{"id":"CVE-2025-38700","state":"PUBLISHED","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","publishedAt":"2025-09-04T15:32:52.241Z","updatedAt":"2026-05-12T12:05:37.822Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"f53af99f441ee79599d8df6113a7144d74cf9153","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"9ea6d961566c7d762ed0204b06db05756fdda3b6","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"fd5aad080edb501ab5c84b7623d612d0e3033403","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"a145c269dc5380c063a20a0db7e6df2995962e9d","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"66a373f50b4249d57f5a88c7be9676f9d5884865","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"35782c32528d82aa21f84cb5ceb2abd3526a8159","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"a33d42b7fc24fe03f239fbb0880dd5b4b4b97c19","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"2b242ea14386a510010eabfbfc3ce81a101f3802","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"3ea3a256ed81f95ab0f3281a0e234b01a9cae605","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/libiscsi.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.27","versionType":"semver"},{"version":"5.4.297","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.241","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.190","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.149","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.103","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.43","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.11","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16.2","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/libiscsi.c"]}],"references":["https://git.kernel.org/stable/c/f53af99f441ee79599d8df6113a7144d74cf9153","https://git.kernel.org/stable/c/9ea6d961566c7d762ed0204b06db05756fdda3b6","https://git.kernel.org/stable/c/fd5aad080edb501ab5c84b7623d612d0e3033403","https://git.kernel.org/stable/c/a145c269dc5380c063a20a0db7e6df2995962e9d","https://git.kernel.org/stable/c/66a373f50b4249d57f5a88c7be9676f9d5884865","https://git.kernel.org/stable/c/35782c32528d82aa21f84cb5ceb2abd3526a8159","https://git.kernel.org/stable/c/a33d42b7fc24fe03f239fbb0880dd5b4b4b97c19","https://git.kernel.org/stable/c/2b242ea14386a510010eabfbfc3ce81a101f3802","https://git.kernel.org/stable/c/3ea3a256ed81f95ab0f3281a0e234b01a9cae605","https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html","https://cert-portal.siemens.com/productcert/html/ssa-032379.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/38xxx/CVE-2025-38700.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38700","state":"PUBLISHED","datePublished":"2025-09-04T15:32:52.241Z","dateUpdated":"2026-05-12T12:05:37.822Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:24.032Z"},"containers":{"cna":{"title":"scsi: libiscsi: Initialize iscsi_conn->dd_data only if memory is allocated","descriptions":[{"lang":"en","value":"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"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"f53af99f441ee79599d8df6113a7144d74cf9153","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"9ea6d961566c7d762ed0204b06db05756fdda3b6","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"fd5aad080edb501ab5c84b7623d612d0e3033403","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"a145c269dc5380c063a20a0db7e6df2995962e9d","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"66a373f50b4249d57f5a88c7be9676f9d5884865","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"35782c32528d82aa21f84cb5ceb2abd3526a8159","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"a33d42b7fc24fe03f239fbb0880dd5b4b4b97c19","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"2b242ea14386a510010eabfbfc3ce81a101f3802","versionType":"git"},{"version":"5d91e209fb21fb9cc765729d4c6a85a9fb6c9187","status":"affected","lessThan":"3ea3a256ed81f95ab0f3281a0e234b01a9cae605","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/libiscsi.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.27","versionType":"semver"},{"version":"5.4.297","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.241","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.190","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.149","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.103","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.43","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.11","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16.2","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/libiscsi.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:33:17.792Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"5.4.297"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"5.10.241"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"5.15.190"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.1.149"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.6.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.12.43"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.15.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.16.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T17:41:31.738Z"}},{"affected":[{"vendor":"Siemens","product":"SIMATIC CN 4100","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"V5.0","versionType":"custom"}]}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-032379.html"}],"providerMetadata":{"shortName":"siemens-SADP","orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","dateUpdated":"2026-05-12T12:05:37.822Z"},"x_adpType":"supplier"}]}}}