Vulnerability-Lookup

GHSA-76HH-2V3C-VM3V

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-06-01 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

md/raid5: validate payload size before accessing journal metadata

r5c_recovery_analyze_meta_block() and r5l_recovery_verify_data_checksum_for_mb() iterate over payloads in a journal metadata block using on-disk payload size fields without validating them against the remaining space in the metadata block.

A corrupted journal contains payload sizes extending beyond the PAGE_SIZE boundary can cause out-of-bounds reads when accessing payload fields or computing offsets.

Add bounds validation for each payload type to ensure the full payload fits within meta_size before processing.

Severity

7.1 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46070"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:28Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5: validate payload size before accessing journal metadata\n\nr5c_recovery_analyze_meta_block() and\nr5l_recovery_verify_data_checksum_for_mb() iterate over payloads in a\njournal metadata block using on-disk payload size fields without\nvalidating them against the remaining space in the metadata block.\n\nA corrupted journal contains payload sizes extending beyond the PAGE_SIZE\nboundary can cause out-of-bounds reads when accessing payload fields or\ncomputing offsets.\n\nAdd bounds validation for each payload type to ensure the full payload\nfits within meta_size before processing.",
  "id": "GHSA-76hh-2v3c-vm3v",
  "modified": "2026-06-01T18:31:35Z",
  "published": "2026-05-27T15:33:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46070"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/28d3ff7109c66e99dc1b7cddacb5c760849620ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/33698bd1b2db9764a29df7751533d33967ff5c98"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/406aa86394ead347c47428fb51b6359bdaa2257d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/73ce72edd113374801045924d4417199963f73a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0cc3ae97e893bf54bbce447f4e9fd2e0b88bff9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c3a1cf78bd1bbb51b2cc5189b4743056553c1e0e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c96c6f01d84b5c67db1bf1cc8591c0b7146826fc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef4851d8324fd978ca1ff9ec76a275438f887743"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-46070 (GCVE-0-2026-46070)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:57 – Updated: 2026-08-05 12:29

Title

md/raid5: validate payload size before accessing journal metadata

Summary

In the Linux kernel, the following vulnerability has been resolved: md/raid5: validate payload size before accessing journal metadata r5c_recovery_analyze_meta_block() and r5l_recovery_verify_data_checksum_for_mb() iterate over payloads in a journal metadata block using on-disk payload size fields without validating them against the remaining space in the metadata block. A corrupted journal contains payload sizes extending beyond the PAGE_SIZE boundary can cause out-of-bounds reads when accessing payload fields or computing offsets. Add bounds validation for each payload type to ensure the full payload fits within meta_size before processing.

Severity

7.1 (High)


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

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/c96c6f01d84b5c67d…
https://git.kernel.org/stable/c/ef4851d8324fd978c…
https://git.kernel.org/stable/c/28d3ff7109c66e99d…
https://git.kernel.org/stable/c/33698bd1b2db9764a…
https://git.kernel.org/stable/c/c3a1cf78bd1bbb51b…
https://git.kernel.org/stable/c/73ce72edd11337480…
https://git.kernel.org/stable/c/406aa86394ead347c…
https://git.kernel.org/stable/c/b0cc3ae97e893bf54…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b4c625c67362b3940f619c1a836b4e8329106658 , < c96c6f01d84b5c67db1bf1cc8591c0b7146826fc (git) Affected: b4c625c67362b3940f619c1a836b4e8329106658 , < ef4851d8324fd978ca1ff9ec76a275438f887743 (git) Affected: b4c625c67362b3940f619c1a836b4e8329106658 , < 28d3ff7109c66e99dc1b7cddacb5c760849620ef (git) Affected: b4c625c67362b3940f619c1a836b4e8329106658 , < 33698bd1b2db9764a29df7751533d33967ff5c98 (git) Affected: b4c625c67362b3940f619c1a836b4e8329106658 , < c3a1cf78bd1bbb51b2cc5189b4743056553c1e0e (git) Affected: b4c625c67362b3940f619c1a836b4e8329106658 , < 73ce72edd113374801045924d4417199963f73a3 (git) Affected: b4c625c67362b3940f619c1a836b4e8329106658 , < 406aa86394ead347c47428fb51b6359bdaa2257d (git) Affected: b4c625c67362b3940f619c1a836b4e8329106658 , < b0cc3ae97e893bf54bbce447f4e9fd2e0b88bff9 (git)
Linux	Linux	Affected: 4.10 Unaffected: 0 , < 4.10 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.86 , ≤ 6.12.* (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/raid5-cache.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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            },
            {
              "lessThan": "28d3ff7109c66e99dc1b7cddacb5c760849620ef",
              "status": "affected",
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              "versionType": "git"
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              "version": "4.10"
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            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.86",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.27",
              "versionType": "semver"
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              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5: validate payload size before accessing journal metadata\n\nr5c_recovery_analyze_meta_block() and\nr5l_recovery_verify_data_checksum_for_mb() iterate over payloads in a\njournal metadata block using on-disk payload size fields without\nvalidating them against the remaining space in the metadata block.\n\nA corrupted journal contains payload sizes extending beyond the PAGE_SIZE\nboundary can cause out-of-bounds reads when accessing payload fields or\ncomputing offsets.\n\nAdd bounds validation for each payload type to ensure the full payload\nfits within meta_size before processing."
        }
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              "value": "AV:L - The malicious input is the on-disk journal metadata processed during local MD array assembly/start; it is not a network-facing service. Even when the journal sits on remote storage, the vulnerable recovery code runs locally against a block device, so the vector is Local.\nAC:L - A crafted journal block deterministically triggers the OOB read on every assembly; the required CRC is fully attacker-computable from the publicly-stored array UUID, and there is no race or uncontrolled condition.\nPR:L - Exploitation only requires planting crafted bytes on the journal block device (e.g. disk-group/device write access), after which routine or boot-time auto-assembly processes it; this is a low-privilege primitive rather than full init-namespace root.\nUI:N - Array assembly/journal recovery runs automatically at boot or device hot-plug, so no human interaction is needed once the corrupted journal is in place.\nS:U - The OOB read stays within the kernel\u0027s own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The flaw is a large, unbounded out-of-bounds read of adjacent kernel memory (FLUSH count up to ~500M entries), which per scoring guidance for unbounded OOB reads is treated as a high confidentiality impact.\nI:N - The fix adds only read-bounds validation; the vulnerability provides no out-of-bounds write or corruption primitive against system data, so there is no integrity impact.\nA:H - OOB access to unmapped memory (or the int overflow / BUG_ON in the read path) causes a kernel oops/panic, crashing the host during array assembly."
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        "dateUpdated": "2026-08-05T12:29:28.864Z",
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      "title": "md/raid5: validate payload size before accessing journal metadata",
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    "cveId": "CVE-2026-46070",
    "datePublished": "2026-05-27T12:57:54.345Z",
    "dateReserved": "2026-05-13T15:03:33.095Z",
    "dateUpdated": "2026-08-05T12:29:28.864Z",
    "state": "PUBLISHED"
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}

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.

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.

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GHSA-76HH-2V3C-VM3V

CVE-2026-46070 (GCVE-0-2026-46070)

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