CVE-2026-98089 (GCVE-0-2026-98089)
Vulnerability from cvelistv5
Published
2026-09-25 10:24
Modified
2026-10-19 09:13
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bonding: alb: fix uninitialized transport header access in alb_determine_nd() alb_determine_nd() uses icmp6_hdr(skb) to inspect ICMPv6 headers. However, in xmit paths (e.g. packets sent via AF_PACKET / raw sockets or forwarded packets), skb->transport_header is not guaranteed to be initialized. While pskb_network_may_pull() ensures the packet data is linear starting from the network header, it does not set or adjust the transport header offset. Dereferencing icmp6_hdr(skb) can therefore access out-of-bounds memory. Fetch the icmp6hdr directly after ipv6hdr following pskb_network_may_pull(), and reload ipv6hdr in case pskb_may_pull() reallocated skb->head. Also remove the unused bond argument from alb_determine_nd().
References
Impacted products
Vendor Product Version
Linux Linux Version: 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549
Version: 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549
Version: 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549
Version: 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549
Version: 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549
Version: 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549
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{
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            "drivers/net/bonding/bond_alb.c"
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      "cpeApplicability": [
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          "nodes": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: alb: fix uninitialized transport header access in alb_determine_nd()\n\nalb_determine_nd() uses icmp6_hdr(skb) to inspect ICMPv6 headers.\nHowever, in xmit paths (e.g. packets sent via AF_PACKET / raw sockets\nor forwarded packets), skb-\u003etransport_header is not guaranteed to be\ninitialized. While pskb_network_may_pull() ensures the packet data is\nlinear starting from the network header, it does not set or adjust the\ntransport header offset.\n\nDereferencing icmp6_hdr(skb) can therefore access out-of-bounds memory.\n\nFetch the icmp6hdr directly after ipv6hdr following pskb_network_may_pull(),\nand reload ipv6hdr in case pskb_may_pull() reallocated skb-\u003ehead.\nAlso remove the unused bond argument from alb_determine_nd()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:13:41.394Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/862c8eb6947689c44fe11353755576a3672563a5"
        },
        {
          "url": "https://git.kernel.org/stable/c/7adb1bf25b0c5cedfb49b6e82844394d4f3c0d99"
        },
        {
          "url": "https://git.kernel.org/stable/c/e39cf90bd856443542b97933289749fca07476bf"
        },
        {
          "url": "https://git.kernel.org/stable/c/27314f96d29b54e815e7a9b84c3273f1895e68e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b178894931a268c09126a5b53630f343e10e296"
        },
        {
          "url": "https://git.kernel.org/stable/c/70f3995830d3f1e79faa14eb0605914f778feca9"
        }
      ],
      "title": "bonding: alb: fix uninitialized transport header access in alb_determine_nd()",
      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98089",
    "datePublished": "2026-09-25T10:24:22.877Z",
    "dateReserved": "2026-09-25T10:19:56.075Z",
    "dateUpdated": "2026-10-19T09:13:41.394Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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