{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"638328ca9c17ae6511ad62198c57bae32ffa3c91","status":"affected","version":"afba937e540c902c989cd516fd97ea0c8499bb27","versionType":"git"},{"lessThan":"170e8daca24da6edb4be82ab01abf44e87af387b","status":"affected","version":"afba937e540c902c989cd516fd97ea0c8499bb27","versionType":"git"},{"lessThan":"c8fa96ed021923dae147bcd9f9205b8df7b82360","status":"affected","version":"afba937e540c902c989cd516fd97ea0c8499bb27","versionType":"git"},{"lessThan":"4ee3062bf2c9a722afef429826e8607eaf3fc6a0","status":"affected","version":"afba937e540c902c989cd516fd97ea0c8499bb27","versionType":"git"},{"lessThan":"276aef0fd2b92f41b920ac891c72cadeee957934","status":"affected","version":"afba937e540c902c989cd516fd97ea0c8499bb27","versionType":"git"},{"lessThan":"67ed312124bb1b61858778ac0b985b48961c862a","status":"affected","version":"afba937e540c902c989cd516fd97ea0c8499bb27","versionType":"git"},{"lessThan":"e3c874b05901dc519054b5107d16620e6d2b5fea","status":"affected","version":"afba937e540c902c989cd516fd97ea0c8499bb27","versionType":"git"},{"lessThan":"8df672bfe3ec2268c2636584202755898e547173","status":"affected","version":"afba937e540c902c989cd516fd97ea0c8499bb27","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"status":"affected","version":"2.6.26"},{"lessThan":"2.6.26","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.167","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.19","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cveId":"CVE-2026-43427","cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: class: cdc-wdm: fix reordering issue in read code path\n\nQuoting the bug report:\n\nDue to compiler optimization or CPU out-of-order execution, the\ndesc->length update can be reordered before the memmove. If this\nhappens, wdm_read() can see the new length and call copy_to_user() on\nuninitialized memory. This also violates LKMM data race rules [1].\n\nFix it by using WRITE_ONCE and memory barriers.","epss":{"date":"2026-11-06","percentile":0.02818,"score":0.00132},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793979773217,"publishedAt":1778250120345,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387b"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862a"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5fea"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173"}],"remediation":[],"revision":"5e0c68643673916368797fe9e618f18592d61dc5066d57d58e9184699c542987","sources":[{"modifiedAt":1793979773217,"name":"CNA: Linux","retrievedAt":1793981703007,"url":"https://www.cve.org/CVERecord?id=CVE-2026-43427"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793981731975,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-43427"}],"ssvc":{"assessedAt":1793979489164,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"usb: class: cdc-wdm: fix reordering issue in read code path","updatedAt":1793981731975}