CVE-2021-46963

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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 \u2192 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": 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"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": 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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": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "64a8c5018a4b21b04a756a56c495ef47c14e92d9", "lessThan": "c5ab9b67d8b061de74e2ca51bf787ee599bd7f89", "versionType": "git"}, {"status": "affected", "version": "dea6ee7173039d489977c9ed92e3749154615db4", "lessThan": "77509a238547863040a42d57c72403f7d4c89a8f", "versionType": "git"}, {"status": "affected", "version": "af2a0c51b1205327f55a7e82e530403ae1d42cbb", "lessThan": "702cdaa2c6283c135ef16d52e0e4e3c1005aa538", "versionType": "git"}, {"status": "affected", "version": "af2a0c51b1205327f55a7e82e530403ae1d42cbb", "lessThan": "80ef24175df2cba3860d0369d1c662b49ee2de56", "versionType": "git"}, {"status": "affected", "version": "af2a0c51b1205327f55a7e82e530403ae1d42cbb", "lessThan": "a73208e3244127ef9f2cdf24e4adb947aaa32053", "versionType": "git"}, {"status": "affected", "version": "af2a0c51b1205327f55a7e82e530403ae1d42cbb", "lessThan": "6641df81ab799f28a5d564f860233dd26cca0d93", "versionType": "git"}, {"status": "affected", "version": "4a1cc2f71bc57cf8dee6f58e7d2355a43aabb312", "versionType": "git"}, {"status": "affected", "version": "4.19.90", "lessThan": "4.19.191", "versionType": "semver"}, {"status": "affected", "version": "5.4.4", "lessThan": "5.4.118", "versionType": "semver"}, {"status": "affected", "version": "5.3.17", "lessThan": "5.4", "versionType": "semver"}], "programFiles": ["drivers/scsi/qla2xxx/qla_os.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.5"}, {"status": "unaffected", "version": "0", "lessThan": "5.5", "versionType": "semver"}, {"status": "unaffected", "version": "4.19.191", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.118", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.36", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.11.20", "versionType": "semver", "lessThanOrEqual": "5.11.*"}, {"status": "unaffected", "version": "5.12.3", "versionType": "semver", "lessThanOrEqual": "5.12.*"}, {"status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/scsi/qla2xxx/qla_os.c"], "defaultStatus": "affected"}], "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"}], "x_generator": {"engine": "bippy-1.2.0"}, "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. 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This fixes smatch warning of srb unintended\nfree."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: qla2xxx: Soluciona falla en qla2xxx_mqueuecommand() RIP: 0010:kmem_cache_free+0xfa/0x1b0 Rastreo de llamadas: qla2xxx_mqueuecommand+0x2b5/0x2c0 [qla2xxx] scsi_queue_rq+0x5e2/0xa40 __blk_mq_try_issue_ directamente+0x128 /0x1d0 blk_mq_request_issue_directly+0x4e/0xb0 Se corrigi\u00f3 la llamada incorrecta para liberar srb en qla2xxx_mqueuecommand(), ya que srb ahora est\u00e1 asignado por capas superiores. Esto corrige la advertencia de srb gratuito no deseado."}], "id": "CVE-2021-46963", "lastModified": "2026-08-04T10:16:38.593", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-46963", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-02-27T20:13:28.391773Z", "version": "2.0.3"}}]}, "published": "2024-02-27T19:04:07.000", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6641df81ab799f28a5d564f860233dd26cca0d93"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/702cdaa2c6283c135ef16d52e0e4e3c1005aa538"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/77509a238547863040a42d57c72403f7d4c89a8f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/80ef24175df2cba3860d0369d1c662b49ee2de56"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a73208e3244127ef9f2cdf24e4adb947aaa32053"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c5ab9b67d8b061de74e2ca51bf787ee599bd7f89"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6641df81ab799f28a5d564f860233dd26cca0d93"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/702cdaa2c6283c135ef16d52e0e4e3c1005aa538"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/77509a238547863040a42d57c72403f7d4c89a8f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/80ef24175df2cba3860d0369d1c662b49ee2de56"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a73208e3244127ef9f2cdf24e4adb947aaa32053"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c5ab9b67d8b061de74e2ca51bf787ee599bd7f89"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: scsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()", "id": "2266816", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2266816"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nscsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()\nRIP: 0010:kmem_cache_free+0xfa/0x1b0\nCall Trace:\nqla2xxx_mqueuecommand+0x2b5/0x2c0 [qla2xxx]\nscsi_queue_rq+0x5e2/0xa40\n__blk_mq_try_issue_directly+0x128/0x1d0\nblk_mq_request_issue_directly+0x4e/0xb0\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."], "name": "CVE-2021-46963", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-02-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-46963\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-46963\nhttps://lore.kernel.org/linux-cve-announce/2024022719-CVE-2021-46963-32a8@gregkh/T/#u"], "threat_severity": "Low"}

{}