{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-38657", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.030Z", "datePublished": "2025-08-22T16:01:00.512Z", "dateUpdated": "2025-09-29T05:55:38.043Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-29T05:55:38.043Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: mcc: prevent shift wrapping in rtw89_core_mlsr_switch()\n\nThe \"link_id\" value comes from the user via debugfs. If it's larger\nthan BITS_PER_LONG then that would result in shift wrapping and\npotentially an out of bounds access later. In fact, we can limit it\nto IEEE80211_MLD_MAX_NUM_LINKS (15).\n\nFortunately, only root can write to debugfs files so the security\nimpact is minimal."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/realtek/rtw89/core.c"], "versions": [{"version": "9dd85e739ce0765f022014c3e0713e1007d7ef60", "lessThan": "417cfa9cc44fbe6bceab786f9a4ee5a210f1288e", "status": "affected", "versionType": "git"}, {"version": "9dd85e739ce0765f022014c3e0713e1007d7ef60", "lessThan": "53cf488927a0f79968f9c03c4d1e00d2a79731c3", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/realtek/rtw89/core.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.1", "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": "6.16", "versionEndExcluding": "6.16.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.17"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/417cfa9cc44fbe6bceab786f9a4ee5a210f1288e"}, {"url": "https://git.kernel.org/stable/c/53cf488927a0f79968f9c03c4d1e00d2a79731c3"}], "title": "wifi: rtw89: mcc: prevent shift wrapping in rtw89_core_mlsr_switch()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:*:*:*:*:*:*:*", "matchCriteriaId": "D6BFC4F7-7099-4420-AF39-DD1CEABB8DF9", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: mcc: prevent shift wrapping in rtw89_core_mlsr_switch()\n\nThe \"link_id\" value comes from the user via debugfs. If it's larger\nthan BITS_PER_LONG then that would result in shift wrapping and\npotentially an out of bounds access later. In fact, we can limit it\nto IEEE80211_MLD_MAX_NUM_LINKS (15).\n\nFortunately, only root can write to debugfs files so the security\nimpact is minimal."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: rtw89: mcc: impide el ajuste de turnos en rtw89_core_mlsr_switch(). El valor \"link_id\" proviene del usuario a trav\u00e9s de debugfs. Si es mayor que BITS_PER_LONG, esto provocar\u00eda un ajuste de turnos y, potencialmente, un acceso fuera de los l\u00edmites posteriormente. De hecho, podemos limitarlo a IEEE80211_MLD_MAX_NUM_LINKS (15). Afortunadamente, solo el usuario root puede escribir en archivos de debugfs, por lo que el impacto en la seguridad es m\u00ednimo."}], "id": "CVE-2025-38657", "lastModified": "2025-11-26T16:32:18.817", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "[email protected]", "type": "Primary"}]}, "published": "2025-08-22T16:15:40.777", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/417cfa9cc44fbe6bceab786f9a4ee5a210f1288e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/53cf488927a0f79968f9c03c4d1e00d2a79731c3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: wifi: rtw89: mcc: prevent shift wrapping in rtw89_core_mlsr_switch()", "id": "2390373", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2390373"}, "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:\nwifi: rtw89: mcc: prevent shift wrapping in rtw89_core_mlsr_switch()\nThe \"link_id\" value comes from the user via debugfs. If it's larger\nthan BITS_PER_LONG then that would result in shift wrapping and\npotentially an out of bounds access later. In fact, we can limit it\nto IEEE80211_MLD_MAX_NUM_LINKS (15).\nFortunately, only root can write to debugfs files so the security\nimpact is minimal."], "name": "CVE-2025-38657", "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"}], "public_date": "2025-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38657\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38657\nhttps://lore.kernel.org/linux-cve-announce/2025082239-CVE-2025-38657-87b3@gregkh/T"], "threat_severity": "Moderate"}