CVE-2026-43427None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: usb: class: cdc-wdm: fix reordering issue in read code path Quoting the bug report: Due to compiler optimization or CPU out-of-order execution, the desc->length updat…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
usb: class: cdc-wdm: fix reordering issue in read code path
Quoting the bug report:
Due to compiler optimization or CPU out-of-order execution, the desc->length update can be reordered before the memmove. If this happens, wdm_read() can see the new length and call copy_to_user() on uninitialized memory. This also violates LKMM data race rules [1].
Fix it by using WRITE_ONCE and memory barriers.
Linux >= afba937e540c902c989cd516fd97ea0c8499bb27 < 638328ca9c17ae6511ad62198c57bae32ffa3c91Linux >= afba937e540c902c989cd516fd97ea0c8499bb27 < 170e8daca24da6edb4be82ab01abf44e87af387bLinux >= afba937e540c902c989cd516fd97ea0c8499bb27 < c8fa96ed021923dae147bcd9f9205b8df7b82360Linux >= afba937e540c902c989cd516fd97ea0c8499bb27 < 4ee3062bf2c9a722afef429826e8607eaf3fc6a0Linux >= afba937e540c902c989cd516fd97ea0c8499bb27 < 276aef0fd2b92f41b920ac891c72cadeee957934Linux >= afba937e540c902c989cd516fd97ea0c8499bb27 < 67ed312124bb1b61858778ac0b985b48961c862aLinux >= afba937e540c902c989cd516fd97ea0c8499bb27 < e3c874b05901dc519054b5107d16620e6d2b5feaLinux >= afba937e540c902c989cd516fd97ea0c8499bb27 < 8df672bfe3ec2268c2636584202755898e547173Linux 2.6.26Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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