{"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"}}]}}