{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-52937",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.370Z",
        "datePublished": "2026-06-24T07:14:27.305Z",
        "dateUpdated": "2026-06-24T07:14:27.305Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-24T07:14:27.305Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR\n\nIn the SIOCGIFHWADDR path, tap_ioctl() copies 16 bytes of an\nuninitialised on-stack struct sockaddr_storage to userspace via\nifr_hwaddr, but netif_get_mac_address() only writes sa_family and\ndev->addr_len (6 for Ethernet) bytes, leaving sa_data[6..13] uninitialised.\n\nThose 8 trailing bytes leak kernel stack contents; SIOCGIFHWADDR on a\nmacvtap chardev returns kernel .text and direct-map pointers, defeating\nKASLR.\n\nInitialise ss at declaration."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/tap.c"
                    ],
                    "versions": [
                        {
                            "version": "3b23a32a63219f51a5298bc55a65ecee866e79d0",
                            "lessThan": "719007c3492f0f1f9e9cdbed8ac45ba45bb13eeb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3b23a32a63219f51a5298bc55a65ecee866e79d0",
                            "lessThan": "05305e832be7b9d65b2b72caacf7d850b3942b2a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3b23a32a63219f51a5298bc55a65ecee866e79d0",
                            "lessThan": "bddc09212c24934643bd44fc794748d2bbb3b6cd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "176188cff67ec1aa55103647b61d02315cc38e98",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1fc205d9e400f069ebf30d3faa6ec2bab2cbd7b4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4d0ae760c02c98fc78b78d3a0509896bc648ad1c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.4.103",
                            "lessThan": "5.5",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.21",
                            "lessThan": "5.11",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.11.4",
                            "lessThan": "5.12",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/tap.c"
                    ],
                    "versions": [
                        {
                            "version": "5.12",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.12",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.34",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.11",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "5.12",
                                    "versionEndExcluding": "6.18.34"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "7.0.11"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "7.1"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10.21"
                                },
                                {
                                    "vulnerable": true,
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                                    "versionStartIncluding": "5.11.4"
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/719007c3492f0f1f9e9cdbed8ac45ba45bb13eeb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/05305e832be7b9d65b2b72caacf7d850b3942b2a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bddc09212c24934643bd44fc794748d2bbb3b6cd"
                }
            ],
            "title": "tap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR",
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}