CVE-2026-74741

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74741", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.930Z", "datePublished": "2026-08-26T14:36:52.937Z", "dateUpdated": "2026-08-27T05:01:01.751Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-27T05:01:01.751Z"}, "descriptions": [{"lang": "en", "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."}], "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 - 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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/wangxun/ngbe/ngbe_main.c"], "versions": [{"version": "4174c0c331a2aa3322d3b3be532808deb041b37d", "lessThan": "cef4c5b9aca24651d069adf9462b221df6a2a669", "status": "affected", "versionType": "git"}, {"version": "4174c0c331a2aa3322d3b3be532808deb041b37d", "lessThan": "0ab482b2195edc000262f0eae1cdcb416b8f335d", "status": "affected", "versionType": "git"}, {"version": "4174c0c331a2aa3322d3b3be532808deb041b37d", "lessThan": "5f3a13e0bb5ebcc1ca2dfda42ea40b9f3c2be6ea", "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/ethernet/wangxun/ngbe/ngbe_main.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.46", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.10", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.18.46"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.1.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/cef4c5b9aca24651d069adf9462b221df6a2a669"}, {"url": "https://git.kernel.org/stable/c/0ab482b2195edc000262f0eae1cdcb416b8f335d"}, {"url": "https://git.kernel.org/stable/c/5f3a13e0bb5ebcc1ca2dfda42ea40b9f3c2be6ea"}], "title": "net: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/wangxun/ngbe/ngbe_main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "cef4c5b9aca24651d069adf9462b221df6a2a669", "status": "affected", "version": "4174c0c331a2aa3322d3b3be532808deb041b37d", "versionType": "git"}, {"lessThan": "0ab482b2195edc000262f0eae1cdcb416b8f335d", "status": "affected", "version": "4174c0c331a2aa3322d3b3be532808deb041b37d", "versionType": "git"}, {"lessThan": "5f3a13e0bb5ebcc1ca2dfda42ea40b9f3c2be6ea", "status": "affected", "version": "4174c0c331a2aa3322d3b3be532808deb041b37d", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/wangxun/ngbe/ngbe_main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"lessThan": "6.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.46", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\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."}], "id": "CVE-2026-74741", "lastModified": "2026-08-27T06:17:23.583", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-26T15:16:52.867", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0ab482b2195edc000262f0eae1cdcb416b8f335d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5f3a13e0bb5ebcc1ca2dfda42ea40b9f3c2be6ea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cef4c5b9aca24651d069adf9462b221df6a2a669"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling", "id": "2524476", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2524476"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling\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.\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.\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.", "A flaw was found in the Linux kernel's ngbe network driver. In systems configured for non-MSI-X interrupt handling, such as legacy INTx or single MSI modes, a missing initialization of a pointer can lead to a NULL pointer dereference. This vulnerability can cause the system to crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-74741", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74741\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74741\nhttps://lore.kernel.org/linux-cve-announce/2026082657-CVE-2026-74741-6e2b@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4174c0c331a2aa3322d3b3be532808deb041b37d,cef4c5b9aca24651d069adf9462b221df6a2a669)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4174c0c331a2aa3322d3b3be532808deb041b37d,0ab482b2195edc000262f0eae1cdcb416b8f335d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4174c0c331a2aa3322d3b3be532808deb041b37d,5f3a13e0bb5ebcc1ca2dfda42ea40b9f3c2be6ea)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.46,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.10,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-26T15:30:05.170536+00:00", "updated": "2026-08-27T11:00:06.301480+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476"]}