{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49321", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:08:31.537Z", "datePublished": "2025-02-26T02:10:46.186Z", "dateUpdated": "2026-08-05T08:54:42.523Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:54:42.523Z" }, "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": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "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 → rpcrdma_reply_handler → 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->bc_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->sv_cb_lock), which is a high availability impact and can be repeated by the remote peer." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/sunrpc/xprtrdma/rpc_rdma.c" ], "versions": [ { "version": "63cae47005af51c937f4cdcc4835f29075add2ba", "lessThan": "8e3943c50764dc7c5f25911970c3ff062ec1f18c", "status": "affected", "versionType": "git" }, { "version": "63cae47005af51c937f4cdcc4835f29075add2ba", "lessThan": "998d35a2aff4b81a1c784f3aa45cd3afff6814c1", "status": "affected", "versionType": "git" }, { "version": "63cae47005af51c937f4cdcc4835f29075add2ba", "lessThan": "da99331fa62131a38a0947a8204c5208de7b0454", "status": "affected", "versionType": "git" }, { "version": "63cae47005af51c937f4cdcc4835f29075add2ba", "lessThan": "8dbae5affbdbf524b48000f9d357925bb001e5f4", "status": "affected", "versionType": "git" }, { "version": "63cae47005af51c937f4cdcc4835f29075add2ba", "lessThan": "a3fc8051ee061e31db13e2fe011e8e0b71a7f815", "status": "affected", "versionType": "git" }, { "version": "63cae47005af51c937f4cdcc4835f29075add2ba", "lessThan": "90c4f73104016748533a5707ecd15930fbeff402", "status": "affected", "versionType": "git" }, { "version": "63cae47005af51c937f4cdcc4835f29075add2ba", "lessThan": "91784f3d77b73885e1b2e6b59d3cbf0de0a1126a", "status": "affected", "versionType": "git" }, { "version": "63cae47005af51c937f4cdcc4835f29075add2ba", "lessThan": "11270e7ca268e8d61b5d9e5c3a54bd1550642c9c", "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/xprtrdma/rpc_rdma.c" ], "versions": [ { "version": "4.4", "status": "affected" }, { "version": "0", "lessThan": "4.4", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.283", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.247", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.198", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.122", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.47", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.15", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.4", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19", "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": "4.4", "versionEndExcluding": "4.14.283" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "4.19.247" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "5.4.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "5.10.122" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "5.15.47" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "5.17.15" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "5.18.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "5.19" } ] } ] } ], "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" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49321", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T19:43:44.893562Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T19:46:56.703Z" } } ] } }