{"api_version":"1","generated_at":"2026-07-23T13:01:03+00:00","cve":"CVE-2025-38700","urls":{"html":"https://cve.report/CVE-2025-38700","api":"https://cve.report/api/cve/CVE-2025-38700.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-38700","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-38700"},"summary":{"title":"scsi: libiscsi: Initialize iscsi_conn->dd_data only if memory is allocated","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi: Initialize iscsi_conn->dd_data only if memory is allocated\n\nIn case of an ib_fast_reg_mr allocation failure during iSER setup, the\nmachine hits a panic because iscsi_conn->dd_data is initialized\nunconditionally, even when no memory is allocated (dd_size == 0).  This\nleads invalid pointer dereference during connection teardown.\n\nFix by setting iscsi_conn->dd_data only if memory is actually allocated.\n\nPanic trace:\n------------\n iser: iser_create_fastreg_desc: Failed to allocate ib_fast_reg_mr err=-12\n iser: iser_alloc_rx_descriptors: failed allocating rx descriptors / data buffers\n BUG: unable to handle page fault for address: fffffffffffffff8\n RIP: 0010:swake_up_locked.part.5+0xa/0x40\n Call Trace:\n  complete+0x31/0x40\n  iscsi_iser_conn_stop+0x88/0xb0 [ib_iser]\n  iscsi_stop_conn+0x66/0xc0 [scsi_transport_iscsi]\n  iscsi_if_stop_conn+0x14a/0x150 [scsi_transport_iscsi]\n  iscsi_if_rx+0x1135/0x1834 [scsi_transport_iscsi]\n  ? netlink_lookup+0x12f/0x1b0\n  ? netlink_deliver_tap+0x2c/0x200\n  netlink_unicast+0x1ab/0x280\n  netlink_sendmsg+0x257/0x4f0\n  ? _copy_from_user+0x29/0x60\n  sock_sendmsg+0x5f/0x70","state":"PUBLISHED","assigner":"Linux","published_at":"2025-09-04 16:15:38","updated_at":"2026-05-12 13:16:59"},"problem_types":["CWE-476"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/2b242ea14386a510010eabfbfc3ce81a101f3802","name":"https://git.kernel.org/stable/c/2b242ea14386a510010eabfbfc3ce81a101f3802","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3ea3a256ed81f95ab0f3281a0e234b01a9cae605","name":"https://git.kernel.org/stable/c/3ea3a256ed81f95ab0f3281a0e234b01a9cae605","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","name":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing 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the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi: Initialize iscsi_conn->dd_data only if memory is allocated\n\nIn case of an ib_fast_reg_mr allocation failure during iSER setup, the\nmachine hits a panic because iscsi_conn->dd_data is initialized\nunconditionally, even when no memory is allocated (dd_size == 0).  This\nleads invalid pointer dereference during connection teardown.\n\nFix by setting iscsi_conn->dd_data only if memory is actually allocated.\n\nPanic trace:\n------------\n iser: iser_create_fastreg_desc: Failed to allocate ib_fast_reg_mr err=-12\n iser: iser_alloc_rx_descriptors: failed allocating rx descriptors / data buffers\n BUG: unable to handle page fault for address: fffffffffffffff8\n RIP: 0010:swake_up_locked.part.5+0xa/0x40\n Call Trace:\n  complete+0x31/0x40\n  iscsi_iser_conn_stop+0x88/0xb0 [ib_iser]\n  iscsi_stop_conn+0x66/0xc0 [scsi_transport_iscsi]\n  iscsi_if_stop_conn+0x14a/0x150 [scsi_transport_iscsi]\n  iscsi_if_rx+0x1135/0x1834 [scsi_transport_iscsi]\n  ? netlink_lookup+0x12f/0x1b0\n  ? netlink_deliver_tap+0x2c/0x200\n  netlink_unicast+0x1ab/0x280\n  netlink_sendmsg+0x257/0x4f0\n  ? _copy_from_user+0x29/0x60\n  sock_sendmsg+0x5f/0x70"}],"providerMetadata":{"dateUpdated":"2026-05-11T21:33:17.792Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f53af99f441ee79599d8df6113a7144d74cf9153"},{"url":"https://git.kernel.org/stable/c/9ea6d961566c7d762ed0204b06db05756fdda3b6"},{"url":"https://git.kernel.org/stable/c/fd5aad080edb501ab5c84b7623d612d0e3033403"},{"url":"https://git.kernel.org/stable/c/a145c269dc5380c063a20a0db7e6df2995962e9d"},{"url":"https://git.kernel.org/stable/c/66a373f50b4249d57f5a88c7be9676f9d5884865"},{"url":"https://git.kernel.org/stable/c/35782c32528d82aa21f84cb5ceb2abd3526a8159"},{"url":"https://git.kernel.org/stable/c/a33d42b7fc24fe03f239fbb0880dd5b4b4b97c19"},{"url":"https://git.kernel.org/stable/c/2b242ea14386a510010eabfbfc3ce81a101f3802"},{"url":"https://git.kernel.org/stable/c/3ea3a256ed81f95ab0f3281a0e234b01a9cae605"}],"title":"scsi: libiscsi: Initialize iscsi_conn->dd_data only if memory is allocated","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2025-38700","datePublished":"2025-09-04T15:32:52.241Z","dateReserved":"2025-04-16T04:51:24.032Z","dateUpdated":"2026-05-12T12:05:37.822Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-09-04 16:15:38","lastModifiedDate":"2026-05-12 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libiscsi: Initialize iscsi_conn->dd_data only if memory is","CVE":"CVE-2025-38700","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"38700","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi: Initialize iscsi_conn->dd_data only if memory is allocated\n\nIn case of an ib_fast_reg_mr allocation failure during iSER setup, the\nmachine hits a panic because iscsi_conn->dd_data is initialized\nunconditionally, even when no memory is allocated (dd_size == 0).  This\nleads invalid pointer dereference during connection teardown.\n\nFix by setting iscsi_conn->dd_data only if memory is actually allocated.\n\nPanic trace:\n------------\n iser: iser_create_fastreg_desc: Failed to allocate ib_fast_reg_mr err=-12\n iser: iser_alloc_rx_descriptors: failed allocating rx descriptors / data buffers\n BUG: unable to handle page fault for address: fffffffffffffff8\n RIP: 0010:swake_up_locked.part.5+0xa/0x40\n Call Trace:\n  complete+0x31/0x40\n  iscsi_iser_conn_stop+0x88/0xb0 [ib_iser]\n  iscsi_stop_conn+0x66/0xc0 [scsi_transport_iscsi]\n  iscsi_if_stop_conn+0x14a/0x150 [scsi_transport_iscsi]\n  iscsi_if_rx+0x1135/0x1834 [scsi_transport_iscsi]\n  ? netlink_lookup+0x12f/0x1b0\n  ? netlink_deliver_tap+0x2c/0x200\n  netlink_unicast+0x1ab/0x280\n  netlink_sendmsg+0x257/0x4f0\n  ? _copy_from_user+0x29/0x60\n  sock_sendmsg+0x5f/0x70","Type":"Description","Title":"scsi: libiscsi: Initialize iscsi_conn->dd_data only if memory is"}]}}}