{
  "public_date" : "2026-04-25T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: batman-adv: avoid OGM aggregation when skb tailroom is insufficient",
    "id" : "2461756",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2461756"
  },
  "cwe" : "CWE-131",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nbatman-adv: avoid OGM aggregation when skb tailroom is insufficient\nWhen OGM aggregation state is toggled at runtime, an existing forwarded\npacket may have been allocated with only packet_len bytes, while a later\npacket can still be selected for aggregation. Appending in this case can\nhit skb_put overflow conditions.\nReject aggregation when the target skb tailroom cannot accommodate the new\npacket. The caller then falls back to creating a new forward packet\ninstead of appending.", "A flaw was found in the batman-adv module of the Linux kernel. This vulnerability arises when the Optimized Global Messaging (OGM) aggregation state is dynamically altered, leading to insufficient buffer space (skb tailroom) for network packets. A remote attacker could exploit this condition by sending specially crafted network packets, potentially causing a memory corruption vulnerability that results in a system crash or denial of service. The system may become unstable or unresponsive." ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-31683\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31683\nhttps://lore.kernel.org/linux-cve-announce/2026042545-CVE-2026-31683-b833@gregkh/T" ],
  "name" : "CVE-2026-31683",
  "csaw" : false
}