CVE-2026-98089 (GCVE-0-2026-98089)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:24 – Updated: 2026-09-25 10:24
VLAI
Title
bonding: alb: fix uninitialized transport header access in alb_determine_nd()
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().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549 , < e39cf90bd856443542b97933289749fca07476bf (git)
Affected: 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549 , < 27314f96d29b54e815e7a9b84c3273f1895e68e2 (git)
Affected: 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549 , < 3b178894931a268c09126a5b53630f343e10e296 (git)
Affected: 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549 , < 70f3995830d3f1e79faa14eb0605914f778feca9 (git)
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Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/net/bonding/bond_alb.c"
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              "negate": false,
              "operator": "OR"
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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": "2026-09-25T10:24:22.877Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/e39cf90bd856443542b97933289749fca07476bf"
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        },
        {
          "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": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98089",
    "datePublished": "2026-09-25T10:24:22.877Z",
    "dateReserved": "2026-09-25T10:19:56.075Z",
    "dateUpdated": "2026-09-25T10:24:22.877Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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                ],
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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()."
          }
        ],
        "id": "CVE-2026-98089",
        "lastModified": "2026-09-25T11:17:38.590",
        "metrics": {},
        "published": "2026-09-25T11:17:38.590",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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