Vulnerability-Lookup

GHSA-RR8J-Q4X4-G24R

Vulnerability from github – Published: 2024-05-01 15:30 – Updated: 2024-11-01 18:31

Details

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

tmpfs: fix race on handling dquot rbtree

A syzkaller reproducer found a race while attempting to remove dquot information from the rb tree.

Fetching the rb_tree root node must also be protected by the dqopt->dqio_sem, otherwise, giving the right timing, shmem_release_dquot() will trigger a warning because it couldn't find a node in the tree, when the real reason was the root node changing before the search starts:

Thread 1 Thread 2 - shmem_release_dquot() - shmem_{acquire,release}_dquot()

fetch ROOT - Fetch ROOT

            - acquire dqio_sem

wait dqio_sem

        - do something, triger a tree rebalance
        - release dqio_sem

acquire dqio_sem
start searching for the node, but from the wrong location, missing the node, and triggering a warning.

Severity

4.7 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2024-27058"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-01T13:15:50Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntmpfs: fix race on handling dquot rbtree\n\nA syzkaller reproducer found a race while attempting to remove dquot\ninformation from the rb tree.\n\nFetching the rb_tree root node must also be protected by the\ndqopt-\u003edqio_sem, otherwise, giving the right timing, shmem_release_dquot()\nwill trigger a warning because it couldn\u0027t find a node in the tree, when\nthe real reason was the root node changing before the search starts:\n\nThread 1\t\t\t\tThread 2\n- shmem_release_dquot()\t\t\t- shmem_{acquire,release}_dquot()\n\n- fetch ROOT\t\t\t\t- Fetch ROOT\n\n\t\t\t\t\t- acquire dqio_sem\n- wait dqio_sem\n\n\t\t\t\t\t- do something, triger a tree rebalance\n\t\t\t\t\t- release dqio_sem\n\n- acquire dqio_sem\n- start searching for the node, but\n  from the wrong location, missing\n  the node, and triggering a warning.",
  "id": "GHSA-rr8j-q4x4-g24r",
  "modified": "2024-11-01T18:31:25Z",
  "published": "2024-05-01T15:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-27058"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0a69b6b3a026543bc215ccc866d0aea5579e6ce2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/617d55b90e73c7b4aa2733ca6cc3f9b72d1124bb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7077f43f30d817d10a9f8245e51576ac114b2f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f82f184874d2761ebaa60dccf577921a0dbb3810"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-27058 (GCVE-0-2024-27058)

Vulnerability from cvelistv5 – Published: 2024-05-01 13:00 – Updated: 2026-08-05 11:29

Title

tmpfs: fix race on handling dquot rbtree

Summary

In the Linux kernel, the following vulnerability has been resolved: tmpfs: fix race on handling dquot rbtree A syzkaller reproducer found a race while attempting to remove dquot information from the rb tree. Fetching the rb_tree root node must also be protected by the dqopt->dqio_sem, otherwise, giving the right timing, shmem_release_dquot() will trigger a warning because it couldn't find a node in the tree, when the real reason was the root node changing before the search starts: Thread 1 Thread 2 - shmem_release_dquot() - shmem_{acquire,release}_dquot() - fetch ROOT - Fetch ROOT - acquire dqio_sem - wait dqio_sem - do something, triger a tree rebalance - release dqio_sem - acquire dqio_sem - start searching for the node, but from the wrong location, missing the node, and triggering a warning.

Severity

7.8 (High)


