{"id":"CVE-2025-38700","summary":"scsi: libiscsi: Initialize iscsi_conn-\u003edd_data only if memory is allocated","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi: Initialize iscsi_conn-\u003edd_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-\u003edd_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-\u003edd_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","aliases":["ECHO-d924-1003-5a29"],"modified":"2026-04-21T02:26:56.403800383Z","published":"2025-09-04T15:32:52.241Z","related":["SUSE-SU-2025:21040-1","SUSE-SU-2025:21052-1","SUSE-SU-2025:21056-1","SUSE-SU-2025:21064-1","SUSE-SU-2025:21074-1","SUSE-SU-2025:21139-1","SUSE-SU-2025:21179-1","SUSE-SU-2025:4057-1","SUSE-SU-2025:4128-1","SUSE-SU-2025:4132-1","SUSE-SU-2025:4140-1","SUSE-SU-2025:4141-1","SUSE-SU-2025:4189-1","SUSE-SU-2025:4301-1","openSUSE-SU-2025:20081-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38700.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2b242ea14386a510010eabfbfc3ce81a101f3802"},{"type":"WEB","url":"https://git.kernel.org/stable/c/35782c32528d82aa21f84cb5ceb2abd3526a8159"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3ea3a256ed81f95ab0f3281a0e234b01a9cae605"},{"type":"WEB","url":"https://git.kernel.org/stable/c/66a373f50b4249d57f5a88c7be9676f9d5884865"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9ea6d961566c7d762ed0204b06db05756fdda3b6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a145c269dc5380c063a20a0db7e6df2995962e9d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a33d42b7fc24fe03f239fbb0880dd5b4b4b97c19"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f53af99f441ee79599d8df6113a7144d74cf9153"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fd5aad080edb501ab5c84b7623d612d0e3033403"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38700.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38700"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187"},{"fixed":"f53af99f441ee79599d8df6113a7144d74cf9153"},{"fixed":"9ea6d961566c7d762ed0204b06db05756fdda3b6"},{"fixed":"fd5aad080edb501ab5c84b7623d612d0e3033403"},{"fixed":"a145c269dc5380c063a20a0db7e6df2995962e9d"},{"fixed":"66a373f50b4249d57f5a88c7be9676f9d5884865"},{"fixed":"35782c32528d82aa21f84cb5ceb2abd3526a8159"},{"fixed":"a33d42b7fc24fe03f239fbb0880dd5b4b4b97c19"},{"fixed":"2b242ea14386a510010eabfbfc3ce81a101f3802"},{"fixed":"3ea3a256ed81f95ab0f3281a0e234b01a9cae605"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38700.json"}}],"schema_version":"1.7.5"}