{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47203", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-25T09:12:14.117Z", "datePublished": "2024-04-10T18:56:37.066Z", "dateUpdated": "2026-08-05T08:46:43.456Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:46:43.456Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()\n\nWhen parsing the txq list in lpfc_drain_txq(), the driver attempts to pass\nthe requests to the adapter. If such an attempt fails, a local \"fail_msg\"\nstring is set and a log message output. The job is then added to a\ncompletions list for cancellation.\n\nProcessing of any further jobs from the txq list continues, but since\n\"fail_msg\" remains set, jobs are added to the completions list regardless\nof whether a wqe was passed to the adapter. If successfully added to\ntxcmplq, jobs are added to both lists resulting in list corruption.\n\nFix by clearing the fail_msg string after adding a job to the completions\nlist. This stops the subsequent jobs from being added to the completions\nlist unless they had an appropriate failure." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - lpfc_drain_txq drains deferred ELS IOCBs on the Emulex FC HBA ELS ring; an adjacent FC/FCoE SAN fabric peer can induce discovery/ELS congestion that queues and drains those jobs, matching other lpfc adjacent-fabric scores.\nAC:L - A fabric attacker can flood ELS/discovery to exhaust SGLs (building a multi-job txq) and fill the WQ so one submit fails then later jobs succeed in the same drain; the sticky fail_msg bug then fires without relying on an uncontrollable memory layout.\nPR:N - The path runs in HBA/worker context on fabric-driven ELS traffic with no host authentication or capabilities required of the SAN peer.\nUI:N - ELS deferral and txq drain run automatically during fabric discovery and link events; no local user action is required.\nS:U - List corruption and resulting UAF stay inside the host kernel lpfc heap under the same OS authority; no VM escape or IOMMU/DMA boundary is crossed.\nC:H - Successfully submitted iocbqs are wrongly list_add'd onto completions while still on txcmplq, yielding list corruption and UAF of iocbq objects (including via iocbq_lookup on HW completion), enabling reclaim-assisted arbitrary read.\nI:H - Cancel invokes cmd_cmpl on the double-listed iocbq while HW completion still references it, producing a UAF with a callable function pointer suitable for heap grooming and control-flow hijack.\nA:H - Corrupted list walks and the subsequent UAF cause kernel oops/panic (or hangs under list corruption), fully denying host and FC storage-path availability." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/lpfc/lpfc_sli.c" ], "versions": [ { "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984", "lessThan": "ad4776b5eb2e58af1226847fcd3b4f6d051674dd", "status": "affected", "versionType": "git" }, { "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984", "lessThan": "ec70d80a8642900086447ba0cdc79e3f44d42e8f", "status": "affected", "versionType": "git" }, { "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984", "lessThan": "f05a0191b90156e539cccc189b9d87ca2a4d9305", "status": "affected", "versionType": "git" }, { "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984", "lessThan": "b291d147d0268e93ad866f8bc820ea14497abc9b", "status": "affected", "versionType": "git" }, { "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984", "lessThan": "16bcbfb56d759c25665f786e33ec633b9508a08f", "status": "affected", "versionType": "git" }, { "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984", "lessThan": "c097bd5a59162156d9c2077a2f58732ffbaa9fca", "status": "affected", "versionType": "git" }, { "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984", "lessThan": "814d3610c4ce86e8cf285b2cdac0057a42e82de5", "status": "affected", "versionType": "git" }, { "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984", "lessThan": "99154581b05c8fb22607afb7c3d66c1bace6aa5d", "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/scsi/lpfc/lpfc_sli.c" ], "versions": [ { "version": "2.6.36", "status": "affected" }, { "version": "0", "lessThan": "2.6.36", "status": "unaffected", "versionType": "semver" }, { "version": "4.4.293", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.291", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.256", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.218", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.162", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.82", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.5", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16", "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": "2.6.36", "versionEndExcluding": "4.4.293" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "4.9.291" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "4.14.256" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "4.19.218" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "5.4.162" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "5.10.82" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "5.15.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "5.16" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/ad4776b5eb2e58af1226847fcd3b4f6d051674dd" }, { "url": "https://git.kernel.org/stable/c/ec70d80a8642900086447ba0cdc79e3f44d42e8f" }, { "url": "https://git.kernel.org/stable/c/f05a0191b90156e539cccc189b9d87ca2a4d9305" }, { "url": "https://git.kernel.org/stable/c/b291d147d0268e93ad866f8bc820ea14497abc9b" }, { "url": "https://git.kernel.org/stable/c/16bcbfb56d759c25665f786e33ec633b9508a08f" }, { "url": "https://git.kernel.org/stable/c/c097bd5a59162156d9c2077a2f58732ffbaa9fca" }, { "url": "https://git.kernel.org/stable/c/814d3610c4ce86e8cf285b2cdac0057a42e82de5" }, { "url": "https://git.kernel.org/stable/c/99154581b05c8fb22607afb7c3d66c1bace6aa5d" } ], "title": "scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CISA ADP Vulnrichment", "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2021-47203", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { 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