CVE-2022-49321 (GCVE-0-2022-49321)
Vulnerability from cvelistv5
Published
2025-02-26 02:10
Modified
2026-08-05 08:54
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 ...
References
Impacted products
Vendor Product Version
Linux Linux Version: 63cae47005af51c937f4cdcc4835f29075add2ba
Version: 63cae47005af51c937f4cdcc4835f29075add2ba
Version: 63cae47005af51c937f4cdcc4835f29075add2ba
Version: 63cae47005af51c937f4cdcc4835f29075add2ba
Version: 63cae47005af51c937f4cdcc4835f29075add2ba
Version: 63cae47005af51c937f4cdcc4835f29075add2ba
Version: 63cae47005af51c937f4cdcc4835f29075add2ba
Version: 63cae47005af51c937f4cdcc4835f29075add2ba
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{
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              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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      "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..."
        }
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            "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"
          },
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              "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."
            }
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:54:42.523Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/8e3943c50764dc7c5f25911970c3ff062ec1f18c"
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          "url": "https://git.kernel.org/stable/c/a3fc8051ee061e31db13e2fe011e8e0b71a7f815"
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        {
          "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"
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  },
  "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",
  "vulnerability-lookup:meta": {
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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.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"63cae47005af51c937f4cdcc4835f29075add2ba\", \"lessThan\": \"8e3943c50764dc7c5f25911970c3ff062ec1f18c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63cae47005af51c937f4cdcc4835f29075add2ba\", \"lessThan\": \"998d35a2aff4b81a1c784f3aa45cd3afff6814c1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63cae47005af51c937f4cdcc4835f29075add2ba\", \"lessThan\": \"da99331fa62131a38a0947a8204c5208de7b0454\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63cae47005af51c937f4cdcc4835f29075add2ba\", \"lessThan\": \"8dbae5affbdbf524b48000f9d357925bb001e5f4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63cae47005af51c937f4cdcc4835f29075add2ba\", \"lessThan\": \"a3fc8051ee061e31db13e2fe011e8e0b71a7f815\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63cae47005af51c937f4cdcc4835f29075add2ba\", \"lessThan\": \"90c4f73104016748533a5707ecd15930fbeff402\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63cae47005af51c937f4cdcc4835f29075add2ba\", \"lessThan\": \"91784f3d77b73885e1b2e6b59d3cbf0de0a1126a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63cae47005af51c937f4cdcc4835f29075add2ba\", \"lessThan\": \"11270e7ca268e8d61b5d9e5c3a54bd1550642c9c\", \"versionType\": \"git\"}], \"programFiles\": [\"net/sunrpc/xprtrdma/rpc_rdma.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.4\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.4\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.14.283\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.247\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.198\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.122\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.47\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.17.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.17.*\"}, {\"status\": \"unaffected\", \"version\": \"5.18.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.18.*\"}, {\"status\": \"unaffected\", \"version\": \"5.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sunrpc/xprtrdma/rpc_rdma.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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...\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.283\", \"versionStartIncluding\": \"4.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.247\", \"versionStartIncluding\": \"4.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.198\", \"versionStartIncluding\": \"4.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.122\", \"versionStartIncluding\": \"4.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.47\", \"versionStartIncluding\": \"4.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17.15\", \"versionStartIncluding\": \"4.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.18.4\", \"versionStartIncluding\": \"4.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.19\", \"versionStartIncluding\": \"4.4\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:54:42.523Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49321\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:54:42.523Z\", \"dateReserved\": \"2025-02-26T02:08:31.537Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-26T02:10:46.186Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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