Vulnerability-Lookup

CVE-2026-89784 (GCVE-0-2026-89784)

Vulnerability from cvelistv5 – Published: 2026-09-16 08:48 – Updated: 2026-09-16 08:48

Title

SUNRPC: check rpc_sockaddr2uaddr() return value in rpcb_register_inet4/6

Summary

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: check rpc_sockaddr2uaddr() return value in rpcb_register_inet4/6 rpcb_register_inet4() and rpcb_register_inet6() store the result of rpc_sockaddr2uaddr() into map->r_addr without checking it for NULL. rpc_sockaddr2uaddr() returns NULL when its final kstrdup() fails, and the unchecked NULL is then carried into the synchronous RPCBPROC_SET encode path: rpcb_register_call() -> rpc_call_sync() -> rpcb_enc_getaddr() -> encode_rpcb_string(), whose first statement is strlen(string), dereferencing NULL and oopsing the kernel. The crash reproduces under failslab on v6.12; with KASAN the NULL dereference surfaces as a fault on the shadow of address zero: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000 [#1] PREEMPT SMP KASAN RIP: 0010:strlen (lib/string.c:409) Call Trace: encode_rpcb_string (net/sunrpc/rpcb_clnt.c:890) rpcb_enc_getaddr (net/sunrpc/rpcb_clnt.c:910) rpcauth_wrap_req_encode (net/sunrpc/auth.c:745) call_encode (net/sunrpc/clnt.c:1966) __rpc_execute (net/sunrpc/sched.c:952) rpc_run_task (net/sunrpc/clnt.c:1243) rpc_call_sync (net/sunrpc/clnt.c:1272) rpcb_v4_register (net/sunrpc/rpcb_clnt.c:500) svc_generic_rpcbind_set nfsd_rpcbind_set svc_register svc_setup_socket svc_addsock write_ports nfsctl_transaction_write vfs_write The crash is reachable when an in-kernel RPC service (nfsd, lockd, nfs-callback) registers with the local rpcbind under enough memory pressure for the small GFP_KERNEL kstrdup() in rpc_sockaddr2uaddr() to fail. The asynchronous getport path already handles this exact failure mode by returning -ENOMEM; only the two register helpers omit the check. Mirror that handling: bail out with -ENOMEM when rpc_sockaddr2uaddr() returns NULL, before the address is fed into the encoder.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/04441b792ec40eb66…
https://git.kernel.org/stable/c/5a51c49ddb37b8835…
https://git.kernel.org/stable/c/4a6095de8cb1858e0…
https://git.kernel.org/stable/c/12bf3e0182ccdaf3b…
https://git.kernel.org/stable/c/4e01022974355732e…
https://git.kernel.org/stable/c/cda4aacfb0bbf5c0f…
https://git.kernel.org/stable/c/eb476289c12cc22c8…
https://git.kernel.org/stable/c/fd22370226a0d8109…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: d77385f23830ee6c400569bac8b37e6eb3b7d360 , < 04441b792ec40eb66349b5fab34b6a2090b5b2dd (git) Affected: d77385f23830ee6c400569bac8b37e6eb3b7d360 , < 5a51c49ddb37b883566874aecc66bc5a2e617a96 (git) Affected: d77385f23830ee6c400569bac8b37e6eb3b7d360 , < 4a6095de8cb1858e05bdf70b3e7d6d7645c25041 (git) Affected: d77385f23830ee6c400569bac8b37e6eb3b7d360 , < 12bf3e0182ccdaf3b412756a756d3944a7dacaa9 (git) Affected: d77385f23830ee6c400569bac8b37e6eb3b7d360 , < 4e01022974355732e748ec8ebc97c558cb624ffe (git) Affected: d77385f23830ee6c400569bac8b37e6eb3b7d360 , < cda4aacfb0bbf5c0f90fd0b42c72c749635d1368 (git) Affected: d77385f23830ee6c400569bac8b37e6eb3b7d360 , < eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6 (git) Affected: d77385f23830ee6c400569bac8b37e6eb3b7d360 , < fd22370226a0d8109045d0831fd5aaadee921693 (git)	guessed
Linux	Linux	Affected: 3.2 Unaffected: 0 , < 3.2 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)	guessed

