CVE-2024-42316

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However, this can result in underflow of\nnr_scanned, under a condition where shrink_folio_list() does not increment\nnr_scanned, i.e., when folio_trylock() fails.\n\nThe underflow can cause the divisor, i.e., scale=scanned+reclaimed in\nvmpressure_calc_level(), to become zero, resulting in the following crash:\n\n [exception RIP: vmpressure_work_fn+101]\n process_one_work at ffffffffa3313f2b\n\nSince scan_control->nr_scanned has no established semantics, the potential\ndouble counting has minimal risks. Therefore, fix the problem by not\ndeducting scan_control->nr_scanned in evict_folios()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/vmscan.c"], "versions": [{"version": "359a5e1416caaf9ce28396a65ed3e386cc5de663", "lessThan": "8de7bf77f21068a5f602bb1e59adbc5ab533509d", "status": "affected", "versionType": "git"}, {"version": "359a5e1416caaf9ce28396a65ed3e386cc5de663", "lessThan": "d6510f234c7d117790397f9bb150816b0a954a04", "status": "affected", "versionType": "git"}, {"version": "359a5e1416caaf9ce28396a65ed3e386cc5de663", "lessThan": "a39e38be632f0e1c908d70d1c9cd071c03faf895", "status": "affected", "versionType": "git"}, {"version": "359a5e1416caaf9ce28396a65ed3e386cc5de663", "lessThan": "8b671fe1a879923ecfb72dda6caf01460dd885ef", "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/vmscan.c"], "versions": [{"version": "6.1", "status": "affected"}, {"version": "0", "lessThan": "6.1", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.103", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.44", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.10.3", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11", "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": "6.1", "versionEndExcluding": "6.1.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.6.44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.10.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.11"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8de7bf77f21068a5f602bb1e59adbc5ab533509d"}, {"url": "https://git.kernel.org/stable/c/d6510f234c7d117790397f9bb150816b0a954a04"}, {"url": "https://git.kernel.org/stable/c/a39e38be632f0e1c908d70d1c9cd071c03faf895"}, {"url": "https://git.kernel.org/stable/c/8b671fe1a879923ecfb72dda6caf01460dd885ef"}], "title": "mm/mglru: fix div-by-zero in vmpressure_calc_level()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-42316", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:09:42.817559Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:33:26.476Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:04:35.769Z"}}]}}

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However, this can result in underflow of\nnr_scanned, under a condition where shrink_folio_list() does not increment\nnr_scanned, i.e., when folio_trylock() fails.\n\nThe underflow can cause the divisor, i.e., scale=scanned+reclaimed in\nvmpressure_calc_level(), to become zero, resulting in the following crash:\n\n [exception RIP: vmpressure_work_fn+101]\n process_one_work at ffffffffa3313f2b\n\nSince scan_control->nr_scanned has no established semantics, the potential\ndouble counting has minimal risks. Therefore, fix the problem by not\ndeducting scan_control->nr_scanned in evict_folios()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/mglru: corrige div-by-zero en vmpression_calc_level() evict_folios() utiliza una segunda pasada para recuperar las publicaciones que han pasado por la reescritura de p\u00e1ginas y quedan limpias antes de finalizar el primer pase, ya que folio_rotate_reclaimable() no puede manejar esos folios debido al aislamiento. El segundo paso intenta evitar un posible doble conteo deduciendo scan_control->nr_scanned. Sin embargo, esto puede resultar en un desbordamiento insuficiente de nr_scanned, bajo una condici\u00f3n en la que Shrink_folio_list() no incrementa nr_scanned, es decir, cuando falla folio_trylock(). El desbordamiento insuficiente puede causar que el divisor, es decir, escala=escaneado+reclamado en vmpression_calc_level(), se convierta en cero, lo que resulta en el siguiente bloqueo: [excepci\u00f3n RIP: vmpression_work_fn+101] Process_one_work en ffffffffa3313f2b Dado que scan_control->nr_scanned no tiene una sem\u00e1ntica establecida, la posible doble contabilizaci\u00f3n tiene riesgos m\u00ednimos. Por lo tanto, solucione el problema no deduciendo scan_control->nr_scanned en evict_folios()."}], "id": "CVE-2024-42316", "lastModified": "2026-06-17T07:49:14.770", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-42316", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T16:09:42.817559Z", "version": "2.0.3"}}]}, "published": "2024-08-17T09:15:11.547", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8b671fe1a879923ecfb72dda6caf01460dd885ef"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8de7bf77f21068a5f602bb1e59adbc5ab533509d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a39e38be632f0e1c908d70d1c9cd071c03faf895"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d6510f234c7d117790397f9bb150816b0a954a04"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-369"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2025:6966", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:6966", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}], "bugzilla": {"description": "kernel: mm/mglru: fix div-by-zero in vmpressure_calc_level()", "id": "2305461", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2305461"}, "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": "verified"}, "cwe": "CWE-369", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmm/mglru: fix div-by-zero in vmpressure_calc_level()\nevict_folios() uses a second pass to reclaim folios that have gone through\npage writeback and become clean before it finishes the first pass, since\nfolio_rotate_reclaimable() cannot handle those folios due to the\nisolation.\nThe second pass tries to avoid potential double counting by deducting\nscan_control->nr_scanned. However, this can result in underflow of\nnr_scanned, under a condition where shrink_folio_list() does not increment\nnr_scanned, i.e., when folio_trylock() fails.\nThe underflow can cause the divisor, i.e., scale=scanned+reclaimed in\nvmpressure_calc_level(), to become zero, resulting in the following crash:\n[exception RIP: vmpressure_work_fn+101]\nprocess_one_work at ffffffffa3313f2b\nSince scan_control->nr_scanned has no established semantics, the potential\ndouble counting has minimal risks. Therefore, fix the problem by not\ndeducting scan_control->nr_scanned in evict_folios()."], "name": "CVE-2024-42316", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-08-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-42316\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-42316\nhttps://lore.kernel.org/linux-cve-announce/2024081753-CVE-2024-42316-8b49@gregkh/T"], "threat_severity": "Moderate"}

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