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CVE-2024-45023 (GCVE-0-2024-45023)

Vulnerability from cvelistv5 – Published: 2024-09-11 15:13 – Updated: 2026-08-05 11:37
VLAI
Title
md/raid1: Fix data corruption for degraded array with slow disk
Summary
In the Linux kernel, the following vulnerability has been resolved: md/raid1: Fix data corruption for degraded array with slow disk read_balance() will avoid reading from slow disks as much as possible, however, if valid data only lands in slow disks, and a new normal disk is still in recovery, unrecovered data can be read: raid1_read_request read_balance raid1_should_read_first -> return false choose_best_rdev -> normal disk is not recovered, return -1 choose_bb_rdev -> missing the checking of recovery, return the normal disk -> read unrecovered data Root cause is that the checking of recovery is missing in choose_bb_rdev(). Hence add such checking to fix the problem. Also fix similar problem in choose_slow_rdev().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-29 15:47 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: dfa8ecd167c1753d4fc24a517e1d79c603183c94 , < 2febf5fdbf5d9a52ddc3e986971c8609b1582d67 (git)
Affected: dfa8ecd167c1753d4fc24a517e1d79c603183c94 , < c916ca35308d3187c9928664f9be249b22a3a701 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.10.7 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                  "lang": "en",
                  "value": "AV:L - The vulnerable code is the md/raid1 read path, reached by submitting a READ bio to the local md block device \u2014 via a normal file read on a mounted filesystem or a direct block-device read. No remote protocol input is involved.\nAC:L - There is no race, timing window, or memory-layout dependency; once the array is in the ordinary and frequently occurring degraded-plus-rebuilding state (write-mostly member holding valid data, or surviving member with recorded badblocks), every read in the unrecovered range deterministically selects the wrong disk and returns bad data with repeatable success.\nPR:L - No capability or permission check exists anywhere on the raid1_make_request \u2192 raid1_read_request \u2192 read_balance path; any local unprivileged user reading a file on the filesystem backed by the array triggers the faulty disk selection.\nUI:N - No victim action is required \u2014 the recovery state is driven by the kernel\u0027s background rebuild, and the corrupt reads occur on the attacker\u0027s own I/O as well as on all normal system I/O.\nS:U - The faulty disk selection and its consequences are confined to the md block device and the kernel storage stack, the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Reads are served from sectors of the replacement member that have not yet been rebuilt, returning that disk\u0027s prior contents \u2014 stale blocks from a re-added or repurposed drive that under the current filesystem layout can belong to other users\u0027 or root-owned files \u2014 so an unprivileged reader obtains data it is not authorized to see.\nI:H - The array silently returns wrong data instead of valid data or an I/O error, and any read-modify-write above md (filesystem metadata, journal, sub-block or database updates) writes that garbage back, after which raid1_write_request() mirrors it to all members and the corruption becomes permanent and unrecoverable.\nA:H - Corrupted metadata delivered to the filesystem drives error handling into forced read-only remount, XFS shutdown, or panic on errors=panic, and the persisted corruption destroys the array\u0027s data \u2014 loss of availability of the storage and potentially of the ability to boot."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T11:37:48.080Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/2febf5fdbf5d9a52ddc3e986971c8609b1582d67"
            },
            {
              "url": "https://git.kernel.org/stable/c/c916ca35308d3187c9928664f9be249b22a3a701"
            }
          ],
          "title": "md/raid1: Fix data corruption for degraded array with slow disk",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-45023",
        "datePublished": "2024-09-11T15:13:56.451Z",
        "dateReserved": "2024-08-21T05:34:56.684Z",
        "dateUpdated": "2026-08-05T11:37:48.080Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.