CVE-2025-38325

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This patch add free_transport ops in ksmbd\nconnection, and add each free_transports for tcp and smbdirect."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable teardown path belongs to ksmbd's in-kernel SMB Direct transport, whose RDMA CM listener accepts connections from remote peers on port 445 (InfiniBand) / 5445 (iWARP), and is reachable over routable IP via iWARP/RoCEv2 or software providers (siw/rxe). No local access is needed \u2014 a remote peer triggers it by establishing and dropping an SMB Direct connection.\nAC:L - The type confusion is deterministic \u2014 every SMB Direct connection teardown funnels through ksmbd_conn_free() \u2192 ksmbd_free_transport() and fabricates a socket pointer from the status/full_packet_received bytes, with no race or memory-layout precondition. The premature-free variant simply requires holding an oplock/lease at disconnect time, which the attacker fully controls.\nPR:N - Connection setup and teardown happen entirely before SMB2 SESSION_SETUP: the error path in smb_direct_handle_connect_request() and the normal ksmbd_conn_handler_loop() exit both call free_transport() with no credentials verified. An unauthenticated peer that connects and disconnects triggers the confused free.\nUI:N - The attacker drives the entire sequence by opening and closing an SMB Direct connection; no action by any local user or administrator is required beyond ksmbd already serving SMB Direct.\nS:U - The corruption is confined to kernel memory managed by the ksmbd server within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The type confusion plus the unconditional kfree(t) in the RDMA free_transport() leave conn->transport dangling and double-free the slab object, giving a use-after-free on a large kmalloc allocation that an attacker can reclaim and read back through ksmbd_conn_write()/rdma_read paths, which is leverageable for arbitrary kernel memory disclosure.\nI:H - This is a genuine type confusion combined with a double free and a use-after-free whose reuse ends in an indirect call through freed memory (conn->transport->ops->writev in __smb2_lease_break_noti()), a direct control-flow hijack primitive once the freed object is groomed.\nA:H - Every SMB Direct teardown calls sock_release() on a fabricated pointer built from the status enum, producing a guaranteed kernel oops that kills the ksmbd kthread and leaks its RDMA resources, and panics outright on panic_on_oops configurations common in appliances and embedded deployments."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/server/connection.c", "fs/smb/server/connection.h", "fs/smb/server/transport_rdma.c", "fs/smb/server/transport_tcp.c"], "versions": [{"version": "1da8bd9a10ecd718692732294d15fd801c0eabb5", "lessThan": "52f5a52dc17a4a7b4363ac03fe2c4ef26f020dc6", "status": "affected", "versionType": "git"}, {"version": "1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e", "lessThan": "3890da762a66191c440b0bd6e3ee45501edbb0c1", "status": "affected", "versionType": "git"}, {"version": "21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de", "lessThan": "3f3aae77280aad9f5acc6709c596148966f765c7", "status": "affected", "versionType": "git"}, {"version": "21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de", "lessThan": "a89f5fae998bdc4d0505306f93844c9ae059d50c", "status": "affected", "versionType": "git"}, {"version": "e59796fc80603bcd8569d4d2e10b213c1918edb4", "status": "affected", "versionType": "git"}, {"version": "6.12.26", "lessThan": "6.12.35", "status": "affected", "versionType": "semver"}, {"version": "6.14.4", "lessThan": "6.15", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/server/connection.c", "fs/smb/server/connection.h", "fs/smb/server/transport_rdma.c", "fs/smb/server/transport_tcp.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.35", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15.4", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16", "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": "6.12.26", "versionEndExcluding": "6.12.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.15.