{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-46963", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-27T18:42:55.942Z", "datePublished": "2024-02-27T18:47:01.783Z", "dateUpdated": "2026-08-05T08:45:15.980Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:45:15.980Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()\n\n RIP: 0010:kmem_cache_free+0xfa/0x1b0\n Call Trace:\n qla2xxx_mqueuecommand+0x2b5/0x2c0 [qla2xxx]\n scsi_queue_rq+0x5e2/0xa40\n __blk_mq_try_issue_directly+0x128/0x1d0\n blk_mq_request_issue_directly+0x4e/0xb0\n\nFix incorrect call to free srb in qla2xxx_mqueuecommand(), as srb is now\nallocated by upper layers. This fixes smatch warning of srb unintended\nfree." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable path is qla2xxx_queuecommand → qla2xxx_mqueuecommand on outbound initiator I/O through the SCSI/block stack, reachable by local reads/writes to qla2xxx-backed devices or filesystems, not by processing remote Fibre Channel or network packets.\nAC:L - Once a qpair is offline (PCI EEH/FLR/reset recovery, a normal operational state on QLogic FC HBAs) or DIF I/O hits an unsupported qpair, any subsequent SCSI command deterministically takes the QLA_INTERFACE_ERROR path and performs the incorrect free with no race or layout dependency.\nPR:L - Any unprivileged local user who can issue I/O to a mounted filesystem or block device backed by a qla2xxx HBA reaches queuecommand; no capabilities or init-namespace root are required.\nUI:N - The attacker triggers the bug by performing their own I/O against already-attached qla2xxx storage; no separate victim mount, open, or confirmation is required.\nS:U - Impact is confined to the host kernel privilege domain (crash or heap corruption via the SRB mempool); there is no VM escape, IOMMU bypass, or other cross-authority boundary crossing.\nC:H - When the SRB mempool is below min_nr (common with outstanding async fabric SRBs), mempool_free stores the embedded scsi_cmd_priv pointer; after scsi_done recycles the command this becomes a use-after-free that enables arbitrary kernel memory disclosure via heap reuse.\nI:H - The same mempool-poisoning UAF returns a dangling/aliased srb_t to later qla2xxx_get_qpair_sp callers for fabric/IOCB work, yielding heap corruption and control-flow hijack primitives suitable for privilege escalation.\nA:H - The reported failure is a kernel crash in kmem_cache_free from qla2xxx_mqueuecommand when the full mempool path frees the non-slab embedded SRB, which is full host availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/qla2xxx/qla_os.c" ], "versions": [ { "version": "64a8c5018a4b21b04a756a56c495ef47c14e92d9", "lessThan": "c5ab9b67d8b061de74e2ca51bf787ee599bd7f89", "status": "affected", "versionType": "git" }, { "version": "dea6ee7173039d489977c9ed92e3749154615db4", "lessThan": "77509a238547863040a42d57c72403f7d4c89a8f", "status": "affected", "versionType": "git" }, { "version": "af2a0c51b1205327f55a7e82e530403ae1d42cbb", "lessThan": "702cdaa2c6283c135ef16d52e0e4e3c1005aa538", "status": "affected", "versionType": "git" }, { "version": "af2a0c51b1205327f55a7e82e530403ae1d42cbb", "lessThan": "80ef24175df2cba3860d0369d1c662b49ee2de56", "status": "affected", "versionType": "git" }, { "version": "af2a0c51b1205327f55a7e82e530403ae1d42cbb", "lessThan": "a73208e3244127ef9f2cdf24e4adb947aaa32053", "status": "affected", "versionType": "git" }, { "version": "af2a0c51b1205327f55a7e82e530403ae1d42cbb", "lessThan": "6641df81ab799f28a5d564f860233dd26cca0d93", "status": "affected", "versionType": "git" }, { "version": "4a1cc2f71bc57cf8dee6f58e7d2355a43aabb312", "status": "affected", "versionType": "git" }, { "version": "4.19.90", "lessThan": "4.19.191", "status": "affected", "versionType": "semver" }, { "version": "5.4.4", "lessThan": "5.4.118", "status": "affected", "versionType": "semver" }, { "version": "5.3.17", "lessThan": "5.4", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/qla2xxx/qla_os.c" ], "versions": [ { "version": "5.5", "status": "affected" }, { "version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.191", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.118", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.36", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.11.20", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.12.3", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.13", "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": "4.19.90", "versionEndExcluding": "4.19.191" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.4", "versionEndExcluding": "5.4.118" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.10.36" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.11.20" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.12.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c5ab9b67d8b061de74e2ca51bf787ee599bd7f89" }, { "url": "https://git.kernel.org/stable/c/77509a238547863040a42d57c72403f7d4c89a8f" }, { "url": "https://git.kernel.org/stable/c/702cdaa2c6283c135ef16d52e0e4e3c1005aa538" }, { "url": "https://git.kernel.org/stable/c/80ef24175df2cba3860d0369d1c662b49ee2de56" }, { "url": "https://git.kernel.org/stable/c/a73208e3244127ef9f2cdf24e4adb947aaa32053" }, { "url": "https://git.kernel.org/stable/c/6641df81ab799f28a5d564f860233dd26cca0d93" } ], "title": "scsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2021-46963", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-02-27T20:13:28.391773Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-05T17:22:03.103Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:17:42.900Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/c5ab9b67d8b061de74e2ca51bf787ee599bd7f89", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/77509a238547863040a42d57c72403f7d4c89a8f", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/702cdaa2c6283c135ef16d52e0e4e3c1005aa538", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/80ef24175df2cba3860d0369d1c662b49ee2de56", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/a73208e3244127ef9f2cdf24e4adb947aaa32053", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/6641df81ab799f28a5d564f860233dd26cca0d93", "tags": [ "x_transferred" ] } ] } ] } }