{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-89784", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89784", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-09-16T08:48:22.404Z", "updatedAt": "2026-10-19T08:52:36.983Z", "importedAt": "2026-10-24T01:58:35.090Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "SUNRPC: check rpc_sockaddr2uaddr() return value in rpcb_register_inet4/6", "summary": "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": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "status": "affected", "versionType": "git", "lessThan": "04441b792ec40eb66349b5fab34b6a2090b5b2dd" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "status": "affected", "versionType": "git", "lessThan": "5a51c49ddb37b883566874aecc66bc5a2e617a96" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "status": "affected", "versionType": "git", "lessThan": "4a6095de8cb1858e05bdf70b3e7d6d7645c25041" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "status": "affected", "versionType": "git", "lessThan": "12bf3e0182ccdaf3b412756a756d3944a7dacaa9" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "status": "affected", "versionType": "git", "lessThan": "4e01022974355732e748ec8ebc97c558cb624ffe" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "status": "affected", "versionType": "git", "lessThan": "cda4aacfb0bbf5c0f90fd0b42c72c749635d1368" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "status": "affected", "versionType": "git", "lessThan": "eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6" }, { "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360", "status": "affected", "versionType": "git", "lessThan": "fd22370226a0d8109045d0831fd5aaadee921693" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.2", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.2" }, { "version": "5.10.270", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.221", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.188", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.157", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.110", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.52", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }