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EUVD-2026-344710

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:57

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:57:40.682427+00:00",
  "id": "EUVD-2026-344710"
}

CVE-2022-49321 (GCVE-0-2022-49321)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:10 – Updated: 2026-08-05 08:54

Title

xprtrdma: treat all calls not a bcall when bc_serv is NULL

Summary

In the Linux kernel, the following vulnerability has been resolved: xprtrdma: treat all calls not a bcall when bc_serv is NULL When a rdma server returns a fault format reply, nfs v3 client may treats it as a bcall when bc service is not exist. The debug message at rpcrdma_bc_receive_call are, [56579.837169] RPC: rpcrdma_bc_receive_call: callback XID 00000001, length=20 [56579.837174] RPC: rpcrdma_bc_receive_call: 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 After that, rpcrdma_bc_receive_call will meets NULL pointer as, [ 226.057890] BUG: unable to handle kernel NULL pointer dereference at 00000000000000c8 ... [ 226.058704] RIP: 0010:_raw_spin_lock+0xc/0x20 ... [ 226.059732] Call Trace: [ 226.059878] rpcrdma_bc_receive_call+0x138/0x327 [rpcrdma] [ 226.060011] __ib_process_cq+0x89/0x170 [ib_core] [ 226.060092] ib_cq_poll_work+0x26/0x80 [ib_core] [ 226.060257] process_one_work+0x1a7/0x360 [ 226.060367] ? create_worker+0x1a0/0x1a0 [ 226.060440] worker_thread+0x30/0x390 [ 226.060500] ? create_worker+0x1a0/0x1a0 [ 226.060574] kthread+0x116/0x130 [ 226.060661] ? kthread_flush_work_fn+0x10/0x10 [ 226.060724] ret_from_fork+0x35/0x40 ...

