CVE-2025-39909

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Fix it by directly returning -EINVAL\nwhen such a case occurs. Additionally, since 'aggr_interval' is already\nrequired to be set no smaller than 'sample_interval' in damon_set_attrs(),\nonly the case where 'sample_interval' is zero needs to be checked."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/damon/lru_sort.c"], "versions": [{"version": "40e983cca9274e177bd5b9379299b44d9536ac68", "lessThan": "74e391f7da7d9d5235a3cca88ee9fc18f720c75b", "status": "affected", "versionType": "git"}, {"version": "40e983cca9274e177bd5b9379299b44d9536ac68", "lessThan": "7bb675c9f0257840d33e5d1337d7e3afdd74a6bf", "status": "affected", "versionType": "git"}, {"version": "40e983cca9274e177bd5b9379299b44d9536ac68", "lessThan": "af0ae62b935317bed1a1361c8c9579db9d300e70", "status": "affected", "versionType": "git"}, {"version": "40e983cca9274e177bd5b9379299b44d9536ac68", "lessThan": "326a4b3750c71af3f3c52399ec4dbe33b6da4c26", "status": "affected", "versionType": "git"}, {"version": "40e983cca9274e177bd5b9379299b44d9536ac68", "lessThan": "711f19dfd783ffb37ca4324388b9c4cb87e71363", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/damon/lru_sort.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.153", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.107", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.48", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.8", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17", "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": "6.0", "versionEndExcluding": "6.1.153"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.107"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.48"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.16.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.17"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/74e391f7da7d9d5235a3cca88ee9fc18f720c75b"}, {"url": "https://git.kernel.org/stable/c/7bb675c9f0257840d33e5d1337d7e3afdd74a6bf"}, {"url": "https://git.kernel.org/stable/c/af0ae62b935317bed1a1361c8c9579db9d300e70"}, {"url": "https://git.kernel.org/stable/c/326a4b3750c71af3f3c52399ec4dbe33b6da4c26"}, {"url": "https://git.kernel.org/stable/c/711f19dfd783ffb37ca4324388b9c4cb87e71363"}], "title": "mm/damon/lru_sort: avoid divide-by-zero in damon_lru_sort_apply_parameters()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:44:35.076Z"}}]}}

{}

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Fix it by directly returning -EINVAL\nwhen such a case occurs. Additionally, since 'aggr_interval' is already\nrequired to be set no smaller than 'sample_interval' in damon_set_attrs(),\nonly the case where 'sample_interval' is zero needs to be checked."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmm/damon/lru_sort: evitar divisi\u00f3n por cero en damon_lru_sort_apply_parameters()\n\nSerie de parches 'mm/damon: evitar divisi\u00f3n por cero en la aplicaci\u00f3n de par\u00e1metros del m\u00f3dulo DAMON'.\n\nLos m\u00f3dulos RECLAIM y LRU_SORT de DAMON no realizan validaci\u00f3n sobre los par\u00e1metros configurados por el usuario durante la aplicaci\u00f3n, lo que puede llevar a errores de divisi\u00f3n por cero.\n\nEvitar la divisi\u00f3n por cero a\u00f1adiendo comprobaciones de validaci\u00f3n cuando los m\u00f3dulos DAMON intentan aplicar los par\u00e1metros.\n\nEste parche (de 2):\n\nDurante el c\u00e1lculo de 'hot_thres' y 'cold_thres', se utiliza 'sample_interval' o 'aggr_interval' como divisor, lo que puede llevar a errores de divisi\u00f3n por cero. Solucionarlo devolviendo directamente -EINVAL cuando ocurre tal caso. Adem\u00e1s, dado que ya se requiere que 'aggr_interval' se establezca no menor que 'sample_interval' en damon_set_attrs(), solo el caso en que 'sample_interval' es cero necesita ser comprobado."}], "id": "CVE-2025-39909", "lastModified": "2026-10-19T21:10:00.160", "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": "2025-10-01T08:15:33.850", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/326a4b3750c71af3f3c52399ec4dbe33b6da4c26"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/711f19dfd783ffb37ca4324388b9c4cb87e71363"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/74e391f7da7d9d5235a3cca88ee9fc18f720c75b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7bb675c9f0257840d33e5d1337d7e3afdd74a6bf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/af0ae62b935317bed1a1361c8c9579db9d300e70"}, {"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-369"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: mm/damon/lru_sort: avoid divide-by-zero in damon_lru_sort_apply_parameters()", "id": "2400613", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2400613"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmm/damon/lru_sort: avoid divide-by-zero in damon_lru_sort_apply_parameters()\nPatch series \"mm/damon: avoid divide-by-zero in DAMON module's parameters\napplication\".\nDAMON's RECLAIM and LRU_SORT modules perform no validation on\nuser-configured parameters during application, which may lead to\ndivision-by-zero errors.\nAvoid the divide-by-zero by adding validation checks when DAMON modules\nattempt to apply the parameters.\nThis patch (of 2):\nDuring the calculation of 'hot_thres' and 'cold_thres', either\n'sample_interval' or 'aggr_interval' is used as the divisor, which may\nlead to division-by-zero errors. Fix it by directly returning -EINVAL\nwhen such a case occurs. Additionally, since 'aggr_interval' is already\nrequired to be set no smaller than 'sample_interval' in damon_set_attrs(),\nonly the case where 'sample_interval' is zero needs to be checked."], "name": "CVE-2025-39909", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhivos:1", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-39909\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-39909\nhttps://lore.kernel.org/linux-cve-announce/2025100109-CVE-2025-39909-202c@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-10-02T08:40:14.571655+00:00", "updated": "2025-10-02T08:40:14.571704+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}