{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74290",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-15T05:44:03.881Z",
        "datePublished": "2026-08-15T05:57:57.004Z",
        "dateUpdated": "2026-08-17T05:16:36.420Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T05:16:36.420Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: cls_flow: Dont expose folded kernel pointers\n\nThe flow classifier falls back to addr_fold() for fields that are missing\nfrom packet headers. In map mode, userspace controls mask, xor, rshift,\naddend and divisor, and can observe the resulting classid through class\nstatistics. This allows a tc classifier in a user/network namespace to\nrecover the 32-bit folded value of skb->sk, skb_dst() or skb_nfct().\n\nAlign with standard kernel practices for pointer hashing and replace the\nXOR folding with a keyed siphash (which is cryptographically secure)"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sched/cls_flow.c"
                    ],
                    "versions": [
                        {
                            "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe",
                            "lessThan": "19f2ecf8ea564562c7e7a919cf38068dd9aa1c96",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe",
                            "lessThan": "3d054001860270748405a3f9270c5fa0bf7ffc19",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe",
                            "lessThan": "fb31fbe51c233f3bf47021121f63d2e42cac2d08",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe",
                            "lessThan": "0a8b5b74f0e6b6b9ce453bcfa4baa502c4c7577a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe",
                            "lessThan": "6151159618198675e01c391676e579738286c135",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe",
                            "lessThan": "f294fc71c4a0fa4964f6428a1b4e7929c1d83125",
                            "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/sched/cls_flow.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.25",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.25",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.178",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.145",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.97",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.40",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "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": "2.6.25",
                                    "versionEndExcluding": "6.1.178"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.25",
                                    "versionEndExcluding": "6.6.145"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.25",
                                    "versionEndExcluding": "6.12.97"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.25",
                                    "versionEndExcluding": "6.18.40"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.25",
                                    "versionEndExcluding": "7.1.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.25",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/19f2ecf8ea564562c7e7a919cf38068dd9aa1c96"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3d054001860270748405a3f9270c5fa0bf7ffc19"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fb31fbe51c233f3bf47021121f63d2e42cac2d08"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0a8b5b74f0e6b6b9ce453bcfa4baa502c4c7577a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6151159618198675e01c391676e579738286c135"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f294fc71c4a0fa4964f6428a1b4e7929c1d83125"
                }
            ],
            "title": "net/sched: cls_flow: Dont expose folded kernel pointers",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}