{"cve":"CVE-2026-46182","nvd":{"published":"2026-05-28T10:16:33.837","modified":"2026-06-17T10:53:13.923","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npseries/papr-hvpipe: Prevent kernel stack memory leak to userspace\n\nThe hdr variable is allocated on the stack and only hdr.version and\nhdr.flags are initialized explicitly. Because the struct papr_hvpipe_hdr\ncontains reserved padding bytes (reserved[3] and reserved2[40]), these\ncould leak the uninitialized bytes to userspace after copy_to_user().\n\nThis patch fixes that by initializing the whole struct to 0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-401"],"references":["https://git.kernel.org/stable/c/0479b6e9f999cc1cbad7d9f09f574fc387e605d5","https://git.kernel.org/stable/c/cefeed44296261173a806bef988b26bc565da4be","https://git.kernel.org/stable/c/f88f8e4485b437e0a2f96a7ff1f88aa22d925659"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-46182","score":0.00126,"percentile":0.02285,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}