{ "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": "2026-05-11T22:08:27.602Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:08:27.602Z" }, "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": "c506456ebf84c50ed9327473d4e9bd905def212b", "status": "affected", "versionType": "git" }, { "version": "1659185fb4d0025835eb2058a141f0746c5cab00", "lessThan": "82e4a3b56b23b844802056c9e75a39d24169b0a4", "status": "affected", "versionType": "git" }, { "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": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.203", "lessThanOrEqual": "5.15.*", "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": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "5.15.203" }, { "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/c506456ebf84c50ed9327473d4e9bd905def212b" }, { "url": "https://git.kernel.org/stable/c/82e4a3b56b23b844802056c9e75a39d24169b0a4" }, { "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" } } } }