{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53431", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:54:09.745Z", "datePublished": "2025-09-18T16:04:11.748Z", "dateUpdated": "2026-08-05T09:14:06.042Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:14:06.042Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ses: Handle enclosure with just a primary component gracefully\n\nThis reverts commit 3fe97ff3d949 (\"scsi: ses: Don't attach if enclosure\nhas no components\") and introduces proper handling of case where there are\nno detected secondary components, but primary component (enumerated in\nnum_enclosures) does exist. That fix was originally proposed by Ding Hui\n.\n\nCompletely ignoring devices that have one primary enclosure and no\nsecondary one results in ses_intf_add() bailing completely\n\n\tscsi 2:0:0:254: enclosure has no enumerated components\n scsi 2:0:0:254: Failed to bind enclosure -12ven in valid configurations such\n\neven on valid configurations with 1 primary and 0 secondary enclosures as\nbelow:\n\n\t# sg_ses /dev/sg0\n\t 3PARdata SES 3321\n\tSupported diagnostic pages:\n\t Supported Diagnostic Pages [sdp] [0x0]\n\t Configuration (SES) [cf] [0x1]\n\t Short Enclosure Status (SES) [ses] [0x8]\n\t# sg_ses -p cf /dev/sg0\n\t 3PARdata SES 3321\n\tConfiguration diagnostic page:\n\t number of secondary subenclosures: 0\n\t generation code: 0x0\n\t enclosure descriptor list\n\t Subenclosure identifier: 0 [primary]\n\t relative ES process id: 0, number of ES processes: 1\n\t number of type descriptor headers: 1\n\t enclosure logical identifier (hex): 20000002ac02068d\n\t enclosure vendor: 3PARdata product: VV rev: 3321\n\t type descriptor header and text list\n\t Element type: Unspecified, subenclosure id: 0\n\t number of possible elements: 1\n\nThe changelog for the original fix follows\n\n=====\nWe can get a crash when disconnecting the iSCSI session,\nthe call trace like this:\n\n [ffff00002a00fb70] kfree at ffff00000830e224\n [ffff00002a00fba0] ses_intf_remove at ffff000001f200e4\n [ffff00002a00fbd0] device_del at ffff0000086b6a98\n [ffff00002a00fc50] device_unregister at ffff0000086b6d58\n [ffff00002a00fc70] __scsi_remove_device at ffff00000870608c\n [ffff00002a00fca0] scsi_remove_device at ffff000008706134\n [ffff00002a00fcc0] __scsi_remove_target at ffff0000087062e4\n [ffff00002a00fd10] scsi_remove_target at ffff0000087064c0\n [ffff00002a00fd70] __iscsi_unbind_session at ffff000001c872c4\n [ffff00002a00fdb0] process_one_work at ffff00000810f35c\n [ffff00002a00fe00] worker_thread at ffff00000810f648\n [ffff00002a00fe70] kthread at ffff000008116e98\n\nIn ses_intf_add, components count could be 0, and kcalloc 0 size scomp,\nbut not saved in edev->component[i].scratch\n\nIn this situation, edev->component[0].scratch is an invalid pointer,\nwhen kfree it in ses_intf_remove_enclosure, a crash like above would happen\nThe call trace also could be other random cases when kfree cannot catch\nthe invalid pointer\n\nWe should not use edev->component[] array when the components count is 0\nWe also need check index when use edev->component[] array in\nses_enclosure_data_process\n=====" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - A malicious SES target on the storage fabric (SAS expander/enclosure, FC, or iSCSI/SRP) supplies a configuration page with zero DEVICE/ARRAY_DEVICE elements; the commit’s own crash path is iSCSI session teardown into ses_intf_remove_enclosure(), matching sibling SES fabric scores (CVE-2023-53675/53803/7324).\nAC:L - The attacker fully controls the SES page-1 type list and can deterministically report no DEVICE/ARRAY_DEVICE components, then drop the session to hit the unguarded edev->component[0] access; no race or uncontrolled timing is required.\nPR:N - ses_intf_add() runs automatically from the SCSI class_interface during LUN discovery for any target that sets the EncServ INQUIRY bit or is TYPE_ENCLOSURE, with no host credentials or capabilities required.