CVE-2025-38092

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-38092", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.983Z", "datePublished": "2025-07-02T14:43:30.776Z", "dateUpdated": "2026-08-05T11:59:27.724Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:59:27.724Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: use list_first_entry_or_null for opinfo_get_list()\n\nThe list_first_entry() macro never returns NULL. If the list is\nempty then it returns an invalid pointer. Use list_first_entry_or_null()\nto check if the list is empty."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - ksmbd is the in-kernel SMB server; the vulnerable path is driven entirely by remote SMB2 CREATE, LOCK and CLOSE requests arriving on TCP/445 from a remote client. No local access is required.\nAC:L - The attacker controls both sides of the race by issuing concurrent SMB2 CREATE/LOCK and CLOSE requests on multiple connections against the same file, and the window is actively widened because down_read() in opinfo_get_list() blocks behind the racing opinfo_del() down_write() that empties the list.\nPR:L - Reaching smb_grant_oplock()/smb_break_all_oplock() requires an established SMB2 session, a tree connect and open file handles, so a valid (even low-privilege or guest-mapped) SMB account is needed; this is not a pre-authentication code path.\nUI:N - The attacker drives every step from its own SMB connections \u2014 opening handles with oplocks/leases and closing them concurrently. No action by any other user or administrator is needed.\nS:U - The type confusion corrupts kernel heap memory belonging to the ksmbd subsystem within the same kernel security authority; no VM, IOMMU or sandbox boundary is crossed.\nC:H - The fake oplock_info causes reads through attacker-timed wild pointers \u2014 opinfo->conn resolves to an rwsem waiter on another task's kernel stack and o_lease to an arbitrary kernel pointer \u2014 and such heap type confusion is leverageable into arbitrary kernel memory disclosure.\nI:H - atomic_inc_not_zero() performs a real RMW write onto the upper half of ksmbd_inode->m_hash.pprev, corrupting a kernel pointer that hlist_del_init() later writes through, and follow-on oplock_break()/opinfo_put() paths add out-of-bounds wait-queue list writes and kfree() of interior pointers \u2014 classic type confusion promotable to a write primitive.\nA:H - Dereferencing and atomically modifying a bogus pointer derived from the list head, plus spinlock/wait-queue operations past the end of the kmalloc'd ksmbd_inode, reliably produce slab corruption, oops or panic, taking down the file server host."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/server/oplock.c"], "versions": [{"version": "296cb5457cc6f4a754c4ae29855f8a253d52bcc6", "lessThan": "c78abb646ff823e7d22faad4cc0703d4484da9e8", "status": "affected", "versionType": "git"}, {"version": "d54ab1520d43e95f9b2e22d7a05fc9614192e5a5", "lessThan": "334da674b25fdb7a1a4d4b89dcd7795144fc7e11", "status": "affected", "versionType": "git"}, {"version": "d73686367ad68534257cd88a36ca3c52cb8b81d8", "lessThan": "cb7e06e9736d73007dc8dab7b353733bb37df86b", "status": "affected", "versionType": "git"}, {"version": "18b4fac5ef17f77fed9417d22210ceafd6525fc7", "lessThan": "10379171f346e6f61d30d9949500a8de4336444a", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/server/oplock.c"], "versions": [{"version": "6.6.88", "lessThan": "6.6.93", "status": "affected", "versionType": "semver"}, {"version": "6.12.25", "lessThan": "6.12.32", "status": "affected", "versionType": "semver"}, {"version": "6.14.4", "lessThan": "6.14.10", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.88", "versionEndExcluding": "6.6.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.25", "versionEndExcluding": "6.12.32"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14.4", "versionEndExcluding": "6.14.10"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c78abb646ff823e7d22faad4cc0703d4484da9e8"}, {"url": "https://git.kernel.org/stable/c/334da674b25fdb7a1a4d4b89dcd7795144fc7e11"}, {"url": "https://git.kernel.org/stable/c/cb7e06e9736d73007dc8dab7b353733bb37df86b"}, {"url": "https://git.kernel.org/stable/c/10379171f346e6f61d30d9949500a8de4336444a"}], "title": "ksmbd: use list_first_entry_or_null for opinfo_get_list()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/server/oplock.