159 lines
9.0 KiB
JSON
159 lines
9.0 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-2026-74741",
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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": "2026-08-15T05:44:03.930Z",
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"datePublished": "2026-08-26T14:36:52.937Z",
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"dateUpdated": "2026-08-27T05:01:01.751Z"
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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": "2026-08-27T05:01:01.751Z"
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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: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling\n\nIn non-MSI-X mode (such as legacy INTx or single MSI), wx->msix_entry is\nnot allocated or initialized. Calling NGBE_INTR_MISC(wx) dereferences\nwx->msix_entry->entry, leading to a NULL pointer dereference crash.\n\nThis issue was introduced by fixing the IRQ vector when the number of\nVFs is 7. Fix the issue by explicitly checking `pdev->msix_enabled` to\ndetermine the correct vector index.\n\nAdditionally, as a side fix, set the interrupt mask to BIT(0) for the\nnon-MSI-X fallback. In MSI/INTx mode, the MISC and queue interrupts\nshare vector 0, and the WX_PX_MISC_IVAR register is only valid in the\nMSI-X case. Thus, BIT(0) is the correct mask for the miscellaneous cause\nwhen MSI-X is disabled."
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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 - The NULL dereference is in ngbe_intr(), the MSI/INTx hard-IRQ handler reached when the Wangxun ngbe NIC raises an interrupt from wire activity (RX/TX completion, link, or misc events); a remote peer sending traffic to an up interface drives this path with no local access.\nAC:L - After the 4174c0c regression every non-MSI-X interrupt that reaches ngbe_irq_enable(wx,false) deterministically dereferences NULL msix_entry; MSI/INTx fallback is automatic on MSI-X allocation failure, VMs, and pci=nomsi, and each packet reliably retriggers the fault.\nPR:N - No credentials or capabilities are needed on the target once the netdev is up; received frames are handled in hardirq before any socket, netfilter, or authentication gate, so any host that can send packets to the interface can trigger the crash.\nUI:N - Interrupt delivery and the faulty re-enable run automatically in hardirq context on normal NIC operation; no administrator or end-user action beyond the interface already being configured up at boot is required.\nS:U - The oops is confined to kernel hardirq context within the same security authority; it is not a VM escape, hypervisor bypass, IOMMU violation, or sandbox boundary crossing.\nC:N - The fault is a NULL read of wx->msix_entry->entry while computing an interrupt mask; execution aborts immediately with no out-of-bounds read, use-after-free, or data returned to the attacker.\nI:N - This is a pure NULL pointer read, not memory corruption; no attacker-controlled write, heap spray, or control-flow hijack primitive exists before the kernel faults.\nA:H - The NULL dereference occurs in hardirq context and causes a kernel oops or panic, fully denying availability; on internet-facing servers with ngbe in MSI/INTx mode an unauthenticated remote attacker can repeat the crash on every interrupt."
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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/ethernet/wangxun/ngbe/ngbe_main.c"
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],
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"versions": [
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{
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"version": "4174c0c331a2aa3322d3b3be532808deb041b37d",
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"lessThan": "cef4c5b9aca24651d069adf9462b221df6a2a669",
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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": "4174c0c331a2aa3322d3b3be532808deb041b37d",
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"lessThan": "0ab482b2195edc000262f0eae1cdcb416b8f335d",
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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": "4174c0c331a2aa3322d3b3be532808deb041b37d",
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"lessThan": "5f3a13e0bb5ebcc1ca2dfda42ea40b9f3c2be6ea",
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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/ethernet/wangxun/ngbe/ngbe_main.c"
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],
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"versions": [
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{
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"version": "6.16",
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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": "6.16",
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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": "6.18.46",
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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": "7.1.10",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "6.16",
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"versionEndExcluding": "6.18.46"
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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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"versionStartIncluding": "6.16",
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"versionEndExcluding": "7.1.10"
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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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"versionStartIncluding": "6.16",
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"versionEndExcluding": "7.2"
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}
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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/cef4c5b9aca24651d069adf9462b221df6a2a669"
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},
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{
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"url": "https://git.kernel.org/stable/c/0ab482b2195edc000262f0eae1cdcb416b8f335d"
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},
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{
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"url": "https://git.kernel.org/stable/c/5f3a13e0bb5ebcc1ca2dfda42ea40b9f3c2be6ea"
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}
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],
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"title": "net: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling",
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"x_generator": {
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} |