{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53624",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-10-07T15:16:59.655Z",
        "datePublished": "2025-10-07T15:19:29.545Z",
        "dateUpdated": "2026-05-11T19:48:45.406Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:48:45.406Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_fq: fix integer overflow of \"credit\"\n\nif sch_fq is configured with \"initial quantum\" having values greater than\nINT_MAX, the first assignment of \"credit\" does signed integer overflow to\na very negative value.\nIn this situation, the syzkaller script provided by Cristoph triggers the\nCPU soft-lockup warning even with few sockets. It's not an infinite loop,\nbut \"credit\" wasn't probably meant to be minus 2Gb for each new flow.\nCapping \"initial quantum\" to INT_MAX proved to fix the issue.\n\nv2: validation of \"initial quantum\" is done in fq_policy, instead of open\n    coding in fq_change() _ suggested by Jakub Kicinski"
                }
            ],
            "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.c",
                        "tools/testing/selftests/tc-testing/tc-tests/qdiscs/fq.json"
                    ],
                    "versions": [
                        {
                            "version": "afe4fd062416b158a8a8538b23adc1930a9b88dc",
                            "lessThan": "4b8a05e3801661a0438fcd0cdef181030d966a5a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afe4fd062416b158a8a8538b23adc1930a9b88dc",
                            "lessThan": "d0b43125ec892aeb1b03e5df5aab595097da225a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afe4fd062416b158a8a8538b23adc1930a9b88dc",
                            "lessThan": "4fbefeab88c6e79753a25099d455d3d59d2946b4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afe4fd062416b158a8a8538b23adc1930a9b88dc",
                            "lessThan": "85f24cb2f10b2b0f2882e5786a09b4790bb3a0ad",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afe4fd062416b158a8a8538b23adc1930a9b88dc",
                            "lessThan": "2322462d6f9ad4874f4e3c63df3b5cc00cb1acbd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afe4fd062416b158a8a8538b23adc1930a9b88dc",
                            "lessThan": "7041101ff6c3073fd8f2e99920f535b111c929cb",
                            "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.c",
                        "tools/testing/selftests/tc-testing/tc-tests/qdiscs/fq.json"
                    ],
                    "versions": [
                        {
                            "version": "3.12",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.12",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.180",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.111",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.28",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2.15",
                            "lessThanOrEqual": "6.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.3.2",
                            "lessThanOrEqual": "6.3.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4",
                            "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": "3.12",
                                    "versionEndExcluding": "5.10.180"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.12",
                                    "versionEndExcluding": "5.15.111"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.12",
                                    "versionEndExcluding": "6.1.28"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.12",
                                    "versionEndExcluding": "6.2.15"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.12",
                                    "versionEndExcluding": "6.3.2"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.12",
                                    "versionEndExcluding": "6.4"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/4b8a05e3801661a0438fcd0cdef181030d966a5a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d0b43125ec892aeb1b03e5df5aab595097da225a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4fbefeab88c6e79753a25099d455d3d59d2946b4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/85f24cb2f10b2b0f2882e5786a09b4790bb3a0ad"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2322462d6f9ad4874f4e3c63df3b5cc00cb1acbd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7041101ff6c3073fd8f2e99920f535b111c929cb"
                }
            ],
            "title": "net/sched: sch_fq: fix integer overflow of \"credit\"",
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}