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https://github.com/fkie-cad/nvd-json-data-feeds.git
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117 lines
5.2 KiB
JSON
117 lines
5.2 KiB
JSON
{
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"id": "CVE-2024-42316",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2024-08-17T09:15:11.547",
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"lastModified": "2024-08-22T15:52:38.520",
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"vulnStatus": "Analyzed",
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"cveTags": [],
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/mglru: fix div-by-zero in vmpressure_calc_level()\n\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.\n\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.\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()."
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},
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{
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"lang": "es",
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"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()."
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}
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],
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"metrics": {
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"cvssMetricV31": [
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{
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"source": "nvd@nist.gov",
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"type": "Primary",
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"cvssData": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 5.5,
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"baseSeverity": "MEDIUM",
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"attackVector": "LOCAL",
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"attackComplexity": "LOW",
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"privilegesRequired": "LOW",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"availabilityImpact": "HIGH"
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},
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"exploitabilityScore": 1.8,
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"impactScore": 3.6
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}
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]
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},
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"weaknesses": [
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{
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"source": "nvd@nist.gov",
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"type": "Primary",
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"description": [
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{
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"lang": "en",
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"value": "CWE-369"
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}
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]
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}
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],
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"configurations": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.1",
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"versionEndExcluding": "6.1.103",
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"matchCriteriaId": "81F7EA03-5805-43D2-9A78-820250B70B32"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.2",
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"versionEndExcluding": "6.6.44",
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"matchCriteriaId": "CC912330-6B41-4C6B-99AF-F3857FBACB6A"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.7",
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"versionEndExcluding": "6.10.3",
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"matchCriteriaId": "92D388F2-1EAF-4CFA-AC06-5B26D762EA7D"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/8b671fe1a879923ecfb72dda6caf01460dd885ef",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"tags": [
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"Patch"
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]
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},
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{
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"url": "https://git.kernel.org/stable/c/8de7bf77f21068a5f602bb1e59adbc5ab533509d",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"tags": [
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"Patch"
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]
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},
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{
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"url": "https://git.kernel.org/stable/c/a39e38be632f0e1c908d70d1c9cd071c03faf895",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"tags": [
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"Patch"
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]
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},
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{
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"url": "https://git.kernel.org/stable/c/d6510f234c7d117790397f9bb150816b0a954a04",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"tags": [
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"Patch"
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]
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}
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]
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} |