{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31425", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.088Z", "datePublished": "2026-04-13T13:40:28.911Z", "dateUpdated": "2026-04-13T13:40:28.911Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-13T13:40:28.911Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrds: ib: reject FRMR registration before IB connection is established\n\nrds_ib_get_mr() extracts the rds_ib_connection from conn->c_transport_data\nand passes it to rds_ib_reg_frmr() for FRWR memory registration. On a\nfresh outgoing connection, ic is allocated in rds_ib_conn_alloc() with\ni_cm_id = NULL because the connection worker has not yet called\nrds_ib_conn_path_connect() to create the rdma_cm_id. When sendmsg() with\nRDS_CMSG_RDMA_MAP is called on such a connection, the sendmsg path parses\nthe control message before any connection establishment, allowing\nrds_ib_post_reg_frmr() to dereference ic->i_cm_id->qp and crash the\nkernel.\n\nThe existing guard in rds_ib_reg_frmr() only checks for !ic (added in\ncommit 9e630bcb7701), which does not catch this case since ic is allocated\nearly and is always non-NULL once the connection object exists.\n\n KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n RIP: 0010:rds_ib_post_reg_frmr+0x50e/0x920\n Call Trace:\n rds_ib_post_reg_frmr (net/rds/ib_frmr.c:167)\n rds_ib_map_frmr (net/rds/ib_frmr.c:252)\n rds_ib_reg_frmr (net/rds/ib_frmr.c:430)\n rds_ib_get_mr (net/rds/ib_rdma.c:615)\n __rds_rdma_map (net/rds/rdma.c:295)\n rds_cmsg_rdma_map (net/rds/rdma.c:860)\n rds_sendmsg (net/rds/send.c:1363)\n ____sys_sendmsg\n do_syscall_64\n\nAdd a check in rds_ib_get_mr() that verifies ic, i_cm_id, and qp are all\nnon-NULL before proceeding with FRMR registration, mirroring the guard\nalready present in rds_ib_post_inv(). Return -ENODEV when the connection\nis not ready, which the existing error handling in rds_cmsg_send() converts\nto -EAGAIN for userspace retry and triggers rds_conn_connect_if_down() to\nstart the connection worker."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/rds/ib_rdma.c"], "versions": [{"version": "1659185fb4d0025835eb2058a141f0746c5cab00", "lessThan": "450ec93c0f172374acbf236f1f5f02d53650aa2d", "status": "affected", "versionType": "git"}, {"version": "1659185fb4d0025835eb2058a141f0746c5cab00", "lessThan": "6b0a8de67ac0c74e1a7df92b73c862cb36780dfc", "status": "affected", "versionType": "git"}, {"version": "1659185fb4d0025835eb2058a141f0746c5cab00", "lessThan": "a5bfd14c9a299e6db4add4440430ee5e010b03ad", "status": "affected", "versionType": "git"}, {"version": "1659185fb4d0025835eb2058a141f0746c5cab00", "lessThan": "23e07c340c445f0ebff7757ba15434cb447eb662", "status": "affected", "versionType": "git"}, {"version": "1659185fb4d0025835eb2058a141f0746c5cab00", "lessThan": "47de5b73db3b88f45c107393f26aeba26e9e8fae", "status": "affected", "versionType": "git"}, {"version": "1659185fb4d0025835eb2058a141f0746c5cab00", "lessThan": "a54ecccfae62c5c85259ae5ea5d9c20009519049", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/rds/ib_rdma.c"], "versions": [{"version": "4.6", "status": "affected"}, {"version": "0", "lessThan": "4.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.12", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "4.6", "versionEndExcluding": "6.1.168"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.6.134"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.12.81"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.18.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.19.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/450ec93c0f172374acbf236f1f5f02d53650aa2d"}, {"url": "https://git.kernel.org/stable/c/6b0a8de67ac0c74e1a7df92b73c862cb36780dfc"}, {"url": "https://git.kernel.org/stable/c/a5bfd14c9a299e6db4add4440430ee5e010b03ad"}, {"url": "https://git.kernel.org/stable/c/23e07c340c445f0ebff7757ba15434cb447eb662"}, {"url": "https://git.kernel.org/stable/c/47de5b73db3b88f45c107393f26aeba26e9e8fae"}, {"url": "https://git.kernel.org/stable/c/a54ecccfae62c5c85259ae5ea5d9c20009519049"}], "title": "rds: ib: reject FRMR registration before IB connection is established", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrds: ib: reject FRMR registration before IB connection is established\n\nrds_ib_get_mr() extracts the rds_ib_connection from conn->c_transport_data\nand passes it to rds_ib_reg_frmr() for FRWR memory registration. On a\nfresh outgoing connection, ic is allocated in rds_ib_conn_alloc() with\ni_cm_id = NULL because the connection worker has not yet called\nrds_ib_conn_path_connect() to create the rdma_cm_id. When sendmsg() with\nRDS_CMSG_RDMA_MAP is called on such a connection, the sendmsg path parses\nthe control message before any connection establishment, allowing\nrds_ib_post_reg_frmr() to dereference ic->i_cm_id->qp and crash the\nkernel.\n\nThe existing guard in rds_ib_reg_frmr() only checks for !ic (added in\ncommit 9e630bcb7701), which does not catch this case since ic is allocated\nearly and is always non-NULL once the connection object exists.\n\n KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n RIP: 0010:rds_ib_post_reg_frmr+0x50e/0x920\n Call Trace:\n rds_ib_post_reg_frmr (net/rds/ib_frmr.c:167)\n rds_ib_map_frmr (net/rds/ib_frmr.c:252)\n rds_ib_reg_frmr (net/rds/ib_frmr.c:430)\n rds_ib_get_mr (net/rds/ib_rdma.c:615)\n __rds_rdma_map (net/rds/rdma.c:295)\n rds_cmsg_rdma_map (net/rds/rdma.c:860)\n rds_sendmsg (net/rds/send.c:1363)\n ____sys_sendmsg\n do_syscall_64\n\nAdd a check in rds_ib_get_mr() that verifies ic, i_cm_id, and qp are all\nnon-NULL before proceeding with FRMR registration, mirroring the guard\nalready present in rds_ib_post_inv(). Return -ENODEV when the connection\nis not ready, which the existing error handling in rds_cmsg_send() converts\nto -EAGAIN for userspace retry and triggers rds_conn_connect_if_down() to\nstart the connection worker."}], "id": "CVE-2026-31425", "lastModified": "2026-04-13T14:16:12.420", "metrics": {}, "published": "2026-04-13T14:16:12.420", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/23e07c340c445f0ebff7757ba15434cb447eb662"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/450ec93c0f172374acbf236f1f5f02d53650aa2d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/47de5b73db3b88f45c107393f26aeba26e9e8fae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6b0a8de67ac0c74e1a7df92b73c862cb36780dfc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a54ecccfae62c5c85259ae5ea5d9c20009519049"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a5bfd14c9a299e6db4add4440430ee5e010b03ad"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}