{"id":"CVE-2026-98419","summary":"drop_monitor: fix out-of-bounds write in reset_per_cpu_data()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrop_monitor: fix out-of-bounds write in reset_per_cpu_data()\n\nIn reset_per_cpu_data(), al is computed as:\n\n    al = sizeof(struct net_dm_alert_msg);\n    al += dm_hit_limit * sizeof(struct net_dm_drop_point);\n    al += sizeof(struct nlattr);\n\n    skb = genlmsg_new(al, GFP_KERNEL);\n    ...\n    nla = nla_reserve(skb, NLA_UNSPEC, sizeof(struct net_dm_alert_msg));\n    ...\n    msg = nla_data(nla);\n    memset(msg, 0, al);\n\nBecause al includes sizeof(struct nlattr) (the 4-byte attribute header),\ngenlmsg_new() allocates al bytes of tailroom starting at nla.\nHowever, msg points to nla_data(nla), which is located\nsizeof(struct nlattr) bytes past nla. Calling memset(msg, 0, al)\ntherefore writes al bytes starting from msg, exceeding the allocated\nbuffer by sizeof(struct nlattr) (4 bytes) and corrupting\nskb_shared_info.\n\nFix this by letting al represent only the payload length, allocating\nthe skb with genlmsg_new(nla_total_size(al), GFP_KERNEL), and zeroing\nal bytes from msg.","modified":"2026-10-15T02:47:29.007638868Z","published":"2026-10-14T13:27:49.005Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98419.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/03b672eba4937ff18337049824a114012d57f202"},{"type":"WEB","url":"https://git.kernel.org/stable/c/439f392084f8f7f59ab9d47a9579185accefe1d8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/530ae0a1458078c7a81fbffd9ff17d42129364d9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/56b12f0cd476e4d90a0e2663a80102b388ebf78c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/88d640efd655b10f9fa4e381caf777da1f17c2a6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8a04047c6dbff2f49a561b1ff53b043f4807e855"},{"type":"WEB","url":"https://git.kernel.org/stable/c/caf09c09e0f323015ab6777ed1bad5aa10688631"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d54a044136b129822715e8798899af540ec7a9e9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98419.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98419"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"683703a26e4677db437a1480682851e27c7a154f"},{"fixed":"caf09c09e0f323015ab6777ed1bad5aa10688631"},{"fixed":"56b12f0cd476e4d90a0e2663a80102b388ebf78c"},{"fixed":"88d640efd655b10f9fa4e381caf777da1f17c2a6"},{"fixed":"d54a044136b129822715e8798899af540ec7a9e9"},{"fixed":"8a04047c6dbff2f49a561b1ff53b043f4807e855"},{"fixed":"530ae0a1458078c7a81fbffd9ff17d42129364d9"},{"fixed":"03b672eba4937ff18337049824a114012d57f202"},{"fixed":"439f392084f8f7f59ab9d47a9579185accefe1d8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98419.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.31"},{"fixed":"5.10.271"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.222"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.189"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.158"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.112"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.54"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98419.json"}}],"schema_version":"1.9.0"}