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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/rpcb_clnt.c"
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          "vendor": "Linux",
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
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              "versionType": "git"
            },
            {
              "lessThan": "4e01022974355732e748ec8ebc97c558cb624ffe",
              "status": "affected",
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          "vendor": "Linux",
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              "version": "3.2"
            },
            {
              "lessThan": "3.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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                  "versionEndExcluding": "5.10.270",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
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                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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-\u003er_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() -\u003e rpc_call_sync() -\u003e\nrpcb_enc_getaddr() -\u003e 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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T08:48:22.404Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89784",
    "datePublished": "2026-09-16T08:48:22.404Z",
    "dateReserved": "2026-09-11T19:38:34.766Z",
    "dateUpdated": "2026-09-16T08:48:22.404Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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    "epss": {
      "cve": "CVE-2026-89784",
      "date": "2026-09-16",
      "epss": "0.0021",
      "percentile": "0.11443"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-89784\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-16T09:17:09.060\",\"lastModified\":\"2026-09-16T09:17:09.060\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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-\u003er_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() -\u003e rpc_call_sync() -\u003e\\nrpcb_enc_getaddr() -\u003e 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\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/sunrpc/rpcb_clnt.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d77385f23830ee6c400569bac8b37e6eb3b7d360\",\"lessThan\":\"04441b792ec40eb66349b5fab34b6a2090b5b2dd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d77385f23830ee6c400569bac8b37e6eb3b7d360\",\"lessThan\":\"5a51c49ddb37b883566874aecc66bc5a2e617a96\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d77385f23830ee6c400569bac8b37e6eb3b7d360\",\"lessThan\":\"4a6095de8cb1858e05bdf70b3e7d6d7645c25041\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d77385f23830ee6c400569bac8b37e6eb3b7d360\",\"lessThan\":\"12bf3e0182ccdaf3b412756a756d3944a7dacaa9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d77385f23830ee6c400569bac8b37e6eb3b7d360\",\"lessThan\":\"4e01022974355732e748ec8ebc97c558cb624ffe\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d77385f23830ee6c400569bac8b37e6eb3b7d360\",\"lessThan\":\"cda4aacfb0bbf5c0f90fd0b42c72c749635d1368\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d77385f23830ee6c400569bac8b37e6eb3b7d360\",\"lessThan\":\"eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d77385f23830ee6c400569bac8b37e6eb3b7d360\",\"lessThan\":\"fd22370226a0d8109045d0831fd5aaadee921693\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/sunrpc/rpcb_clnt.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.270\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.110\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.52\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.6\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/04441b792ec40eb66349b5fab34b6a2090b5b2dd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/12bf3e0182ccdaf3b412756a756d3944a7dacaa9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4a6095de8cb1858e05bdf70b3e7d6d7645c25041\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4e01022974355732e748ec8ebc97c558cb624ffe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5a51c49ddb37b883566874aecc66bc5a2e617a96\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cda4aacfb0bbf5c0f90fd0b42c72c749635d1368\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fd22370226a0d8109045d0831fd5aaadee921693\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-89784

Vulnerability from fkie_nvd - Published: 2026-09-16 09:17 - Updated: 2026-09-16 09:17

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/04441b792ec40eb66349b5fab34b6a2090b5b2dd
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/12bf3e0182ccdaf3b412756a756d3944a7dacaa9
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4a6095de8cb1858e05bdf70b3e7d6d7645c25041
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4e01022974355732e748ec8ebc97c558cb624ffe
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5a51c49ddb37b883566874aecc66bc5a2e617a96
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cda4aacfb0bbf5c0f90fd0b42c72c749635d1368
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fd22370226a0d8109045d0831fd5aaadee921693

