{"id":"CVE-2026-43089","summary":"xfrm_user: fix info leak in build_mapping()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_mapping()\n\nstruct xfrm_usersa_id has a one-byte padding hole after the proto\nfield, which ends up never getting set to zero before copying out to\nuserspace.  Fix that up by zeroing out the whole structure before\nsetting individual variables.","modified":"2026-06-03T03:55:13.182070918Z","published":"2026-05-06T07:40:22.630Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43089.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02"},{"type":"WEB","url":"https://git.kernel.org/stable/c/521385cbd50ca9474396d88462fcdfa6489685d9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10"},{"type":"WEB","url":"https://git.kernel.org/stable/c/72a8de41c3eb4dcf22bf3b674ea38fb2f75d6f32"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c2779ae9a3e5a044e5ccd564681511bbbcc5fc0f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43089.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43089"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4"},{"fixed":"521385cbd50ca9474396d88462fcdfa6489685d9"},{"fixed":"c2779ae9a3e5a044e5ccd564681511bbbcc5fc0f"},{"fixed":"72a8de41c3eb4dcf22bf3b674ea38fb2f75d6f32"},{"fixed":"d3125c541a96fb3c0fc7210112684baf22b6c24d"},{"fixed":"5a1a4b049ddde41466ccac0daeec326254b133f2"},{"fixed":"f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c"},{"fixed":"700c9622b23c33b5933e6dcea816492c064e4e10"},{"fixed":"1beb76b2053b68c491b78370794b8ff63c8f8c02"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43089.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.29"},{"fixed":"5.10.258"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.209"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.175"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.136"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.83"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.24"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.14"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43089.json"}}],"schema_version":"1.7.5"}