Vulnerability-Lookup

FKIE_CVE-2026-90008

Vulnerability from fkie_nvd - Published: 2026-09-16 11:17 - Updated: 2026-09-16 15:18

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: scsi: megaraid_sas: Limit NVMe request size to the PRP chain frame megasas_make_prp_nvme() builds a command's PRP list in cmd->sg_frame, a DMA pool buffer of instance->max_chain_frame_sz bytes, spending one entry per NVMe page of the transfer plus one per page of the buffer for the chain pointer. The loop runs until the transfer is described and never checks the buffer bound. max_hw_sectors comes straight from the MDTS the firmware reports for the drive. On drives with a large MDTS the only thing keeping the list inside the buffer was the block layer default of 1280 KiB, which needs 320 entries, which fit into a 4 KiB frame as that holds 512. But since commit 9b8b84879d4a ("block: Increase BLK_DEF_MAX_SECTORS_CAP") that default is 4 MiB, and such a transfer needs 1025 entries, so the list runs a full page past the end of the frame: sd 1:0:1:0: [sdb] tag#630 page boundary ptr_sgl: 0x00000000ba62d13f BUG: unable to handle page fault for address: ff663bcb81e7c000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page RIP: 0010:megasas_build_and_issue_cmd_fusion+0xeaa/0x1870 [megaraid_sas] If the page after the frame happens to be mapped, the overrun does not fault but silently corrupts the neighbouring pool entry, which is another in-flight command's PRP list. Cap max_hw_sectors at what the chain frame can describe, less one page for transfers that do not start on a page boundary and so need one entry more. This is the megaraid_sas counterpart of commit 04631f55afc5 ("scsi: mpt3sas: Limit NVMe request size to 2 MiB"), but derives the limit from max_chain_frame_sz rather than hardcoding it.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4bb34769ef44ab3770b89e4055de6af4a458bec9
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4dd118d06dec9efe5065ac7897bdc18f404a3af4
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/af8c27375733fb6a6df9fa484cda77cc3dd0cb80

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/megaraid/megaraid_sas_base.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4bb34769ef44ab3770b89e4055de6af4a458bec9",
              "status": "affected",
              "version": "9b8b84879d4adc506b0d3944e20b28d9f3f6994b",
              "versionType": "git"
            },
            {
              "lessThan": "4dd118d06dec9efe5065ac7897bdc18f404a3af4",
              "status": "affected",
              "version": "9b8b84879d4adc506b0d3944e20b28d9f3f6994b",
              "versionType": "git"
            },
            {
              "lessThan": "af8c27375733fb6a6df9fa484cda77cc3dd0cb80",
              "status": "affected",
              "version": "9b8b84879d4adc506b0d3944e20b28d9f3f6994b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/megaraid/megaraid_sas_base.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: megaraid_sas: Limit NVMe request size to the PRP chain frame\n\nmegasas_make_prp_nvme() builds a command\u0027s PRP list in cmd-\u003esg_frame, a\nDMA pool buffer of instance-\u003emax_chain_frame_sz bytes, spending one\nentry per NVMe page of the transfer plus one per page of the buffer for\nthe chain pointer. The loop runs until the transfer is described and\nnever checks the buffer bound.\n\nmax_hw_sectors comes straight from the MDTS the firmware reports for the\ndrive. On drives with a large MDTS the only thing keeping the list\ninside the buffer was the block layer default of 1280 KiB, which needs\n320 entries, which fit into a 4 KiB frame as that holds 512. But since\ncommit 9b8b84879d4a (\"block: Increase BLK_DEF_MAX_SECTORS_CAP\") that\ndefault is 4 MiB, and such a transfer needs 1025 entries, so the list\nruns a full page past the end of the frame:\n\n  sd 1:0:1:0: [sdb] tag#630 page boundary ptr_sgl: 0x00000000ba62d13f\n  BUG: unable to handle page fault for address: ff663bcb81e7c000\n  #PF: supervisor write access in kernel mode\n  #PF: error_code(0x0002) - not-present page\n  RIP: 0010:megasas_build_and_issue_cmd_fusion+0xeaa/0x1870 [megaraid_sas]\n\nIf the page after the frame happens to be mapped, the overrun does not\nfault but silently corrupts the neighbouring pool entry, which is\nanother in-flight command\u0027s PRP list.\n\nCap max_hw_sectors at what the chain frame can describe, less one page\nfor transfers that do not start on a page boundary and so need one entry\nmore. This is the megaraid_sas counterpart of commit 04631f55afc5\n(\"scsi: mpt3sas: Limit NVMe request size to 2 MiB\"), but derives the\nlimit from max_chain_frame_sz rather than hardcoding it."
    }
  ],
  "id": "CVE-2026-90008",
  "lastModified": "2026-09-16T15:18:24.433",
  "metrics": {
    "cvssMetricV31": [
      {
        "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-16T11:17:13.443",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4bb34769ef44ab3770b89e4055de6af4a458bec9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4dd118d06dec9efe5065ac7897bdc18f404a3af4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/af8c27375733fb6a6df9fa484cda77cc3dd0cb80"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-90008 (GCVE-0-2026-90008)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:33 – Updated: 2026-09-16 14:41