\nUI:N - Enclosure bind/unbind is driven by kernel hotplug and session teardown (e.g. __iscsi_unbind_session); the attacker’s fabric device presents and disconnects without any victim mount, open, or configuration step.\nS:U - The slab OOB read and resulting kfree operate on ordinary host-kernel heap within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Reading past the zero-length component[] flex array yields an 8-byte neighbour pointer that is passed to kfree(), freeing a live adjacent object and enabling a groomable use-after-free kernel-memory read primitive.\nI:H - kfree() of the OOB-derived pointer is an invalid/duplicate-free primitive: reclaiming the still-referenced slab object allows overwrite of kernel data and control-flow hijack, consistent with the same remove-path bug in CVE-2023-53521.\nA:H - The bogus free corrupts the allocator and oopses/panics (as in the documented iSCSI disconnect trace), and the attacker can re-trigger by re-presenting and dropping the malicious enclosure at will." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/ses.c" ], "versions": [ { "version": "9927c68864e9c39cc317b4f559309ba29e642168", "lessThan": "4e7c498c3713b09bef20c76c7319555637e8bbd5", "status": "affected", "versionType": "git" }, { "version": "9927c68864e9c39cc317b4f559309ba29e642168", "lessThan": "110d425cdfb15006f3c4fde5264e786a247b6b36", "status": "affected", "versionType": "git" }, { "version": "9927c68864e9c39cc317b4f559309ba29e642168", "lessThan": "176d7345b89ced72020a313bfa4e7f345d1c3aed", "status": "affected", "versionType": "git" }, { "version": "9927c68864e9c39cc317b4f559309ba29e642168", "lessThan": "05143d90ac90b7abc6692285895a1ef460e008ee", "status": "affected", "versionType": "git" }, { "version": "9927c68864e9c39cc317b4f559309ba29e642168", "lessThan": "f8e702c54413eee2d8f94f61d18adadac7c87e87", "status": "affected", "versionType": "git" }, { "version": "9927c68864e9c39cc317b4f559309ba29e642168", "lessThan": "eabc4872f172ecb8dd8536bc366a51868154a450", "status": "affected", "versionType": "git" }, { "version": "9927c68864e9c39cc317b4f559309ba29e642168", "lessThan": "c8e22b7a1694bb8d025ea636816472739d859145", "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/scsi/ses.c" ], "versions": [ { "version": "2.6.25", "status": "affected" }, { "version": "0", "lessThan": "2.6.25", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.281", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.241", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.178", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.108", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.25", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2.12", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.3", "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": "2.6.25", "versionEndExcluding": "4.19.281" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "5.4.241" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "5.10.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "5.15.108" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "6.1.25" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "6.2.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "6.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/4e7c498c3713b09bef20c76c7319555637e8bbd5" }, { "url": "https://git.kernel.org/stable/c/110d425cdfb15006f3c4fde5264e786a247b6b36" }, { "url": "https://git.kernel.org/stable/c/176d7345b89ced72020a313bfa4e7f345d1c3aed" }, { "url": "https://git.kernel.org/stable/c/05143d90ac90b7abc6692285895a1ef460e008ee" }, { "url": "https://git.kernel.org/stable/c/f8e702c54413eee2d8f94f61d18adadac7c87e87" }, { "url": "https://git.kernel.org/stable/c/eabc4872f172ecb8dd8536bc366a51868154a450" }, { "url": "https://git.kernel.org/stable/c/c8e22b7a1694bb8d025ea636816472739d859145" } ], "title": "scsi: ses: Handle enclosure with just a primary component gracefully", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2023-53431", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-01-14T19:15:06.852762Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T19:23:09.474Z" } } ] } }