FKIE_CVE-2026-98089

Vulnerability from fkie_nvd - Published: 2026-09-25 11:17 - Updated: 2026-09-25 11:17
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/27314f96d29b54e815e7a9b84c3273f1895e68e2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3b178894931a268c09126a5b53630f343e10e296
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/70f3995830d3f1e79faa14eb0605914f778feca9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e39cf90bd856443542b97933289749fca07476bf
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/bonding/bond_alb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e39cf90bd856443542b97933289749fca07476bf",
              "status": "affected",
              "version": "0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549",
              "versionType": "git"
            },
            {
              "lessThan": "27314f96d29b54e815e7a9b84c3273f1895e68e2",
              "status": "affected",
              "version": "0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549",
              "versionType": "git"
            },
            {
              "lessThan": "3b178894931a268c09126a5b53630f343e10e296",
              "status": "affected",
              "version": "0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549",
              "versionType": "git"
            },
            {
              "lessThan": "70f3995830d3f1e79faa14eb0605914f778feca9",
              "status": "affected",
              "version": "0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/bonding/bond_alb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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",
      "url": "https://git.kernel.org/stable/c/27314f96d29b54e815e7a9b84c3273f1895e68e2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3b178894931a268c09126a5b53630f343e10e296"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/70f3995830d3f1e79faa14eb0605914f778feca9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e39cf90bd856443542b97933289749fca07476bf"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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