{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50717", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T12:20:40.329Z", "datePublished": "2025-12-24T12:22:41.269Z", "dateUpdated": "2026-08-05T08:59:27.894Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:59:27.894Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: add bounds check on Transfer Tag\n\nttag is used as an index to get cmd in nvmet_tcp_handle_h2c_data_pdu(),\nadd a bounds check to avoid out-of-bounds access." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - nvmet-tcp is an in-kernel NVMe-over-TCP target that listens on a TCP port and processes remote NVMe-TCP PDUs; a remote peer can send a crafted H2C Data PDU to reach nvmet_tcp_handle_h2c_data_pdu().\nAC:L - The attacker fully controls data->ttag in the H2C Data PDU and can reliably index past queue->cmds after Connect installs the command array; no race or conditions outside attacker control are required.\nPR:N - After ICReq, Connect to the discovery subsystem (always allows any hostnqn) or any allow_any_host target installs the queue and allocates cmds with no authentication; H2C Data handling then indexes by ttag without further auth checks.\nUI:N - Exploitation requires only sending network PDUs to the listening NVMe-TCP port; no victim user action is needed.\nS:U - Impact is confined to the kernel hosting the nvmet-tcp target; this is not a VM/IOMMU/sandbox boundary escape.\nC:H - Out-of-bounds access to struct nvmet_tcp_cmd reads adjacent slab memory (pointers, SGLs, offsets) and can be leveraged as an information-disclosure primitive, consistent with treating memory-corruption OOB as C:H.\nI:H - The OOB cmd is used to build a receive iovec (nvmet_tcp_build_pdu_iovec) and/or passed to nvmet_req_complete, enabling attacker-controlled writes into kernel memory determined by corrupted structure fields.\nA:H - Dereferencing or completing an out-of-bounds cmd structure reliably causes kernel oops/GPF/panic, so a remote attacker can crash the target." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/nvme/target/tcp.c" ], "versions": [ { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "0d150ccd55dbfad36f55855b40b381884c98456e", "status": "affected", "versionType": "git" }, { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "d5bb45f47b37d10f010355686b28c9ebacb361d4", "status": "affected", "versionType": "git" }, { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "ec8adf767e1cfa7031f853b8c71ba1963f07df15", "status": "affected", "versionType": "git" }, { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "fcf82e4553db911d10234ff2390cfd0e2aa854e4", "status": "affected", "versionType": "git" }, { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "752593d04637ebdc87fd29cba81897f21ae053f0", "status": "affected", "versionType": "git" }, { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "b6a545ffa2c192b1e6da4a7924edac5ba9f4ea2b", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/nvme/target/tcp.c" ], "versions": [ { "version": "5.0", "status": "affected" }, { "version": "0", "lessThan": "5.0", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.220", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.150", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.75", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.17", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.3", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1", "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": "5.0", "versionEndExcluding": "5.4.220" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.10.150" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.15.75" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.19.17" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.0.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0d150ccd55dbfad36f55855b40b381884c98456e" }, { "url": "https://git.kernel.org/stable/c/d5bb45f47b37d10f010355686b28c9ebacb361d4" }, { "url": "https://git.kernel.org/stable/c/ec8adf767e1cfa7031f853b8c71ba1963f07df15" }, { "url": "https://git.kernel.org/stable/c/fcf82e4553db911d10234ff2390cfd0e2aa854e4" }, { "url": "https://git.kernel.org/stable/c/752593d04637ebdc87fd29cba81897f21ae053f0" }, { "url": "https://git.kernel.org/stable/c/b6a545ffa2c192b1e6da4a7924edac5ba9f4ea2b" } ], "title": "nvmet-tcp: add bounds check on Transfer Tag", "x_generator": { "engine": "bippy-1.2.0" } } } }