{"id":"CVE-2026-98183","summary":"wifi: mac80211: avoid out-of-bounds read for empty PREQ elements","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: avoid out-of-bounds read for empty PREQ elements\n\nieee80211_mesh_preq_size_ok() derives the location of the PREQ bottom\nfields before checking whether the element contains even the fixed\nheader. ieee80211_mesh_hwmp_preq_get_bottom() reads the flags byte to\naccount for the optional Address Extension field. Consequently, an\nempty PREQ element causes a one-byte read beyond its declared payload.\n\nMove the helper call after both size checks, so the bottom fields are\nonly accessed when they are present.","modified":"2026-10-08T02:52:51.819209437Z","published":"2026-10-06T08:44:26.024Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98183.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3beddbd56946577478fd5e649f556aaaebe15b0a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e6031f02269c0f51cf67886d177f02bc300b47cd"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98183.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98183"},{"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":"8b40b1d24a6099fe9fac8e207d4cb04ab5e0baae"},{"fixed":"3beddbd56946577478fd5e649f556aaaebe15b0a"},{"fixed":"e6031f02269c0f51cf67886d177f02bc300b47cd"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98183.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.2.0"},{"fixed":"7.2.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98183.json"}}],"schema_version":"1.9.0"}