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c78abb646ff823e7d22faad4cc0703d4484da9e8", "status": "affected", "version": "296cb5457cc6f4a754c4ae29855f8a253d52bcc6", "versionType": "git"}, {"lessThan": "334da674b25fdb7a1a4d4b89dcd7795144fc7e11", "status": "affected", "version": "d54ab1520d43e95f9b2e22d7a05fc9614192e5a5", "versionType": "git"}, {"lessThan": "cb7e06e9736d73007dc8dab7b353733bb37df86b", "status": "affected", "version": "d73686367ad68534257cd88a36ca3c52cb8b81d8", "versionType": "git"}, {"lessThan": "10379171f346e6f61d30d9949500a8de4336444a", "status": "affected", "version": "18b4fac5ef17f77fed9417d22210ceafd6525fc7", "versionType": "git"}]}, {"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/server/oplock.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6.6.93", "status": "affected", "version": "6.6.88", "versionType": "semver"}, {"lessThan": "6.12.32", "status": "affected", "version": "6.12.25", "versionType": "semver"}, {"lessThan": "6.14.10", "status": "affected", "version": "6.14.4", "versionType": "semver"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F54AB024-7562-4452-93AE-645798E55BC9", "versionEndExcluding": "6.6.93", "versionStartIncluding": "6.6.88", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "832CC9EC-F0C4-4B47-9980-86D9414763B6", "versionEndExcluding": "6.12.32", "versionStartIncluding": "6.12.25", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B5929498-4B70-40E7-98F4-40F6F0D68158", "versionEndExcluding": "6.14.10", "versionStartIncluding": "6.14.4", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*", "matchCriteriaId": "13FC0DDE-E513-465E-9E81-515702D49B74", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*", "matchCriteriaId": "8C7B5B0E-4EEB-48F5-B4CF-0935A7633845", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:*", "matchCriteriaId": "2D240580-3048-49B2-9E27-F115A9DF8224", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc6:*:*:*:*:*:*", "matchCriteriaId": "90320558-E553-4EF5-8A0B-0F5D20113BD2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc7:*:*:*:*:*:*", "matchCriteriaId": "C300BA32-5854-4B59-A00A-18A402F291D0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: use list_first_entry_or_null for opinfo_get_list()\n\nThe list_first_entry() macro never returns NULL. If the list is\nempty then it returns an invalid pointer. Use list_first_entry_or_null()\nto check if the list is empty."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: usar list_first_entry_or_null para opinfo_get_list(). La macro list_first_entry() nunca devuelve NULL. Si la lista est\u00e1 vac\u00eda, devuelve un puntero no v\u00e1lido. Use list_first_entry_or_null() para comprobar si la lista est\u00e1 vac\u00eda."}], "id": "CVE-2025-38092", "lastModified": "2026-07-30T06:22:50.317", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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": "2025-07-02T15:15:26.197", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/10379171f346e6f61d30d9949500a8de4336444a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/334da674b25fdb7a1a4d4b89dcd7795144fc7e11"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c78abb646ff823e7d22faad4cc0703d4484da9e8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cb7e06e9736d73007dc8dab7b353733bb37df86b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ksmbd: use list_first_entry_or_null for opinfo_get_list()", "id": "2375920", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2375920"}, "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:\nksmbd: use list_first_entry_or_null for opinfo_get_list()\nThe list_first_entry() macro never returns NULL. If the list is\nempty then it returns an invalid pointer. Use list_first_entry_or_null()\nto check if the list is empty."], "name": "CVE-2025-38092", "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": "2025-07-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38092\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38092\nhttps://lore.kernel.org/linux-cve-announce/2025070237-CVE-2025-38092-70a8@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-06T22:16:24.349502+00:00", "updated": "2025-07-06T22:16:24.349651+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}