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vuln-cve/data/2026/89xxx/CVE-2026-89784.json
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{
"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"
}
}
}
}
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