{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-38193", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.993Z", "datePublished": "2025-07-04T13:37:17.285Z", "dateUpdated": "2026-05-11T21:23:02.816Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:23:02.816Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: sch_sfq: reject invalid perturb period\n\nGerrard Tai reported that SFQ perturb_period has no range check yet,\nand this can be used to trigger a race condition fixed in a separate patch.\n\nWe want to make sure ctl->perturb_period * HZ will not overflow\nand is positive.\n\n\ntc qd add dev lo root sfq perturb -10 # negative value : error\nError: sch_sfq: invalid perturb 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Gerrard Tai inform\u00f3 que SFQ perturb_period a\u00fan no tiene comprobaci\u00f3n de rango, lo que puede usarse para activar una condici\u00f3n de ejecuci\u00f3n corregida en un parche independiente. Queremos asegurarnos de que ctl->perturb_period * HZ no se desborde y sea positivo. tc qd add dev lo root sfq perturb -10 # valor negativo: error. Error: sch_sfq: per\u00edodo de perturbaci\u00f3n no v\u00e1lido. tc qd add dev lo root sfq perturb 100000000 # demasiado grande: error. Error: sch_sfq: per\u00edodo de perturbaci\u00f3n no v\u00e1lido. tc qd add dev lo root sfq perturb 2000000 # valor aceptable tc -s -d qd sh dev lo qdisc sfq 8005: root refcnt 2 limit 127p quantum 64Kb Depth 127 flows 128 divisor 1024 perturb 2000000sec Enviados 0 bytes 0 paquete (eliminados 0, sobrepasa los l\u00edmites 0, vuelve a poner en cola 0) backlog 0b 0p vuelve a poner en cola 0"}], "id": "CVE-2025-38193", "lastModified": "2025-12-18T21:25:10.723", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-07-04T14:15:26.403", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0357da9149eac621f39e235a135ebf155f01f7c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2254d038dab9c194fe6a4b1ce31034f42e91a6e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/590b2d7d0beadba2aa576708a05a05f0aae39295"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7ca52541c05c832d32b112274f81a985101f9ba8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/956b5aebb349449b38d920d444ca1392d43719d1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b11a50544af691b787384089b68f740ae20a441b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e0936ff56be4e08ad5b60ec26971eae0c40af305"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f9b97d466e6026ccbdda30bb5b71965b67ccbc82"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net_sched: sch_sfq: reject invalid perturb period", "id": "2376414", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2376414"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet_sched: sch_sfq: reject invalid perturb period\nGerrard Tai reported that SFQ perturb_period has no range check yet,\nand this can be used to trigger a race condition fixed in a separate patch.\nWe want to make sure ctl->perturb_period * HZ will not overflow\nand is positive.\ntc qd add dev lo root sfq perturb -10 # negative value : error\nError: sch_sfq: invalid perturb period.\ntc qd add dev lo root sfq perturb 1000000000 # too big : error\nError: sch_sfq: invalid perturb period.\ntc qd add dev lo root sfq perturb 2000000 # acceptable value\ntc -s -d qd sh dev lo\nqdisc sfq 8005: root refcnt 2 limit 127p quantum 64Kb depth 127 flows 128 divisor 1024 perturb 2000000sec\nSent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)\nbacklog 0b 0p requeues 0"], "name": "CVE-2025-38193", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-07-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38193\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38193\nhttps://lore.kernel.org/linux-cve-announce/2025070415-CVE-2025-38193-0fb1@gregkh/T"], "threat_severity": "Important"}

{"created": "2025-07-13T21:47:50.755033+00:00", "updated": "2025-07-13T21:47:50.755087+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}