CVE-2022-50350

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at this point, if the initiator drops the connection, the\niscsit_conn structure will be freed, login_work will dereference a released\nsocket structure and the kernel crashes.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000230\nPF: supervisor write access in kernel mode\nPF: error_code(0x0002) - not-present page\nWorkqueue: events iscsi_target_do_login_rx [iscsi_target_mod]\nRIP: 0010:_raw_read_lock_bh+0x15/0x30\nCall trace:\n iscsi_target_do_login_rx+0x75/0x3f0 [iscsi_target_mod]\n process_one_work+0x1e8/0x3c0\n\nFix this bug by forcing login_work to stop after the login has been\ncompleted and the socket callbacks have been restored.\n\nAdd a comment to clearify the return values of iscsi_target_do_login()"}], "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 - The bug is in the in-kernel iSCSI target (LIO) login path on a TCP network portal (typically port 3260); a remote initiator triggers it by sending login traffic and extra socket data over the network.\nAC:L - The attacker controls both sides of the race by completing login while injecting extra data to schedule login_work, then dropping the connection; no uninfluenceable victim state or lucky timing beyond attacker-driven traffic is required.\nPR:N - Discovery sessions disable authentication by default (AuthMethod allows None), so an unauthenticated remote initiator can complete login and hit the vulnerable success path without credentials.\nUI:N - Exploitation requires only attacker-initiated iSCSI TCP connections and crafted login/extra data; no victim user action is needed.\nS:U - Impact remains within the target kernel's authority (UAF/crash of the host kernel); this is not a VM escape, IOMMU bypass, or other cross-boundary scope change.\nC:H - The bug is a use-after-free of iscsit_conn (and associated socket state) while login_work still runs on the freed object, which can be reclaimed/sprayed to obtain arbitrary read primitives.\nI:H - The same workqueue UAF on a freed iscsit_conn enables heap reuse and control of subsequent sock/login pointer use, providing a path to arbitrary write and control-flow hijacking.\nA:H - The demonstrated result is a kernel NULL pointer dereference/oops in iscsi_target_do_login_rx, and UAFs reliably cause kernel crashes even when not fully exploited."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/target/iscsi/iscsi_target_nego.c"], "versions": [{"version": "d381a8010a052813a88e20e089be4a58aad8b40a", "lessThan": "1533b8b3058db618409f41554ebe768c2e3acfae", "status": "affected", "versionType": "git"}, {"version": "d381a8010a052813a88e20e089be4a58aad8b40a", "lessThan": "3ecdca49ca49d4770639d81503c873b6d25887c4", "status": "affected", "versionType": "git"}, {"version": "d381a8010a052813a88e20e089be4a58aad8b40a", "lessThan": "fec1b2fa62c162d03f5dcd7b03e3c89d3116d49f", "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/target/iscsi/iscsi_target_nego.c"], "versions": [{"version": "3.12", "status": "affected"}, {"version": "0", "lessThan": "3.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.16", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.2", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2", "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": "3.12", "versionEndExcluding": "6.0.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.1.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1533b8b3058db618409f41554ebe768c2e3acfae"}, {"url": "https://git.kernel.org/stable/c/3ecdca49ca49d4770639d81503c873b6d25887c4"}, {"url": "https://git.kernel.org/stable/c/fec1b2fa62c162d03f5dcd7b03e3c89d3116d49f"}], "title": "scsi: target: iscsi: Fix a race condition between login_work and the login thread", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-50350", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-14T18:21:59.970337Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:22:58.881Z"}}]}}

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the iscsi_target_sk_data_ready() callback will schedule the\nlogin_work and, at the same time, the negotiation may end without clearing\nthe LOGIN_FLAGS_INITIAL_PDU flag (because no additional PDU exchanges are\nrequired to complete the login).\n\nThe login has been completed but the login_work function will find the\nLOGIN_FLAGS_INITIAL_PDU flag set and will never stop from rescheduling\nitself; at this point, if the initiator drops the connection, the\niscsit_conn structure will be freed, login_work will dereference a released\nsocket structure and the kernel crashes.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000230\nPF: supervisor write access in kernel mode\nPF: error_code(0x0002) - not-present page\nWorkqueue: events iscsi_target_do_login_rx [iscsi_target_mod]\nRIP: 0010:_raw_read_lock_bh+0x15/0x30\nCall trace:\n iscsi_target_do_login_rx+0x75/0x3f0 [iscsi_target_mod]\n process_one_work+0x1e8/0x3c0\n\nFix this bug by forcing login_work to stop after the login has been\ncompleted and the socket callbacks have been restored.\n\nAdd a comment to clearify the return values of iscsi_target_do_login()"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0.16", "versionStartIncluding": "3.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.2", "versionStartIncluding": "3.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.2", "versionStartIncluding": "3.12"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:58:19.647Z"}}}, "cveMetadata": {"cveId": "CVE-2022-50350", "state": "PUBLISHED", "dateUpdated": "2026-08-05T08:58:19.647Z", "dateReserved": "2025-09-16T16:03:27.882Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-09-16T16:11:42.029Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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the iscsi_target_sk_data_ready() callback will schedule the\nlogin_work and, at the same time, the negotiation may end without clearing\nthe LOGIN_FLAGS_INITIAL_PDU flag (because no additional PDU exchanges are\nrequired to complete the login).\n\nThe login has been completed but the login_work function will find the\nLOGIN_FLAGS_INITIAL_PDU flag set and will never stop from rescheduling\nitself; at this point, if the initiator drops the connection, the\niscsit_conn structure will be freed, login_work will dereference a released\nsocket structure and the kernel crashes.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000230\nPF: supervisor write access in kernel mode\nPF: error_code(0x0002) - not-present page\nWorkqueue: events iscsi_target_do_login_rx [iscsi_target_mod]\nRIP: 0010:_raw_read_lock_bh+0x15/0x30\nCall trace:\n iscsi_target_do_login_rx+0x75/0x3f0 [iscsi_target_mod]\n process_one_work+0x1e8/0x3c0\n\nFix this bug by forcing login_work to stop after the login has been\ncompleted and the socket callbacks have been restored.\n\nAdd a comment to clearify the return values of iscsi_target_do_login()"}], "id": "CVE-2022-50350", "lastModified": "2026-08-04T10:18:12.157", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-50350", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-14T18:21:59.970337Z", "version": "2.0.3"}}]}, "published": "2025-09-16T17:15:34.833", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1533b8b3058db618409f41554ebe768c2e3acfae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3ecdca49ca49d4770639d81503c873b6d25887c4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fec1b2fa62c162d03f5dcd7b03e3c89d3116d49f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: scsi: target: iscsi: Fix a race condition between login_work and the login thread", "id": "2395874", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395874"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2022-50350", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50350\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50350\nhttps://lore.kernel.org/linux-cve-announce/2025091640-CVE-2022-50350-31bb@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-17T10:04:20.631577+00:00", "updated": "2025-09-17T10:04:20.631610+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}