{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-90074",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.785Z",
        "datePublished": "2026-09-17T16:05:54.214Z",
        "dateUpdated": "2026-10-19T08:57:31.165Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:57:31.165Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fq_pie: clamp default quantum to avoid signed overflow\n\nfq_pie_init() sets q->quantum = psched_mtu(qdisc_dev(sch)) without\nclamping. A device with a huge MTU (e.g. dummy with max_mtu == 0\naccepting MTU 2147483634) makes psched_mtu() return 0x80000000, which\noverflows the signed flow->deficit to INT_MIN in fq_pie_qdisc_dequeue(),\ncausing an infinite loop and soft lockup. Emulate fq_pie_policy which\nis already bounded to [1, 1 << 20]; clamp the default to [256, 1 << 20].\n256 matches fq_codel's floor and is a sane minimum for a DRR quantum.\n\nConditions to recreate the bug: a device whose MTU (plus\nhard_header_len) wraps psched_mtu() into the sign bit (e.g. a dummy\ndevice with max_mtu == 0 accepting MTU 2147483634). Requires\nCAP_NET_ADMIN in a user namespace."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sched/sch_fq_pie.c"
                    ],
                    "versions": [
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "1f43e4dbc93b7d02761a024d5f895df823c07b72",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "f7942b2693bc24c7d609a03d06f97bee3b0bd96a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "6f1be05faecef4c0f9a008200209f66ef2e133f7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "435da3734a8e63d3067016accc977ed1d10aaaa0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "44dad8fe99b58a7fe2961e9eec6a5f07ace5b51f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "044fa2498bbc2900f0c48a6ef2fdd5b2bdfc3795",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "bf97fd2163ad1191ef8daa3d4df8372aee19e396",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "c86cd7ed0b0e44779a3d1683f03e4353baf4bdc9",
                            "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/sch_fq_pie.c"
                    ],
                    "versions": [
                        {
                            "version": "5.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.6",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.270",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "5.6",
                                    "versionEndExcluding": "5.10.270"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "5.15.221"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.1.188"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.12.110"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.18.52"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "7.2.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/1f43e4dbc93b7d02761a024d5f895df823c07b72"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f7942b2693bc24c7d609a03d06f97bee3b0bd96a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6f1be05faecef4c0f9a008200209f66ef2e133f7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/435da3734a8e63d3067016accc977ed1d10aaaa0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/44dad8fe99b58a7fe2961e9eec6a5f07ace5b51f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/044fa2498bbc2900f0c48a6ef2fdd5b2bdfc3795"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bf97fd2163ad1191ef8daa3d4df8372aee19e396"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c86cd7ed0b0e44779a3d1683f03e4353baf4bdc9"
                }
            ],
            "title": "net/sched: fq_pie: clamp default quantum to avoid signed overflow",
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}