{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43462",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:56.010Z",
        "datePublished": "2026-05-08T14:22:24.686Z",
        "dateUpdated": "2026-08-05T12:28:06.464Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:28:06.464Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: spacemit: Fix error handling in emac_tx_mem_map()\n\nThe DMA mappings were leaked on mapping error. Free them with the\nexisting emac_free_tx_buf() function."
                }
            ],
            "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 vulnerable transmit path is reachable by network-driven egress traffic on a SpacemiT K1 system, such as routed packets or unauthenticated service responses that cause SKBs to be queued to this Ethernet device.\nAC:L - There is no race or precise timing requirement; an attacker can repeatedly drive fragmented TX traffic and resource pressure until a mid-packet DMA mapping failure exercises the buggy cleanup path.\nPR:N - In a network-facing or forwarding deployment, the attacker does not need local credentials or kernel capabilities to cause packets to be transmitted through the affected NIC.\nUI:N - No victim user action is required once the affected interface and service/forwarding path are active.\nS:U - The impact remains within the kernel/network device availability domain and does not cross a VM, IOMMU isolation, or sandbox security boundary.\nC:N - The confirmed bug is an orphaned DMA mapping/resource leak on TX mapping failure, with no demonstrated attacker-visible read primitive.\nI:N - The leaked DMA mappings are for TX buffers and the fix does not indicate an arbitrary write, data modification, or control-flow corruption primitive.\nA:H - Repeated leaks of DMA/IOMMU mapping resources can exhaust DMA resources and cause sustained transmit failure or complete network loss on the affected device."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/spacemit/k1_emac.c"
                    ],
                    "versions": [
                        {
                            "version": "bfec6d7f2001c7470c3cd261ae65a3ba8737f226",
                            "lessThan": "c34ebd7b24ea70be3c6fdb6936f79f593f37df60",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bfec6d7f2001c7470c3cd261ae65a3ba8737f226",
                            "lessThan": "edeaba385318f60ec1b32470da4d5eb800294d16",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bfec6d7f2001c7470c3cd261ae65a3ba8737f226",
                            "lessThan": "86292155bea578ebab0ca3b65d4d87ecd8a0e9ea",
                            "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/spacemit/k1_emac.c"
                    ],
                    "versions": [
                        {
                            "version": "6.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.18",
                            "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": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18",
                                    "versionEndExcluding": "6.18.19"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18",
                                    "versionEndExcluding": "6.19.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18",
                                    "versionEndExcluding": "7.0"
                                }
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                    ]
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/c34ebd7b24ea70be3c6fdb6936f79f593f37df60"
                },
                {
                    "url": "https://git.kernel.org/stable/c/edeaba385318f60ec1b32470da4d5eb800294d16"
                },
                {
                    "url": "https://git.kernel.org/stable/c/86292155bea578ebab0ca3b65d4d87ecd8a0e9ea"
                }
            ],
            "title": "net: spacemit: Fix error handling in emac_tx_mem_map()",
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    }
}