{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43441",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:56.009Z",
        "datePublished": "2026-05-08T14:22:09.982Z",
        "dateUpdated": "2026-08-05T12:27:57.945Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:27:57.945Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bonding: Fix nd_tbl NULL dereference when IPv6 is disabled\n\nWhen booting with the 'ipv6.disable=1' parameter, the nd_tbl is never\ninitialized because inet6_init() exits before ndisc_init() is called\nwhich initializes it. If bonding ARP/NS validation is enabled, an IPv6\nNS/NA packet received on a slave can reach bond_validate_na(), which\ncalls bond_has_this_ip6(). That path calls ipv6_chk_addr() and can\ncrash in __ipv6_chk_addr_and_flags().\n\n BUG: kernel NULL pointer dereference, address: 00000000000005d8\n Oops: Oops: 0000 [#1] SMP NOPTI\n RIP: 0010:__ipv6_chk_addr_and_flags+0x69/0x170\n Call Trace:\n  <IRQ>\n  ipv6_chk_addr+0x1f/0x30\n  bond_validate_na+0x12e/0x1d0 [bonding]\n  ? __pfx_bond_handle_frame+0x10/0x10 [bonding]\n  bond_rcv_validate+0x1a0/0x450 [bonding]\n  bond_handle_frame+0x5e/0x290 [bonding]\n  ? srso_alias_return_thunk+0x5/0xfbef5\n  __netif_receive_skb_core.constprop.0+0x3e8/0xe50\n  ? srso_alias_return_thunk+0x5/0xfbef5\n  ? update_cfs_rq_load_avg+0x1a/0x240\n  ? srso_alias_return_thunk+0x5/0xfbef5\n  ? __enqueue_entity+0x5e/0x240\n  __netif_receive_skb_one_core+0x39/0xa0\n  process_backlog+0x9c/0x150\n  __napi_poll+0x30/0x200\n  ? srso_alias_return_thunk+0x5/0xfbef5\n  net_rx_action+0x338/0x3b0\n  handle_softirqs+0xc9/0x2a0\n  do_softirq+0x42/0x60\n  </IRQ>\n  <TASK>\n  __local_bh_enable_ip+0x62/0x70\n  __dev_queue_xmit+0x2d3/0x1000\n  ? srso_alias_return_thunk+0x5/0xfbef5\n  ? srso_alias_return_thunk+0x5/0xfbef5\n  ? packet_parse_headers+0x10a/0x1a0\n  packet_sendmsg+0x10da/0x1700\n  ? kick_pool+0x5f/0x140\n  ? srso_alias_return_thunk+0x5/0xfbef5\n  ? __queue_work+0x12d/0x4f0\n  __sys_sendto+0x1f3/0x220\n  __x64_sys_sendto+0x24/0x30\n  do_syscall_64+0x101/0xf80\n  ? exc_page_fault+0x6e/0x170\n  ? srso_alias_return_thunk+0x5/0xfbef5\n  entry_SYSCALL_64_after_hwframe+0x77/0x7f\n  </TASK>\n\nFix this by checking ipv6_mod_enabled() before dispatching IPv6 packets to\nbond_na_rcv(). If IPv6 is disabled, return early from bond_rcv_validate()\nand avoid the path to ipv6_chk_addr()."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - A crafted IPv6 ICMPv6 NS/NA packet received on a bonding slave reaches the vulnerable receive path through the kernel networking stack. No local execution on the target is required once the vulnerable bonding configuration is present.\nAC:L - The trigger is deterministic: with IPv6 boot-disabled and bonding ARP/NS validation enabled, a matching IPv6 NS/NA frame reaches the unchecked path. There is no race, heap grooming, or timing requirement.\nPR:N - The packet receive path has no authentication or target-side privilege check. Bond configuration requires administration, but an attacker sending the triggering network frame does not need credentials on the victim.\nUI:N - No victim user action is needed after the vulnerable system is configured and receiving traffic. The attacker only needs to send the crafted packet.\nS:U - The impact is within the same kernel/host security authority. This is not a VM escape, sandbox boundary crossing, or IOMMU/DMA boundary bypass.\nC:N - The bug is a NULL pointer dereference in the IPv6 address/neighbor initialization path. It does not expose kernel memory or provide a read primitive.\nI:N - The issue is a pure NULL dereference, not memory corruption or an arbitrary write. There is no evidence of data modification or control-flow hijack capability.\nA:H - The NULL dereference occurs in the receive softirq path and produces a kernel oops/panic-class crash. It can be retriggered by sending additional crafted packets to the vulnerable configuration."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/bonding/bond_main.c"
                    ],
                    "versions": [
                        {
                            "version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
                            "lessThan": "49dbfcb70eca5f6f9043594e1e323c74c39e3863",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
                            "lessThan": "cf6099ef493b94e140b0fad52482a78853115318",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
                            "lessThan": "c78f01abe535853f13f0b26cd5b1d2f19bf52e2f",
                            "status": "affected",
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                        },
                        {
                            "version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
                            "lessThan": "95faa1459b83fa544191e82ccc73856f03b7741f",
                            "status": "affected",
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                        {
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                            "lessThan": "c9c238066fb254dabf65e27379f93c56112c5b96",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
                            "lessThan": "30021e969d48e5819d5ae56936c2f34c0f7ce997",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/bonding/bond_main.c"
                    ],
                    "versions": [
                        {
                            "version": "5.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.167",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.130",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.78",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.19",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.9",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/49dbfcb70eca5f6f9043594e1e323c74c39e3863"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cf6099ef493b94e140b0fad52482a78853115318"
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                    "url": "https://git.kernel.org/stable/c/95faa1459b83fa544191e82ccc73856f03b7741f"
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                    "url": "https://git.kernel.org/stable/c/c9c238066fb254dabf65e27379f93c56112c5b96"
                },
                {
                    "url": "https://git.kernel.org/stable/c/30021e969d48e5819d5ae56936c2f34c0f7ce997"
                }
            ],
            "title": "net: bonding: Fix nd_tbl NULL dereference when IPv6 is disabled",
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}