CVE-2025-39788

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Shifting by more than that width results in\nundefined behaviour.\n\nFix this by switching to the BIT() macro, which applies correct type\ncasting as required. This ensures the correct value is written to\nUTRL_NEXUS_TYPE (0xffffffff on gs101), and it also fixes a UBSAN shift\nwarning:\n\n UBSAN: shift-out-of-bounds in drivers/ufs/host/ufs-exynos.c:1113:21\n shift exponent 32 is too large for 32-bit type 'int'\n\nFor consistency, apply the same change to the nutmrs / UTMRL_NEXUS_TYPE\nwrite."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/ufs/host/ufs-exynos.c"], "versions": [{"version": "55f4b1f73631a0817717fe6e98517de51b4c3527", "lessThan": "01510a9e8222f11cce064410f3c2fcf0756c0a08", "status": "affected", "versionType": "git"}, {"version": "55f4b1f73631a0817717fe6e98517de51b4c3527", "lessThan": "098b2c8ee208c77126839047b9e6e1925bb35baa", "status": "affected", "versionType": "git"}, {"version": "55f4b1f73631a0817717fe6e98517de51b4c3527", "lessThan": "c1f025da8f370a015e412b55cbcc583f91de8316", "status": 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"https://git.kernel.org/stable/c/098b2c8ee208c77126839047b9e6e1925bb35baa"}, {"url": "https://git.kernel.org/stable/c/c1f025da8f370a015e412b55cbcc583f91de8316"}, {"url": "https://git.kernel.org/stable/c/6d53b2a134da77eb7fe65c5c7c7a3c193539a78a"}, {"url": "https://git.kernel.org/stable/c/dc8fb963742f1a38d284946638f9358bdaa0ddee"}, {"url": "https://git.kernel.org/stable/c/5b9f1ef293428ea9c0871d96fcec2a87c4445832"}, {"url": "https://git.kernel.org/stable/c/01aad16c2257ab8ff33b152b972c9f2e1af47912"}], "title": "scsi: ufs: exynos: Fix programming of HCI_UTRL_NEXUS_TYPE", "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"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:43:23.201Z"}}, {"x_adpType": "supplier", 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{}

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Shifting by more than that width results in\nundefined behaviour.\n\nFix this by switching to the BIT() macro, which applies correct type\ncasting as required. This ensures the correct value is written to\nUTRL_NEXUS_TYPE (0xffffffff on gs101), and it also fixes a UBSAN shift\nwarning:\n\n UBSAN: shift-out-of-bounds in drivers/ufs/host/ufs-exynos.c:1113:21\n shift exponent 32 is too large for 32-bit type 'int'\n\nFor consistency, apply the same change to the nutmrs / UTMRL_NEXUS_TYPE\nwrite."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nscsi: ufs: exynos: Correcci\u00f3n de la programaci\u00f3n de HCI_UTRL_NEXUS_TYPE\n\nEn Google gs101, el n\u00famero de ranuras de solicitud de transferencia UTP (nutrs) es 32, y en este caso el controlador termina programando el UTRL_NEXUS_TYPE incorrectamente como 0.\n\nEsto se debe a que el lado izquierdo del desplazamiento es 1, que es de tipo int, es decir, de 31 bits de ancho. Desplazar por m\u00e1s de ese ancho resulta en comportamiento indefinido.\n\nSolucione esto cambiando a la macro BIT(), que aplica la conversi\u00f3n de tipo correcta seg\u00fan sea necesario. Esto asegura que el valor correcto se escriba en UTRL_NEXUS_TYPE (0xffffffff en gs101), y tambi\u00e9n corrige una advertencia de desplazamiento de UBSAN:\n\n UBSAN: desplazamiento fuera de l\u00edmites en drivers/ufs/host/ufs-exynos.c:1113:21 el exponente de desplazamiento 32 es demasiado grande para el tipo 'int' de 32 bits\n\nPara mantener la coherencia, aplique el mismo cambio a la escritura de nutmrs / UTMRL_NEXUS_TYPE."}], "id": "CVE-2025-39788", "lastModified": "2026-10-19T21:10:00.160", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-09-11T17:15:45.070", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/01510a9e8222f11cce064410f3c2fcf0756c0a08"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/01aad16c2257ab8ff33b152b972c9f2e1af47912"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/098b2c8ee208c77126839047b9e6e1925bb35baa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5b9f1ef293428ea9c0871d96fcec2a87c4445832"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6d53b2a134da77eb7fe65c5c7c7a3c193539a78a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c1f025da8f370a015e412b55cbcc583f91de8316"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dc8fb963742f1a38d284946638f9358bdaa0ddee"}, {"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"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: scsi: ufs: exynos: Fix programming of HCI_UTRL_NEXUS_TYPE", "id": "2394652", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2394652"}, "csaw": false, "details": ["No description is available for this CVE."], "name": "CVE-2025-39788", "public_date": "2025-09-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-39788\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-39788\nhttps://git.kernel.org/stable/c/01510a9e8222f11cce064410f3c2fcf0756c0a08\nhttps://git.kernel.org/stable/c/01aad16c2257ab8ff33b152b972c9f2e1af47912\nhttps://git.kernel.org/stable/c/098b2c8ee208c77126839047b9e6e1925bb35baa\nhttps://git.kernel.org/stable/c/5b9f1ef293428ea9c0871d96fcec2a87c4445832\nhttps://git.kernel.org/stable/c/6d53b2a134da77eb7fe65c5c7c7a3c193539a78a\nhttps://git.kernel.org/stable/c/c1f025da8f370a015e412b55cbcc583f91de8316\nhttps://git.kernel.org/stable/c/dc8fb963742f1a38d284946638f9358bdaa0ddee"], "threat_severity": "Moderate"}

{"created": "2025-09-12T08:02:48.144677+00:00", "updated": "2025-09-12T08:02:48.144724+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}