CVE-2022-21546

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If this bit is set using commands\nlike \"sg_write_same --ndob\" we will crash in target_core_iblock/file's\nexecute_write_same handlers when we go to access the se_cmd->t_data_sg\nbecause its NULL.\n\nThis patch adds a check for the NDOB bit in the common WRITE SAME code\nbecause we don't support it. And, it adds a check for zero SG elements in\neach handler in case the initiator tries to send a normal WRITE SAME with\nno data buffer."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable WRITE_SAME handlers live in fabric-independent LIO target core and are reached by SCSI CDBs delivered over network fabrics, principally iscsi_target on TCP/3260 (also isert/cxgbit), so a remote initiator can trigger the crash.\nAC:L - Sending a single WRITE_SAME(16/32) with the NDOB bit (or zero data-out length) deterministically leaves t_data_sg NULL and hits the NULL dereference; the attacker controls the CDB/flags and needs no race or special memory layout.\nPR:N - LIO iSCSI portals are routinely deployed with authentication=0 and generate_node_acls=1, and NDOB/zero-xfer yields DMA_NONE which bypasses lun_access_ro write-protect checks, so an unauthenticated network peer can obtain a nexus and issue the command.\nUI:N - Exploitation is solely attacker-driven iSCSI/SCSI traffic; no local user or administrator action is required once the target portal is listening.\nS:U - The NULL dereference oopses the same host kernel that implements the target; impact stays within that kernel\u2019s security authority with no VM/IOMMU/sandbox boundary crossed.\nC:N - This is a pure NULL pointer dereference of se_cmd->t_data_sg with no attacker-controlled offset, OOB read, or data returned to the initiator, so nothing is disclosed.\nI:N - No memory is written and no corrupted object is reused; the fault occurs on a read of sg->length / t_data_sg[0] before any store or control-flow hijack primitive exists.\nA:H - The NULL dereference produces a kernel oops/panic (especially with panic_on_oops) in the target command path and can be re-triggered at will by a remote initiator, taking down the storage host."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/target/target_core_file.c", "drivers/target/target_core_iblock.c", "drivers/target/target_core_sbc.c"], "versions": [{"version": "f6970ad31d42fceb38b5595cbad093a4d0bfcc43", "lessThan": "54e57be2573cf0b8bf650375fd8752987b6c3d3b", "status": "affected", "versionType": "git"}, {"version": "f6970ad31d42fceb38b5595cbad093a4d0bfcc43", "lessThan": "d8e6a27e9238dd294d6f2f401655f300dca20899", "status": "affected", "versionType": "git"}, {"version": "f6970ad31d42fceb38b5595cbad093a4d0bfcc43", "lessThan": "4226622647e3e5ac06d3ebc1605b917446157510", "status": "affected", "versionType": "git"}, {"version": "f6970ad31d42fceb38b5595cbad093a4d0bfcc43", "lessThan": "ccd3f449052449a917a3e577d8ba0368f43b8f29", "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/target_core_file.c", "drivers/target/target_core_iblock.c", "drivers/target/target_core_sbc.c"], "versions": [{"version": "3.8", "status": "affected"}, {"version": "0", "lessThan": "3.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.294", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.238", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.182", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19", "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": "3.8", "versionEndExcluding": "5.4.294"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.10.238"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.15.182"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/54e57be2573cf0b8bf650375fd8752987b6c3d3b"}, {"url": "https://git.kernel.org/stable/c/d8e6a27e9238dd294d6f2f401655f300dca20899"}, {"url": "https://git.kernel.org/stable/c/4226622647e3e5ac06d3ebc1605b917446157510"}, {"url": "https://git.kernel.org/stable/c/ccd3f449052449a917a3e577d8ba0368f43b8f29"}], "title": "scsi: target: Fix WRITE_SAME No Data Buffer crash", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-476", "lang": "en", "description": "CWE-476 NULL Pointer Dereference"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-05-06T15:06:53.886424Z", "id": "CVE-2022-21546", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-05-06T15:07:03.602Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:30:59.924Z"}}]}, "dataVersion": "5.2"}

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If this bit is set using commands\nlike \"sg_write_same --ndob\" we will crash in target_core_iblock/file's\nexecute_write_same handlers when we go to access the se_cmd->t_data_sg\nbecause its NULL.\n\nThis patch adds a check for the NDOB bit in the common WRITE SAME code\nbecause we don't support it. And, it adds a check for zero SG elements in\neach handler in case the initiator tries to send a normal WRITE SAME with\nno data buffer."}, {"lang": "es", "value": "En versiones m\u00e1s recientes de las especificaciones de SBC, tenemos un bit NDOB que indica que no hay b\u00fafer de datos que se escriba. Si este bit se activa mediante comandos como \"sg_write_same --ndob\", se producir\u00e1 un fallo en los controladores \"execute_write_same\" de target_core_iblock/file al acceder a se_cmd->t_data_sg, ya que es nulo. Puntuaci\u00f3n base de CVSS 3.1: 7.7 (Afecta a la disponibilidad). Vector CVSS: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H)."}], "id": "CVE-2022-21546", "lastModified": "2026-08-04T10:17:13.243", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-21546", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-05-06T15:06:53.886424Z", "version": "2.0.3"}}]}, "published": "2025-05-02T22:15:15.290", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4226622647e3e5ac06d3ebc1605b917446157510"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/54e57be2573cf0b8bf650375fd8752987b6c3d3b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ccd3f449052449a917a3e577d8ba0368f43b8f29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d8e6a27e9238dd294d6f2f401655f300dca20899"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"created": "2025-07-12T22:31:52.037208+00:00", "updated": "2025-07-12T22:31:52.037270+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}