{"id":"CVE-2026-98419","published":"2026-10-14T14:17:53.290","lastModified":"2026-10-14T14:17:53.290","description":"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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/03b672eba4937ff18337049824a114012d57f202","tags":[]},{"url":"https://git.kernel.org/stable/c/439f392084f8f7f59ab9d47a9579185accefe1d8","tags":[]},{"url":"https://git.kernel.org/stable/c/530ae0a1458078c7a81fbffd9ff17d42129364d9","tags":[]},{"url":"https://git.kernel.org/stable/c/56b12f0cd476e4d90a0e2663a80102b388ebf78c","tags":[]},{"url":"https://git.kernel.org/stable/c/88d640efd655b10f9fa4e381caf777da1f17c2a6","tags":[]},{"url":"https://git.kernel.org/stable/c/8a04047c6dbff2f49a561b1ff53b043f4807e855","tags":[]},{"url":"https://git.kernel.org/stable/c/caf09c09e0f323015ab6777ed1bad5aa10688631","tags":[]},{"url":"https://git.kernel.org/stable/c/d54a044136b129822715e8798899af540ec7a9e9","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}