CVE-2026-23451 (GCVE-0-2026-23451)
Vulnerability from cvelistv5
Published
2026-04-03 15:15
Modified
2026-08-05 12:21
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: bonding: prevent potential infinite loop in bond_header_parse() bond_header_parse() can loop if a stack of two bonding devices is setup, because skb->dev always points to the hierarchy top. Add new "const struct net_device *dev" parameter to (struct header_ops)->parse() method to make sure the recursion is bounded, and that the final leaf parse method is called.
References
Impacted products
Vendor Product Version
Linux Linux Version: 5d0fb9806ab6cf2c3cfba0e1b8c701da65e25af8
Version: 9baf26a91565b7bb2b1d9f99aaf884a2b28c2f6d
Version: 6ac890f1d60ac3707ee8dae15a67d9a833e49956
Version: 95597d11dc8bddb2b9a051c9232000bfbb5e43ba
Version: 950803f7254721c1c15858fbbfae3deaaeeecb11
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   Linux Linux Version: 6.18.19   ≤
Version: 6.19.9   ≤
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/firewire/net.c",
            "drivers/net/bonding/bond_main.c",
            "include/linux/etherdevice.h",
            "include/linux/if_ether.h",
            "include/linux/netdevice.h",
            "net/ethernet/eth.c",
            "net/ipv4/ip_gre.c",
            "net/mac802154/iface.c",
            "net/phonet/af_phonet.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9532d0d0ad1d726c06f807e8f0f1ec93cbabb452",
              "status": "affected",
              "version": "5d0fb9806ab6cf2c3cfba0e1b8c701da65e25af8",
              "versionType": "git"
            },
            {
              "lessThan": "946bb6cacf0ccada7bc80f1cfa07c1ed79511c1c",
              "status": "affected",
              "version": "9baf26a91565b7bb2b1d9f99aaf884a2b28c2f6d",
              "versionType": "git"
            },
            {
              "lessThan": "4172a7901cf43fe1cc63ef7a2ef33735ff7b7d13",
              "status": "affected",
              "version": "6ac890f1d60ac3707ee8dae15a67d9a833e49956",
              "versionType": "git"
            },
            {
              "lessThan": "9b49c854f14f5e2d493e562a1e28d2e57fe37371",
              "status": "affected",
              "version": "95597d11dc8bddb2b9a051c9232000bfbb5e43ba",
              "versionType": "git"
            },
            {
              "lessThan": "b7405dcf7385445e10821777143f18c3ce20fa04",
              "status": "affected",
              "version": "950803f7254721c1c15858fbbfae3deaaeeecb11",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/firewire/net.c",
            "drivers/net/bonding/bond_main.c",
            "include/linux/etherdevice.h",
            "include/linux/if_ether.h",
            "include/linux/netdevice.h",
            "net/ethernet/eth.c",
            "net/ipv4/ip_gre.c",
            "net/mac802154/iface.c",
            "net/phonet/af_phonet.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6.18.20",
              "status": "affected",
              "version": "6.18.19",
              "versionType": "semver"
            },
            {
              "lessThan": "6.19.10",
              "status": "affected",
              "version": "6.19.9",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.20",
                  "versionStartIncluding": "6.18.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.10",
                  "versionStartIncluding": "6.19.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: prevent potential infinite loop in bond_header_parse()\n\nbond_header_parse() can loop if a stack of two bonding devices is setup,\nbecause skb-\u003edev always points to the hierarchy top.\n\nAdd new \"const struct net_device *dev\" parameter to\n(struct header_ops)-\u003eparse() method to make sure the recursion\nis bounded, and that the final leaf parse method is called."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - In a reasonable affected deployment, a remote peer can send a packet, including GRE traffic, that arrives through a stacked bonding hierarchy and triggers AF_PACKET/NFLOG/NFQUEUE hardware-address parsing on the top bond. The vulnerable code is reached from network packet receive processing, not from a physical or purely local-only interface.\nAC:L - Once the stacked bond and packet metadata consumer exist, a single matching received packet deterministically enters `dev_parse_header()` and recurses indefinitely. There is no race, timing window, heap shaping, or attacker-uncontrolled probabilistic condition needed to trigger the denial of service.\nPR:N - The network-triggered path does not require the remote attacker to authenticate or hold local privileges; they only need to send traffic to the affected interface/tunnel. Although local namespace users can also create a reproducer with CAP_NET_ADMIN/CAP_NET_RAW in their namespace, the highest reasonable scenario requires no attacker privileges.\nUI:N - No victim action is required at exploit time when the affected bond stack and packet logging/capture path are already active. The packet alone triggers the vulnerable parse path.\nS:U - The impact remains within the kernel/networking security authority of the vulnerable system. There is no VM escape, sandbox boundary crossing, or separate security scope affected.\nC:N - The bug is an unbounded recursive call caused by using the top-level `skb-\u003edev`; it does not create an information disclosure or controlled read primitive.\nI:N - The vulnerable path does not corrupt attacker-selected data or provide a write/control-flow primitive; the final lower-device parser is never reached. The observed consequence is recursion leading to denial of service.\nA:H - The infinite recursion can hang kernel packet processing and lead to stack overflow/lockdep exhaustion or kernel crash. This is a high availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:21:51.936Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9532d0d0ad1d726c06f807e8f0f1ec93cbabb452"
        },
        {
          "url": "https://git.kernel.org/stable/c/946bb6cacf0ccada7bc80f1cfa07c1ed79511c1c"
        },
        {
          "url": "https://git.kernel.org/stable/c/4172a7901cf43fe1cc63ef7a2ef33735ff7b7d13"
        },
        {
          "url": "https://git.kernel.org/stable/c/9b49c854f14f5e2d493e562a1e28d2e57fe37371"
        },
        {
          "url": "https://git.kernel.org/stable/c/b7405dcf7385445e10821777143f18c3ce20fa04"
        }
      ],
      "title": "bonding: prevent potential infinite loop in bond_header_parse()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23451",
    "datePublished": "2026-04-03T15:15:33.776Z",
    "dateReserved": "2026-01-13T15:37:46.020Z",
    "dateUpdated": "2026-08-05T12:21:51.936Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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