268 lines
15 KiB
JSON
268 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-43441",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-05-01T14:12:56.009Z",
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"datePublished": "2026-05-08T14:22:09.982Z",
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"dateUpdated": "2026-10-19T19:26:36.805Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:27:57.945Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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()."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/bonding/bond_main.c"
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],
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"versions": [
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{
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"version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
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"lessThan": "49dbfcb70eca5f6f9043594e1e323c74c39e3863",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
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"lessThan": "cf6099ef493b94e140b0fad52482a78853115318",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
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"lessThan": "c78f01abe535853f13f0b26cd5b1d2f19bf52e2f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
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"lessThan": "95faa1459b83fa544191e82ccc73856f03b7741f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
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"lessThan": "c9c238066fb254dabf65e27379f93c56112c5b96",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
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"lessThan": "30021e969d48e5819d5ae56936c2f34c0f7ce997",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/bonding/bond_main.c"
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],
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"versions": [
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{
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"version": "5.18",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.18",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.167",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.130",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.78",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.19",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.19.9",
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"lessThanOrEqual": "6.19.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.0",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.18",
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"versionEndExcluding": "6.1.167"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.18",
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.18",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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}
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/49dbfcb70eca5f6f9043594e1e323c74c39e3863"
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},
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{
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"url": "https://git.kernel.org/stable/c/cf6099ef493b94e140b0fad52482a78853115318"
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},
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{
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"url": "https://git.kernel.org/stable/c/c78f01abe535853f13f0b26cd5b1d2f19bf52e2f"
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},
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{
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"url": "https://git.kernel.org/stable/c/95faa1459b83fa544191e82ccc73856f03b7741f"
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},
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{
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"url": "https://git.kernel.org/stable/c/c9c238066fb254dabf65e27379f93c56112c5b96"
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},
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{
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"url": "https://git.kernel.org/stable/c/30021e969d48e5819d5ae56936c2f34c0f7ce997"
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}
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],
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"title": "net: bonding: Fix nd_tbl NULL dereference when IPv6 is disabled",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-43441",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:17:24.934773Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-476",
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"description": "CWE-476 NULL Pointer Dereference"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T19:26:36.805Z"
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}
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}
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]
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}
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} |