{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-89784", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.766Z", "datePublished": "2026-09-16T08:48:22.404Z", "dateUpdated": "2026-10-19T08:52:36.983Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:52:36.983Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: check rpc_sockaddr2uaddr() return value in rpcb_register_inet4/6\n\nrpcb_register_inet4() and rpcb_register_inet6() store the result of\nrpc_sockaddr2uaddr() into map->r_addr without checking it for NULL.\nrpc_sockaddr2uaddr() returns NULL when its final kstrdup() fails, and\nthe unchecked NULL is then carried into the synchronous RPCBPROC_SET\nencode path: rpcb_register_call() -> rpc_call_sync() ->\nrpcb_enc_getaddr() -> encode_rpcb_string(), whose first statement is\nstrlen(string), dereferencing NULL and oopsing the kernel.\n\nThe crash reproduces under failslab on v6.12; with KASAN the NULL\ndereference surfaces as a fault on the shadow of address zero:\n\n Oops: general protection fault, probably for non-canonical address\n 0xdffffc0000000000 [#1] PREEMPT SMP KASAN\n RIP: 0010:strlen (lib/string.c:409)\n Call Trace:\n encode_rpcb_string (net/sunrpc/rpcb_clnt.c:890)\n rpcb_enc_getaddr (net/sunrpc/rpcb_clnt.c:910)\n rpcauth_wrap_req_encode (net/sunrpc/auth.c:745)\n call_encode (net/sunrpc/clnt.c:1966)\n __rpc_execute (net/sunrpc/sched.c:952)\n rpc_run_task (net/sunrpc/clnt.c:1243)\n rpc_call_sync (net/sunrpc/clnt.c:1272)\n rpcb_v4_register (net/sunrpc/rpcb_clnt.c:500)\n svc_generic_rpcbind_set\n nfsd_rpcbind_set\n svc_register\n svc_setup_socket\n svc_addsock\n write_ports\n nfsctl_transaction_write\n vfs_write\n\nThe crash is reachable when an in-kernel RPC service (nfsd, lockd,\nnfs-callback) registers with the local rpcbind under enough memory\npressure for the small GFP_KERNEL kstrdup() in rpc_sockaddr2uaddr() to\nfail. The asynchronous getport path already handles this exact failure\nmode by returning -ENOMEM; only the two register helpers omit the check.\n\nMirror that handling: bail out with -ENOMEM when rpc_sockaddr2uaddr()\nreturns NULL, before the address is fed into the encoder." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/sunrpc/rpcb_clnt.c" ], "versions": [ { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "lessThan": "04441b792ec40eb66349b5fab34b6a2090b5b2dd", "status": "affected", "versionType": "git" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "lessThan": "5a51c49ddb37b883566874aecc66bc5a2e617a96", "status": "affected", "versionType": "git" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "lessThan": "4a6095de8cb1858e05bdf70b3e7d6d7645c25041", "status": "affected", "versionType": "git" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "lessThan": "12bf3e0182ccdaf3b412756a756d3944a7dacaa9", "status": "affected", "versionType": "git" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "lessThan": "4e01022974355732e748ec8ebc97c558cb624ffe", "status": "affected", "versionType": "git" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "lessThan": "cda4aacfb0bbf5c0f90fd0b42c72c749635d1368", "status": "affected", "versionType": "git" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "lessThan": "eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6", "status": "affected", "versionType": "git" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "lessThan": "fd22370226a0d8109045d0831fd5aaadee921693", "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/sunrpc/rpcb_clnt.c" ], "versions": [ { "version": "3.2", "status": "affected" }, { "version": "0", "lessThan": "3.2", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "3.2", "versionEndExcluding": "5.10.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "5.15.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.12.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.18.52" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "7.2.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/04441b792ec40eb66349b5fab34b6a2090b5b2dd" }, { "url": "https://git.kernel.org/stable/c/5a51c49ddb37b883566874aecc66bc5a2e617a96" }, { "url": "https://git.kernel.org/stable/c/4a6095de8cb1858e05bdf70b3e7d6d7645c25041" }, { "url": "https://git.kernel.org/stable/c/12bf3e0182ccdaf3b412756a756d3944a7dacaa9" }, { "url": "https://git.kernel.org/stable/c/4e01022974355732e748ec8ebc97c558cb624ffe" }, { "url": "https://git.kernel.org/stable/c/cda4aacfb0bbf5c0f90fd0b42c72c749635d1368" }, { "url": "https://git.kernel.org/stable/c/eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6" }, { "url": "https://git.kernel.org/stable/c/fd22370226a0d8109045d0831fd5aaadee921693" } ], "title": "SUNRPC: check rpc_sockaddr2uaddr() return value in rpcb_register_inet4/6", "x_generator": { "engine": "bippy-1.2.0" } } } }