VDB
CVE-2026-43427
CVE-2026-43427
PUBLISHED
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.
EPSS 0.01% · 2.5th percentile
Risk Scores
EPSS Score
0.01%
2.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 6.19.9, 6.6.130, 6.12.78 |
| linux | linux_kernel | 2.6.26, 2.6.26, 2.6.26 |
Timeline
- May 8, 2026 CVE Published
- May 8, 2026 Security Advisory
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score
- May 26, 2026 EPSS Score
- May 27, 2026 EPSS Score
References
- https://git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91 url
- https://git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387b url
- https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360 url
- https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0 url
- https://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934 url
- https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862a url
- https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5fea url
- https://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173 url
- https://nvd.nist.gov/vuln/detail/CVE-2026-43427 advisory
- https://lists.debian.org/debian-lts-announce/2026/05/msg00051.html advisory
- https://lists.debian.org/debian-lts-announce/2026/05/msg00052.html advisory