{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43089",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:55.984Z",
        "datePublished": "2026-05-06T07:40:22.630Z",
        "dateUpdated": "2026-06-01T16:14:29.152Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-01T16:14:29.152Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_mapping()\n\nstruct xfrm_usersa_id has a one-byte padding hole after the proto\nfield, which ends up never getting set to zero before copying out to\nuserspace.  Fix that up by zeroing out the whole structure before\nsetting individual variables."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/xfrm/xfrm_user.c"
                    ],
                    "versions": [
                        {
                            "version": "3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4",
                            "lessThan": "521385cbd50ca9474396d88462fcdfa6489685d9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4",
                            "lessThan": "c2779ae9a3e5a044e5ccd564681511bbbcc5fc0f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4",
                            "lessThan": "72a8de41c3eb4dcf22bf3b674ea38fb2f75d6f32",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4",
                            "lessThan": "d3125c541a96fb3c0fc7210112684baf22b6c24d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4",
                            "lessThan": "5a1a4b049ddde41466ccac0daeec326254b133f2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4",
                            "lessThan": "f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4",
                            "lessThan": "700c9622b23c33b5933e6dcea816492c064e4e10",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4",
                            "lessThan": "1beb76b2053b68c491b78370794b8ff63c8f8c02",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/xfrm/xfrm_user.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.29",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.29",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.258",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.209",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.175",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.136",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.83",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.24",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.14",
                            "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": "2.6.29",
                                    "versionEndExcluding": "5.10.258"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.29",
                                    "versionEndExcluding": "5.15.209"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.29",
                                    "versionEndExcluding": "6.6.136"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.29",
                                    "versionEndExcluding": "6.12.83"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.29",
                                    "versionEndExcluding": "7.0"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/521385cbd50ca9474396d88462fcdfa6489685d9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c2779ae9a3e5a044e5ccd564681511bbbcc5fc0f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/72a8de41c3eb4dcf22bf3b674ea38fb2f75d6f32"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02"
                }
            ],
            "title": "xfrm_user: fix info leak in build_mapping()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}