{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2022-21546", "assignerOrgId": "43595867-4340-4103-b7a2-9a5208d29a85", "state": "PUBLISHED", "assignerShortName": "oracle", "dateReserved": "2021-11-15T19:29:08.898Z", "datePublished": "2025-05-02T21:52:09.864Z", "dateUpdated": "2026-08-05T08:51:31.985Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:51:31.985Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: Fix WRITE_SAME No Data Buffer crash\n\nIn newer version of the SBC specs, we have a NDOB bit that indicates there\nis no data buffer that gets written out. 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’s 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" }