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 19:43 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/8e3943c50764dc7c5…
https://git.kernel.org/stable/c/998d35a2aff4b81a1…
https://git.kernel.org/stable/c/da99331fa62131a38…
https://git.kernel.org/stable/c/8dbae5affbdbf524b…
https://git.kernel.org/stable/c/a3fc8051ee061e31d…
https://git.kernel.org/stable/c/90c4f731040167485…
https://git.kernel.org/stable/c/91784f3d77b73885e…
https://git.kernel.org/stable/c/11270e7ca268e8d61…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 63cae47005af51c937f4cdcc4835f29075add2ba , < 8e3943c50764dc7c5f25911970c3ff062ec1f18c (git) Affected: 63cae47005af51c937f4cdcc4835f29075add2ba , < 998d35a2aff4b81a1c784f3aa45cd3afff6814c1 (git) Affected: 63cae47005af51c937f4cdcc4835f29075add2ba , < da99331fa62131a38a0947a8204c5208de7b0454 (git) Affected: 63cae47005af51c937f4cdcc4835f29075add2ba , < 8dbae5affbdbf524b48000f9d357925bb001e5f4 (git) Affected: 63cae47005af51c937f4cdcc4835f29075add2ba , < a3fc8051ee061e31db13e2fe011e8e0b71a7f815 (git) Affected: 63cae47005af51c937f4cdcc4835f29075add2ba , < 90c4f73104016748533a5707ecd15930fbeff402 (git) Affected: 63cae47005af51c937f4cdcc4835f29075add2ba , < 91784f3d77b73885e1b2e6b59d3cbf0de0a1126a (git) Affected: 63cae47005af51c937f4cdcc4835f29075add2ba , < 11270e7ca268e8d61b5d9e5c3a54bd1550642c9c (git)
Linux	Linux	Affected: 4.4 Unaffected: 0 , < 4.4 (semver) Unaffected: 4.14.283 , ≤ 4.14.* (semver) Unaffected: 4.19.247 , ≤ 4.19.* (semver) Unaffected: 5.4.198 , ≤ 5.4.* (semver) Unaffected: 5.10.122 , ≤ 5.10.* (semver) Unaffected: 5.15.47 , ≤ 5.15.* (semver) Unaffected: 5.17.15 , ≤ 5.17.* (semver) Unaffected: 5.18.4 , ≤ 5.18.* (semver) Unaffected: 5.19 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-49321",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:43:44.893562Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T19:46:56.703Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/xprtrdma/rpc_rdma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8e3943c50764dc7c5f25911970c3ff062ec1f18c",
              "status": "affected",
              "version": "63cae47005af51c937f4cdcc4835f29075add2ba",
              "versionType": "git"
            },
            {
              "lessThan": "998d35a2aff4b81a1c784f3aa45cd3afff6814c1",
              "status": "affected",
              "version": "63cae47005af51c937f4cdcc4835f29075add2ba",
              "versionType": "git"
            },
            {
              "lessThan": "da99331fa62131a38a0947a8204c5208de7b0454",
              "status": "affected",
              "version": "63cae47005af51c937f4cdcc4835f29075add2ba",
              "versionType": "git"
            },
            {
              "lessThan": "8dbae5affbdbf524b48000f9d357925bb001e5f4",
              "status": "affected",
              "version": "63cae47005af51c937f4cdcc4835f29075add2ba",
              "versionType": "git"
            },
            {
              "lessThan": "a3fc8051ee061e31db13e2fe011e8e0b71a7f815",
              "status": "affected",
              "version": "63cae47005af51c937f4cdcc4835f29075add2ba",
              "versionType": "git"
            },
            {
              "lessThan": "90c4f73104016748533a5707ecd15930fbeff402",
              "status": "affected",
              "version": "63cae47005af51c937f4cdcc4835f29075add2ba",
              "versionType": "git"
            },
            {
              "lessThan": "91784f3d77b73885e1b2e6b59d3cbf0de0a1126a",
              "status": "affected",
              "version": "63cae47005af51c937f4cdcc4835f29075add2ba",
              "versionType": "git"
            },
            {
              "lessThan": "11270e7ca268e8d61b5d9e5c3a54bd1550642c9c",
              "status": "affected",
              "version": "63cae47005af51c937f4cdcc4835f29075add2ba",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/xprtrdma/rpc_rdma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.4"
            },
            {
              "lessThan": "4.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.283",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.247",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.122",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.15",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.283",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.247",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.198",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.122",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.47",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.15",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.4",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxprtrdma: treat all calls not a bcall when bc_serv is NULL\n\nWhen a rdma server returns a fault format reply, nfs v3 client may\ntreats it as a bcall when bc service is not exist.\n\nThe debug message at rpcrdma_bc_receive_call are,\n\n[56579.837169] RPC:       rpcrdma_bc_receive_call: callback XID\n00000001, length=20\n[56579.837174] RPC:       rpcrdma_bc_receive_call: 00 00 00 01 00 00 00\n00 00 00 00 00 00 00 00 00 00 00 00 04\n\nAfter that, rpcrdma_bc_receive_call will meets NULL pointer as,\n\n[  226.057890] BUG: unable to handle kernel NULL pointer dereference at\n00000000000000c8\n...\n[  226.058704] RIP: 0010:_raw_spin_lock+0xc/0x20\n...\n[  226.059732] Call Trace:\n[  226.059878]  rpcrdma_bc_receive_call+0x138/0x327 [rpcrdma]\n[  226.060011]  __ib_process_cq+0x89/0x170 [ib_core]\n[  226.060092]  ib_cq_poll_work+0x26/0x80 [ib_core]\n[  226.060257]  process_one_work+0x1a7/0x360\n[  226.060367]  ? create_worker+0x1a0/0x1a0\n[  226.060440]  worker_thread+0x30/0x390\n[  226.060500]  ? create_worker+0x1a0/0x1a0\n[  226.060574]  kthread+0x116/0x130\n[  226.060661]  ? kthread_flush_work_fn+0x10/0x10\n[  226.060724]  ret_from_fork+0x35/0x40\n..."
        }
      ],
      "metrics": [
        {
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            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerability is triggered by crafted RPC-over-RDMA messages delivered from a remote NFS/RDMA peer and handled on the client receive completion path (rpcrdma_wc_receive \u2192 rpcrdma_reply_handler \u2192 rpcrdma_is_bcall). Like other remote-peer protocol processing bugs, this is Network.\nAC:L - The remote peer fully controls the RDMA/RPC header fields used by the misclassification checks (rdma_msg, empty chunk lists, matching XIDs, RPC_CALL) and can reliably send such a message on an established connection; there is no race or other condition outside attacker control.\nPR:N - The attacker is the remote NFS/RDMA server peer and needs no privileges on the vulnerable client; once the client has an RDMA transport, the malicious reply path has no credential or capability gate.\nUI:N - In the highest-impact reasonable deployment (HPC/enterprise clients with existing NFS-over-RDMA mounts), a compromised or malicious server can send the crafted reply during normal operation without any further victim action.\nS:U - Impact is confined to the client host kernel/RPC transport authority and does not cross a VM, IOMMU, or other separate security boundary.\nC:N - The flaw is a pure NULL pointer dereference of xprt-\u003ebc_serv when taking sv_cb_lock; it does not read attacker-influenced memory or otherwise disclose kernel data.\nI:N - There is no memory corruption, write primitive, or control-flow hijack beyond the immediate NULL dereference crash.\nA:H - The NULL dereference causes a kernel oops/panic as shown in the fix commit crash trace (spin_lock on bc_serv-\u003esv_cb_lock), which is a high availability impact and can be repeated by the remote peer."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:54:42.523Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8e3943c50764dc7c5f25911970c3ff062ec1f18c"
        },
        {
          "url": "https://git.kernel.org/stable/c/998d35a2aff4b81a1c784f3aa45cd3afff6814c1"
        },
        {
          "url": "https://git.kernel.org/stable/c/da99331fa62131a38a0947a8204c5208de7b0454"
        },
        {
          "url": "https://git.kernel.org/stable/c/8dbae5affbdbf524b48000f9d357925bb001e5f4"
        },
        {
          "url": "https://git.kernel.org/stable/c/a3fc8051ee061e31db13e2fe011e8e0b71a7f815"
        },
        {
          "url": "https://git.kernel.org/stable/c/90c4f73104016748533a5707ecd15930fbeff402"
        },
        {
          "url": "https://git.kernel.org/stable/c/91784f3d77b73885e1b2e6b59d3cbf0de0a1126a"
        },
        {
          "url": "https://git.kernel.org/stable/c/11270e7ca268e8d61b5d9e5c3a54bd1550642c9c"
        }
      ],
      "title": "xprtrdma: treat all calls not a bcall when bc_serv is NULL",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49321",
    "datePublished": "2025-02-26T02:10:46.186Z",
    "dateReserved": "2025-02-26T02:08:31.537Z",
    "dateUpdated": "2026-08-05T08:54:42.523Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.
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EUVD-2026-344710

CVE-2022-49321 (GCVE-0-2022-49321)

Tags

Sightings

Nomenclature

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