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/52f5a52dc17a4a7b4363ac03fe2c4ef26f020dc6"}, {"url": "https://git.kernel.org/stable/c/3890da762a66191c440b0bd6e3ee45501edbb0c1"}, {"url": "https://git.kernel.org/stable/c/3f3aae77280aad9f5acc6709c596148966f765c7"}, {"url": "https://git.kernel.org/stable/c/a89f5fae998bdc4d0505306f93844c9ae059d50c"}], "title": "ksmbd: add free_transport ops in ksmbd connection", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/server/connection.c", "fs/smb/server/connection.h", "fs/smb/server/transport_rdma.c", "fs/smb/server/transport_tcp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "52f5a52dc17a4a7b4363ac03fe2c4ef26f020dc6", "status": "affected", "version": "1da8bd9a10ecd718692732294d15fd801c0eabb5", "versionType": "git"}, {"lessThan": "3890da762a66191c440b0bd6e3ee45501edbb0c1", "status": "affected", "version": "1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e", "versionType": "git"}, {"lessThan": "3f3aae77280aad9f5acc6709c596148966f765c7", "status": "affected", "version": "21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de", "versionType": "git"}, {"lessThan": "a89f5fae998bdc4d0505306f93844c9ae059d50c", "status": "affected", "version": "21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de", "versionType": "git"}, {"status": "affected", "version": "e59796fc80603bcd8569d4d2e10b213c1918edb4", "versionType": "git"}, {"lessThan": "6.12.35", "status": "affected", "version": "6.12.26", "versionType": "semver"}, {"lessThan": "6.15", "status": "affected", "version": "6.14.4", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/server/connection.c", "fs/smb/server/connection.h", "fs/smb/server/transport_rdma.c", "fs/smb/server/transport_tcp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"lessThan": "6.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.35", "versionType": "semver"}, {"lessThanOrEqual": "6.15.*", "status": "unaffected", "version": "6.15.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.16", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2CF54BB0-98BB-46E4-BD08-42BCA79598B4", "versionEndExcluding": "6.12.35", "versionStartIncluding": "6.12.26", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "786E593C-5048-4AE0-9421-71BE44AB6058", "versionEndExcluding": "6.15", "versionStartIncluding": "6.14.4", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BC343CA8-C054-44E4-830F-78CCA31461E8", "versionEndExcluding": "6.15.4", "versionStartIncluding": "6.15.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:-:*:*:*:*:*:*", "matchCriteriaId": "A1ECC65A-EE37-4479-8E99-4BB68A22A31F", "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}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*", "matchCriteriaId": "6D4894DB-CCFE-4602-B1BF-3960B2E19A01", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*", "matchCriteriaId": "09709862-E348-4378-8632-5A7813EDDC86", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: add free_transport ops in ksmbd connection\n\nfree_transport function for tcp connection can be called from smbdirect.\nIt will cause kernel oops. This patch add free_transport ops in ksmbd\nconnection, and add each free_transports for tcp and smbdirect."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: se a\u00f1aden operaciones free_transport en la conexi\u00f3n ksmbd. La funci\u00f3n free_transport para la conexi\u00f3n TCP se puede llamar desde smbdirect. Esto provoca errores en el kernel. Este parche a\u00f1ade operaciones free_transport en la conexi\u00f3n ksmbd y a\u00f1ade free_transport tanto para TCP como para smbdirect."}], "id": "CVE-2025-38325", "lastModified": "2026-07-30T06:23:07.353", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "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": "2025-07-10T09:15:26.673", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3890da762a66191c440b0bd6e3ee45501edbb0c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3f3aae77280aad9f5acc6709c596148966f765c7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/52f5a52dc17a4a7b4363ac03fe2c4ef26f020dc6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a89f5fae998bdc4d0505306f93844c9ae059d50c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ksmbd: add free_transport ops in ksmbd connection", "id": "2379255", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2379255"}, "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": ["No description is available for this CVE."], "name": "CVE-2025-38325", "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": "2025-07-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38325\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38325\nhttps://lore.kernel.org/linux-cve-announce/2025071032-CVE-2025-38325-9f7c@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-13T11:06:38.475529+00:00", "updated": "2025-07-13T11:06:38.475592+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}