Vulnerability-Lookup

FKIE_CVE-2026-23423

Vulnerability from fkie_nvd - Published: 2026-04-03 14:16 - Updated: 2026-07-24 21:10

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: btrfs: free pages on error in btrfs_uring_read_extent() In this function the 'pages' object is never freed in the hopes that it is picked up by btrfs_uring_read_finished() whenever that executes in the future. But that's just the happy path. Along the way previous allocations might have gone wrong, or we might not get -EIOCBQUEUED from btrfs_encoded_read_regular_fill_pages(). In all these cases, we go to a cleanup section that frees all memory allocated by this function without assuming any deferred execution, and this also needs to happen for the 'pages' allocation.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3f501412f2079ca14bf68a18d80a2b7a823f1f64	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/628895890b0c9ac9129129e89455da7db95ba343	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d4f210de01eaccac61eee657f676045ef9771d07	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.13
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/ioctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d4f210de01eaccac61eee657f676045ef9771d07",
              "status": "affected",
              "version": "34310c442e175f286b4c06ab5caa4e0b267ea31c",
              "versionType": "git"
            },
            {
              "lessThan": "628895890b0c9ac9129129e89455da7db95ba343",
              "status": "affected",
              "version": "34310c442e175f286b4c06ab5caa4e0b267ea31c",
              "versionType": "git"
            },
            {
              "lessThan": "3f501412f2079ca14bf68a18d80a2b7a823f1f64",
              "status": "affected",
              "version": "34310c442e175f286b4c06ab5caa4e0b267ea31c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/ioctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "40E7536C-DA22-4B7D-9953-0343B4D9A3E6",
              "versionEndExcluding": "6.18.17",
              "versionStartIncluding": "6.13.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "69245D10-0B71-485E-80C3-A64F077004D3",
              "versionEndExcluding": "6.19.7",
              "versionStartIncluding": "6.19",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:*",
              "matchCriteriaId": "5A3F9505-6B98-4269-8B81-127E55A1BF00",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*",
              "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: free pages on error in btrfs_uring_read_extent()\n\nIn this function the \u0027pages\u0027 object is never freed in the hopes that it is\npicked up by btrfs_uring_read_finished() whenever that executes in the\nfuture. But that\u0027s just the happy path. Along the way previous\nallocations might have gone wrong, or we might not get -EIOCBQUEUED from\nbtrfs_encoded_read_regular_fill_pages(). In all these cases, we go to a\ncleanup section that frees all memory allocated by this function without\nassuming any deferred execution, and this also needs to happen for the\n\u0027pages\u0027 allocation."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbtrfs: liberar p\u00e1ginas en caso de error en btrfs_uring_read_extent()\n\nEn esta funci\u00f3n, el objeto \u0027pages\u0027 nunca se libera con la esperanza de que sea recogido por btrfs_uring_read_finished() cada vez que se ejecute en el futuro. Pero ese es solo el camino feliz. En el camino, asignaciones anteriores podr\u00edan haber salido mal, o podr\u00edamos no obtener -EIOCBQUEUED de btrfs_encoded_read_regular_fill_pages(). En todos estos casos, vamos a una secci\u00f3n de limpieza que libera toda la memoria asignada por esta funci\u00f3n sin asumir ninguna ejecuci\u00f3n diferida, y esto tambi\u00e9n debe ocurrir para la asignaci\u00f3n de \u0027pages\u0027."
    }
  ],
  "id": "CVE-2026-23423",
  "lastModified": "2026-07-24T21:10:00.143",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-04-03T14:16:28.487",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/3f501412f2079ca14bf68a18d80a2b7a823f1f64"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/628895890b0c9ac9129129e89455da7db95ba343"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d4f210de01eaccac61eee657f676045ef9771d07"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-23423 (GCVE-0-2026-23423)

Vulnerability from cvelistv5 – Published: 2026-04-03 13:24 – Updated: 2026-05-11 22:06

Title

btrfs: free pages on error in btrfs_uring_read_extent()

Summary

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6847 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/d4f210de01eaccac6…
https://git.kernel.org/stable/c/628895890b0c9ac91…
https://git.kernel.org/stable/c/3f501412f2079ca14…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 34310c442e175f286b4c06ab5caa4e0b267ea31c , < d4f210de01eaccac61eee657f676045ef9771d07 (git) Affected: 34310c442e175f286b4c06ab5caa4e0b267ea31c , < 628895890b0c9ac9129129e89455da7db95ba343 (git) Affected: 34310c442e175f286b4c06ab5caa4e0b267ea31c , < 3f501412f2079ca14bf68a18d80a2b7a823f1f64 (git)
Linux	Linux	Affected: 6.13 Unaffected: 0 , < 6.13 (semver) Unaffected: 6.18.17 , ≤ 6.18.* (semver) Unaffected: 6.19.7 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/ioctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d4f210de01eaccac61eee657f676045ef9771d07",
              "status": "affected",
              "version": "34310c442e175f286b4c06ab5caa4e0b267ea31c",
              "versionType": "git"
            },
            {
              "lessThan": "628895890b0c9ac9129129e89455da7db95ba343",
              "status": "affected",
              "version": "34310c442e175f286b4c06ab5caa4e0b267ea31c",
              "versionType": "git"
            },
            {
              "lessThan": "3f501412f2079ca14bf68a18d80a2b7a823f1f64",
              "status": "affected",
              "version": "34310c442e175f286b4c06ab5caa4e0b267ea31c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/ioctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.17",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.7",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: free pages on error in btrfs_uring_read_extent()\n\nIn this function the \u0027pages\u0027 object is never freed in the hopes that it is\npicked up by btrfs_uring_read_finished() whenever that executes in the\nfuture. But that\u0027s just the happy path. Along the way previous\nallocations might have gone wrong, or we might not get -EIOCBQUEUED from\nbtrfs_encoded_read_regular_fill_pages(). In all these cases, we go to a\ncleanup section that frees all memory allocated by this function without\nassuming any deferred execution, and this also needs to happen for the\n\u0027pages\u0027 allocation."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:06:37.271Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d4f210de01eaccac61eee657f676045ef9771d07"
        },
        {
          "url": "https://git.kernel.org/stable/c/628895890b0c9ac9129129e89455da7db95ba343"
        },
        {
          "url": "https://git.kernel.org/stable/c/3f501412f2079ca14bf68a18d80a2b7a823f1f64"
        }
      ],
      "title": "btrfs: free pages on error in btrfs_uring_read_extent()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23423",
    "datePublished": "2026-04-03T13:24:31.966Z",
    "dateReserved": "2026-01-13T15:37:46.015Z",
    "dateUpdated": "2026-05-11T22:06:37.271Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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

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.

Action not permitted