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CVE-2026-64342— USB: iowarrior: fix use-after-free 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 2.6.21版本存在安全漏洞，该漏洞源于提交的写URB在close()时未停止，在断开连接时也未无条件停止，导致释放后重用。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 946b960d13c15f050a3b848987aaca79f6a459b7< d058d377291567b72aea33b017215cbfb383b0ad affected
946b960d13c15f050a3b848987aaca79f6a459b7< a7bbe946ca3a6eeb6f364d5e84b05e02c7c0d595 affected
946b960d13c15f050a3b848987aaca79f6a459b7< 97ad9337127be04ca0b027c2b01e69302353f404 affected
946b960d13c15f050a3b848987aaca79f6a459b7< 164398601a7f160bc3df1efa454f983302cef03f affected
946b960d13c15f050a3b848987aaca79f6a459b7< f328b0e9a0dbd162f5db1b83026b689f2fea2241 affected
946b960d13c15f050a3b848987aaca79f6a459b7< b748f97aff339e7f08dca9cf38a05b980fb66fea affected
946b960d13c15f050a3b848987aaca79f6a459b7< e4596816984efc537e7c04c1af0c639394f967f7 affected
946b960d13c15f050a3b848987aaca79f6a459b7< bc0e4f16c44e50daa0b1ea729934baa3b4815dee affected
… +10 more rows
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I. Basic Information for CVE-2026-64342

Vulnerability Information
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Vulnerability Title
USB: iowarrior: fix use-after-free on disconnect
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: USB: iowarrior: fix use-after-free on disconnect Submitted write URBs are not stopped on close() and therefore need to be stopped unconditionally on disconnect() to avoid use-after-free in the completion handler.
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 2.6.21版本存在安全漏洞，该漏洞源于提交的写URB在close()时未停止，在断开连接时也未无条件停止，导致释放后重用。
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 946b960d13c15f050a3b848987aaca79f6a459b7 ~ d058d377291567b72aea33b017215cbfb383b0ad -
Linux Linux 2.6.21 -

II. Public POCs for CVE-2026-64342

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III. Intelligence Information for CVE-2026-64342

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Patches & Fixes for CVE-2026-64342 (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-2026-64342

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