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/rpcb_clnt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "04441b792ec40eb66349b5fab34b6a2090b5b2dd",
              "status": "affected",
              "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360",
              "versionType": "git"
            },
            {
              "lessThan": "5a51c49ddb37b883566874aecc66bc5a2e617a96",
              "status": "affected",
              "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360",
              "versionType": "git"
            },
            {
              "lessThan": "4a6095de8cb1858e05bdf70b3e7d6d7645c25041",
              "status": "affected",
              "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360",
              "versionType": "git"
            },
            {
              "lessThan": "12bf3e0182ccdaf3b412756a756d3944a7dacaa9",
              "status": "affected",
              "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360",
              "versionType": "git"
            },
            {
              "lessThan": "4e01022974355732e748ec8ebc97c558cb624ffe",
              "status": "affected",
              "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360",
              "versionType": "git"
            },
            {
              "lessThan": "cda4aacfb0bbf5c0f90fd0b42c72c749635d1368",
              "status": "affected",
              "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360",
              "versionType": "git"
            },
            {
              "lessThan": "eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6",
              "status": "affected",
              "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360",
              "versionType": "git"
            },
            {
              "lessThan": "fd22370226a0d8109045d0831fd5aaadee921693",
              "status": "affected",
              "version": "d77385f23830ee6c400569bac8b37e6eb3b7d360",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/rpcb_clnt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.2"
            },
            {
              "lessThan": "3.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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-\u003er_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() -\u003e rpc_call_sync() -\u003e\nrpcb_enc_getaddr() -\u003e 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."
    }
  ],
  "id": "CVE-2026-89784",
  "lastModified": "2026-09-16T09:17:09.060",
  "metrics": {},
  "published": "2026-09-16T09:17:09.060",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/04441b792ec40eb66349b5fab34b6a2090b5b2dd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/12bf3e0182ccdaf3b412756a756d3944a7dacaa9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4a6095de8cb1858e05bdf70b3e7d6d7645c25041"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4e01022974355732e748ec8ebc97c558cb624ffe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5a51c49ddb37b883566874aecc66bc5a2e617a96"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cda4aacfb0bbf5c0f90fd0b42c72c749635d1368"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fd22370226a0d8109045d0831fd5aaadee921693"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-8JPC-3W39-9JVG

Vulnerability from github – Published: 2026-09-16 09:30 – Updated: 2026-09-16 09:30

Details

In the Linux kernel, the following vulnerability has been resolved:

SUNRPC: check rpc_sockaddr2uaddr() return value in rpcb_register_inet4/6

rpcb_register_inet4() and rpcb_register_inet6() store the result of rpc_sockaddr2uaddr() into map->r_addr without checking it for NULL. rpc_sockaddr2uaddr() returns NULL when its final kstrdup() fails, and the unchecked NULL is then carried into the synchronous RPCBPROC_SET encode path: rpcb_register_call() -> rpc_call_sync() -> rpcb_enc_getaddr() -> encode_rpcb_string(), whose first statement is strlen(string), dereferencing NULL and oopsing the kernel.

The crash reproduces under failslab on v6.12; with KASAN the NULL dereference surfaces as a fault on the shadow of address zero:

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000 [#1] PREEMPT SMP KASAN RIP: 0010:strlen (lib/string.c:409) Call Trace: encode_rpcb_string (net/sunrpc/rpcb_clnt.c:890) rpcb_enc_getaddr (net/sunrpc/rpcb_clnt.c:910) rpcauth_wrap_req_encode (net/sunrpc/auth.c:745) call_encode (net/sunrpc/clnt.c:1966) __rpc_execute (net/sunrpc/sched.c:952) rpc_run_task (net/sunrpc/clnt.c:1243) rpc_call_sync (net/sunrpc/clnt.c:1272) rpcb_v4_register (net/sunrpc/rpcb_clnt.c:500) svc_generic_rpcbind_set nfsd_rpcbind_set svc_register svc_setup_socket svc_addsock write_ports nfsctl_transaction_write vfs_write

The crash is reachable when an in-kernel RPC service (nfsd, lockd, nfs-callback) registers with the local rpcbind under enough memory pressure for the small GFP_KERNEL kstrdup() in rpc_sockaddr2uaddr() to fail. The asynchronous getport path already handles this exact failure mode by returning -ENOMEM; only the two register helpers omit the check.

Mirror that handling: bail out with -ENOMEM when rpc_sockaddr2uaddr() returns NULL, before the address is fed into the encoder.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-89784"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T09:17:09Z",
    "severity": null
  },
  "details": "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-\u003er_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() -\u003e rpc_call_sync() -\u003e\nrpcb_enc_getaddr() -\u003e 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.",
  "id": "GHSA-8jpc-3w39-9jvg",
  "modified": "2026-09-16T09:30:30Z",
  "published": "2026-09-16T09:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89784"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/04441b792ec40eb66349b5fab34b6a2090b5b2dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/12bf3e0182ccdaf3b412756a756d3944a7dacaa9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4a6095de8cb1858e05bdf70b3e7d6d7645c25041"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4e01022974355732e748ec8ebc97c558cb624ffe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a51c49ddb37b883566874aecc66bc5a2e617a96"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cda4aacfb0bbf5c0f90fd0b42c72c749635d1368"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd22370226a0d8109045d0831fd5aaadee921693"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-89784 (GCVE-0-2026-89784)

FKIE_CVE-2026-89784

GHSA-8JPC-3W39-9JVG

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