CVE-2026-43427In 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-orde…
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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.
- CVSS
- 7.1 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 2.6.26.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.19; from 6.19 before 6.19.9; 2.6.26; and 13 more ranges | NVD |
References
- https://git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387bpatch
- https://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934patch
- https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0patch
- https://git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91patch
- https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862apatch
- https://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173patch
- https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360patch
- https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5feapatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.