Title

scsi: megaraid_sas: Limit NVMe request size to the PRP chain frame

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/4bb34769ef44ab377…
https://git.kernel.org/stable/c/4dd118d06dec9efe5…
https://git.kernel.org/stable/c/af8c27375733fb6a6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9b8b84879d4adc506b0d3944e20b28d9f3f6994b , < 4bb34769ef44ab3770b89e4055de6af4a458bec9 (git) Affected: 9b8b84879d4adc506b0d3944e20b28d9f3f6994b , < 4dd118d06dec9efe5065ac7897bdc18f404a3af4 (git) Affected: 9b8b84879d4adc506b0d3944e20b28d9f3f6994b , < af8c27375733fb6a6df9fa484cda77cc3dd0cb80 (git)
Linux	Linux	Affected: 6.17 Unaffected: 0 , < 6.17 (semver) Unaffected: 6.18.51 , ≤ 6.18.* (semver) Unaffected: 7.2.5 , ≤ 7.2.* (semver) Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/megaraid/megaraid_sas_base.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4bb34769ef44ab3770b89e4055de6af4a458bec9",
              "status": "affected",
              "version": "9b8b84879d4adc506b0d3944e20b28d9f3f6994b",
              "versionType": "git"
            },
            {
              "lessThan": "4dd118d06dec9efe5065ac7897bdc18f404a3af4",
              "status": "affected",
              "version": "9b8b84879d4adc506b0d3944e20b28d9f3f6994b",
              "versionType": "git"
            },
            {
              "lessThan": "af8c27375733fb6a6df9fa484cda77cc3dd0cb80",
              "status": "affected",
              "version": "9b8b84879d4adc506b0d3944e20b28d9f3f6994b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/megaraid/megaraid_sas_base.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.5",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc2",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: megaraid_sas: Limit NVMe request size to the PRP chain frame\n\nmegasas_make_prp_nvme() builds a command\u0027s PRP list in cmd-\u003esg_frame, a\nDMA pool buffer of instance-\u003emax_chain_frame_sz bytes, spending one\nentry per NVMe page of the transfer plus one per page of the buffer for\nthe chain pointer. The loop runs until the transfer is described and\nnever checks the buffer bound.\n\nmax_hw_sectors comes straight from the MDTS the firmware reports for the\ndrive. On drives with a large MDTS the only thing keeping the list\ninside the buffer was the block layer default of 1280 KiB, which needs\n320 entries, which fit into a 4 KiB frame as that holds 512. But since\ncommit 9b8b84879d4a (\"block: Increase BLK_DEF_MAX_SECTORS_CAP\") that\ndefault is 4 MiB, and such a transfer needs 1025 entries, so the list\nruns a full page past the end of the frame:\n\n  sd 1:0:1:0: [sdb] tag#630 page boundary ptr_sgl: 0x00000000ba62d13f\n  BUG: unable to handle page fault for address: ff663bcb81e7c000\n  #PF: supervisor write access in kernel mode\n  #PF: error_code(0x0002) - not-present page\n  RIP: 0010:megasas_build_and_issue_cmd_fusion+0xeaa/0x1870 [megaraid_sas]\n\nIf the page after the frame happens to be mapped, the overrun does not\nfault but silently corrupts the neighbouring pool entry, which is\nanother in-flight command\u0027s PRP list.\n\nCap max_hw_sectors at what the chain frame can describe, less one page\nfor transfers that do not start on a page boundary and so need one entry\nmore. This is the megaraid_sas counterpart of commit 04631f55afc5\n(\"scsi: mpt3sas: Limit NVMe request size to 2 MiB\"), but derives the\nlimit from max_chain_frame_sz rather than hardcoding it."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The overflow is in megaraid_sas while building NVMe PRP lists for SCSI commands from the local block layer (queuecommand \u2192 megasas_build_and_issue_cmd_fusion \u2192 megasas_make_prp_nvme); the HBA driver is not bound to the network stack.\nAC:L - On MegaRAID NVMe Fast Path with a firmware MDTS above the 4 KiB chain-frame capacity, a single 4 MiB I/O (the post-6.17 block-layer default) drives the unbounded PRP loop past cmd-\u003esg_frame with no race or other condition outside the attacker\u2019s control.\nPR:L - An unprivileged local user who can read or write a file or block device on the NVMe-backed volume can submit a large O_DIRECT or sequential I/O that the block layer issues as one request; the megaraid ioctl CAP_SYS_ADMIN check is not on this path.\nUI:N - The attacker triggers the overflow directly by submitting their own I/O; no separate victim action is required.\nS:U - The out-of-bounds write corrupts host-kernel DMA-pool memory of the same HBA; it is not a VM escape, IOMMU bypass, or other cross-authority impact.\nC:H - The write overruns the PRP chain frame into the neighbouring dma_pool object, another in-flight command\u2019s PRP list, so DMA can be redirected to attacker-controlled buffers and disclose other I/O or kernel memory.\nI:H - This is an unbounded out-of-bounds write of DMA addresses past a fixed-size sg_frame, corrupting adjacent kernel/DMA-pool memory and enabling integrity violation and control-flow or DMA hijacking.\nA:H - When the page after the frame is unmapped the overrun causes a kernel page-fault oops in megasas_build_and_issue_cmd_fusion, as documented in the fix; neighbouring-command corruption can also panic or hang the host."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T14:41:23.445Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4bb34769ef44ab3770b89e4055de6af4a458bec9"
        },
        {
          "url": "https://git.kernel.org/stable/c/4dd118d06dec9efe5065ac7897bdc18f404a3af4"
        },
        {
          "url": "https://git.kernel.org/stable/c/af8c27375733fb6a6df9fa484cda77cc3dd0cb80"
        }
      ],
      "title": "scsi: megaraid_sas: Limit NVMe request size to the PRP chain frame",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90008",
    "datePublished": "2026-09-16T10:33:16.772Z",
    "dateReserved": "2026-09-11T19:38:34.781Z",
    "dateUpdated": "2026-09-16T14:41:23.445Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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