High severity7.1NVD Advisory· Published May 8, 2026· Updated Jun 17, 2026
CVE-2026-43427
CVE-2026-43427
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
30cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 15 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=2.6.26.1,<5.10.253
- cpe:2.3:o:linux:linux_kernel:2.6.26:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.26:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.26:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.26:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.26:rc7:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.26:rc8:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.26:rc9:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
- (no CPE)
- osv-coords14 versionspkg:linux/kernelpkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0
>= 2.6.26, < 5.10.253+ 13 more
- (no CPE)range: >= 2.6.26, < 5.10.253
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1.160000.2.19
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387bnvdPatch
- git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934nvdPatch
- git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0nvdPatch
- git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91nvdPatch
- git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862anvdPatch
- git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173nvdPatch
- git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360nvdPatch
- git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5feanvdPatch
News mentions
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