CVE-2023-53431 (GCVE-0-2023-53431)

Vulnerability from cvelistv5 – Published: 2025-09-18 16:04 – Updated: 2026-08-05 09:14
VLAI
Title
scsi: ses: Handle enclosure with just a primary component gracefully
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: ses: Handle enclosure with just a primary component gracefully This reverts commit 3fe97ff3d949 ("scsi: ses: Don't attach if enclosure has no components") and introduces proper handling of case where there are no detected secondary components, but primary component (enumerated in num_enclosures) does exist. That fix was originally proposed by Ding Hui <dinghui@sangfor.com.cn>. Completely ignoring devices that have one primary enclosure and no secondary one results in ses_intf_add() bailing completely scsi 2:0:0:254: enclosure has no enumerated components scsi 2:0:0:254: Failed to bind enclosure -12ven in valid configurations such even on valid configurations with 1 primary and 0 secondary enclosures as below: # sg_ses /dev/sg0 3PARdata SES 3321 Supported diagnostic pages: Supported Diagnostic Pages [sdp] [0x0] Configuration (SES) [cf] [0x1] Short Enclosure Status (SES) [ses] [0x8] # sg_ses -p cf /dev/sg0 3PARdata SES 3321 Configuration diagnostic page: number of secondary subenclosures: 0 generation code: 0x0 enclosure descriptor list Subenclosure identifier: 0 [primary] relative ES process id: 0, number of ES processes: 1 number of type descriptor headers: 1 enclosure logical identifier (hex): 20000002ac02068d enclosure vendor: 3PARdata product: VV rev: 3321 type descriptor header and text list Element type: Unspecified, subenclosure id: 0 number of possible elements: 1 The changelog for the original fix follows ===== We can get a crash when disconnecting the iSCSI session, the call trace like this: [ffff00002a00fb70] kfree at ffff00000830e224 [ffff00002a00fba0] ses_intf_remove at ffff000001f200e4 [ffff00002a00fbd0] device_del at ffff0000086b6a98 [ffff00002a00fc50] device_unregister at ffff0000086b6d58 [ffff00002a00fc70] __scsi_remove_device at ffff00000870608c [ffff00002a00fca0] scsi_remove_device at ffff000008706134 [ffff00002a00fcc0] __scsi_remove_target at ffff0000087062e4 [ffff00002a00fd10] scsi_remove_target at ffff0000087064c0 [ffff00002a00fd70] __iscsi_unbind_session at ffff000001c872c4 [ffff00002a00fdb0] process_one_work at ffff00000810f35c [ffff00002a00fe00] worker_thread at ffff00000810f648 [ffff00002a00fe70] kthread at ffff000008116e98 In ses_intf_add, components count could be 0, and kcalloc 0 size scomp, but not saved in edev->component[i].scratch In this situation, edev->component[0].scratch is an invalid pointer, when kfree it in ses_intf_remove_enclosure, a crash like above would happen The call trace also could be other random cases when kfree cannot catch the invalid pointer We should not use edev->component[] array when the components count is 0 We also need check index when use edev->component[] array in ses_enclosure_data_process =====
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 19:15 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9927c68864e9c39cc317b4f559309ba29e642168 , < 4e7c498c3713b09bef20c76c7319555637e8bbd5 (git)
Affected: 9927c68864e9c39cc317b4f559309ba29e642168 , < 110d425cdfb15006f3c4fde5264e786a247b6b36 (git)
Affected: 9927c68864e9c39cc317b4f559309ba29e642168 , < 176d7345b89ced72020a313bfa4e7f345d1c3aed (git)
Affected: 9927c68864e9c39cc317b4f559309ba29e642168 , < 05143d90ac90b7abc6692285895a1ef460e008ee (git)
Affected: 9927c68864e9c39cc317b4f559309ba29e642168 , < f8e702c54413eee2d8f94f61d18adadac7c87e87 (git)
Affected: 9927c68864e9c39cc317b4f559309ba29e642168 , < eabc4872f172ecb8dd8536bc366a51868154a450 (git)
Affected: 9927c68864e9c39cc317b4f559309ba29e642168 , < c8e22b7a1694bb8d025ea636816472739d859145 (git)
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Linux Linux Affected: 2.6.25
Unaffected: 0 , < 2.6.25 (semver)
Unaffected: 4.19.281 , ≤ 4.19.* (semver)
Unaffected: 5.4.241 , ≤ 5.4.* (semver)
Unaffected: 5.10.178 , ≤ 5.10.* (semver)
Unaffected: 5.15.108 , ≤ 5.15.* (semver)
Unaffected: 6.1.25 , ≤ 6.1.* (semver)
Unaffected: 6.2.12 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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          "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\u0027t 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\u003cdinghui@sangfor.com.cn\u003e.\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-\u003ecomponent[i].scratch\n\nIn this situation, edev-\u003ecomponent[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-\u003ecomponent[] array when the components count is 0\nWe also need check index when use edev-\u003ecomponent[] array in\nses_enclosure_data_process\n====="
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              "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\u2019s 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-\u003ecomponent[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\u2019s 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."
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            "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\u0027t 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\u003cdinghui@sangfor.com.cn\u003e.\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-\u003ecomponent[i].scratch\n\nIn this situation, edev-\u003ecomponent[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-\u003ecomponent[] array when the components count is 0\nWe also need check index when use edev-\u003ecomponent[] array in\nses_enclosure_data_process\n====="
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            {
              "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\u0027t 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\u003cdinghui@sangfor.com.cn\u003e.\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-\u003ecomponent[i].scratch\n\nIn this situation, edev-\u003ecomponent[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-\u003ecomponent[] array when the components count is 0\nWe also need check index when use edev-\u003ecomponent[] array in\nses_enclosure_data_process\n====="
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T19:44:50.979Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "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"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-53431",
        "datePublished": "2025-09-18T16:04:11.748Z",
        "dateReserved": "2025-09-17T14:54:09.745Z",
        "dateUpdated": "2026-05-11T19:44:50.979Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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