b53bf3bfb859f0a05573997487975da23 affected
… +10 more rows
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I. Basic Information for CVE-2026-64334

Vulnerability Information
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Vulnerability Title
USB: serial: digi_acceleport: fix hard lockup on disconnect
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: USB: serial: digi_acceleport: fix hard lockup on disconnect If submitting the OOB write urb fails persistently (e.g if the device is being disconnected) the driver would loop indefinitely with interrupts disabled. Check for urb submission errors when sending OOB commands to avoid hanging if, for example, open(), set_termios() or close() races with a physical disconnect. This is issue was flagged by Sashiko when reviewing an unrelated change to the driver.
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digi_acceleport驱动在发送OOB命令时未检查URB提交错误，导致在设备断开连接时驱动程序无限循环并禁用中断，可能造成系统挂起。
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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 6e51147c2744d15730084dc89cc99180d3de4184 -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2026-64334

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III. Intelligence Information for CVE-2026-64334

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Patches & Fixes for CVE-2026-64334 (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-2026-64334

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