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

4.7 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-05-17 15:12 UTC

CWE

CWE-noinfo Not enough information

Assigner

Linux mitre root Scorecard

References

4 references

URL	Tags
https://git.kernel.org/stable/c/c7077f43f30d817d1…
https://git.kernel.org/stable/c/617d55b90e73c7b4a…
https://git.kernel.org/stable/c/f82f184874d2761eb…
https://git.kernel.org/stable/c/0a69b6b3a026543bc…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: eafc474e202978ac735c551d5ee1eb8c02e2be54 , < c7077f43f30d817d10a9f8245e51576ac114b2f0 (git) Affected: eafc474e202978ac735c551d5ee1eb8c02e2be54 , < 617d55b90e73c7b4aa2733ca6cc3f9b72d1124bb (git) Affected: eafc474e202978ac735c551d5ee1eb8c02e2be54 , < f82f184874d2761ebaa60dccf577921a0dbb3810 (git) Affected: eafc474e202978ac735c551d5ee1eb8c02e2be54 , < 0a69b6b3a026543bc215ccc866d0aea5579e6ce2 (git)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.24 , ≤ 6.6.* (semver) Unaffected: 6.7.12 , ≤ 6.7.* (semver) Unaffected: 6.8.3 , ≤ 6.8.* (semver) Unaffected: 6.9 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 4.7,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "HIGH",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-27058",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-17T15:12:32.083830Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "description": "CWE-noinfo Not enough information",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-01T17:11:16.996Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T00:21:05.876Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/c7077f43f30d817d10a9f8245e51576ac114b2f0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/617d55b90e73c7b4aa2733ca6cc3f9b72d1124bb"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/f82f184874d2761ebaa60dccf577921a0dbb3810"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/0a69b6b3a026543bc215ccc866d0aea5579e6ce2"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/shmem_quota.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c7077f43f30d817d10a9f8245e51576ac114b2f0",
              "status": "affected",
              "version": "eafc474e202978ac735c551d5ee1eb8c02e2be54",
              "versionType": "git"
            },
            {
              "lessThan": "617d55b90e73c7b4aa2733ca6cc3f9b72d1124bb",
              "status": "affected",
              "version": "eafc474e202978ac735c551d5ee1eb8c02e2be54",
              "versionType": "git"
            },
            {
              "lessThan": "f82f184874d2761ebaa60dccf577921a0dbb3810",
              "status": "affected",
              "version": "eafc474e202978ac735c551d5ee1eb8c02e2be54",
              "versionType": "git"
            },
            {
              "lessThan": "0a69b6b3a026543bc215ccc866d0aea5579e6ce2",
              "status": "affected",
              "version": "eafc474e202978ac735c551d5ee1eb8c02e2be54",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/shmem_quota.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.24",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7.12",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.3",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntmpfs: fix race on handling dquot rbtree\n\nA syzkaller reproducer found a race while attempting to remove dquot\ninformation from the rb tree.\n\nFetching the rb_tree root node must also be protected by the\ndqopt-\u003edqio_sem, otherwise, giving the right timing, shmem_release_dquot()\nwill trigger a warning because it couldn\u0027t find a node in the tree, when\nthe real reason was the root node changing before the search starts:\n\nThread 1\t\t\t\tThread 2\n- shmem_release_dquot()\t\t\t- shmem_{acquire,release}_dquot()\n\n- fetch ROOT\t\t\t\t- Fetch ROOT\n\n\t\t\t\t\t- acquire dqio_sem\n- wait dqio_sem\n\n\t\t\t\t\t- do something, triger a tree rebalance\n\t\t\t\t\t- release dqio_sem\n\n- acquire dqio_sem\n- start searching for the node, but\n  from the wrong location, missing\n  the node, and triggering a warning."
        }
      ],
      "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 vulnerable code is reached through local filesystem operations (create/chgrp/unlink) on a quota-enabled tmpfs and through the quotactl syscall; there is no network-facing path.\nAC:L - The attacker controls both sides of the race \u2014 spawning concurrent threads that force rb-tree insertions/rotations via dquot_initialize()/dquot_transfer() while the quota release worker walks the tree from its stale root \u2014 and the window spans two blocking lock acquisitions (dq_lock, then dqio_sem) that the attacker can widen by contending dqio_sem; a syzkaller reproducer exists.\nPR:L - Only an unprivileged local user with write access to the quota-enabled tmpfs is needed, since shmem_acquire_dquot()/shmem_release_dquot() run on ordinary inode creation and chown/chgrp with no capability check; enabling quota at mount time is an administrator-side deployment precondition, not an attacker privilege.\nUI:N - The attacker triggers the race entirely from their own processes doing normal file operations; no action by any other user is required.\nS:U - The corruption and crash are confined to the kernel\u0027s own memory and the tmpfs quota subsystem, with no crossing into another security authority such as a hypervisor or IOMMU boundary.\nC:H - Because the root is fetched outside dqio_sem, the traversal can continue into a quota_id object that a concurrent shmem_release_dquot() already rb_erase()d and kfree()d, reading entry-\u003eid and following rb_left/rb_right out of freed kmalloc-64 memory that can be groomed with attacker data, and via Q_GETNEXTQUOTA that freed content is returned to userspace as a qid.\nI:H - After following stale/freed tree pointers the found: path stores four attacker-influenced 64-bit limit values into the located \"entry\", then rb_erase()s and kfree()s it, giving writes and a free against a reallocated heap object \u2014 heap corruption exploitable beyond a simple crash.\nA:H - The race reliably triggers WARN_ONCE() in shmem_release_dquot() (a panic under panic_on_warn) and returns -ENOENT with DQ_ACTIVE_B still set, so quota_release_workfn() restarts on the same dquot and can spin, stalling all quota releases and blocking flush_delayed_work()/quotaoff/umount; the unlocked info-\u003edqi_priv deref in shmem_get_next_id() also NULL-derefs before its sb_has_quota_active() check."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:29:17.454Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c7077f43f30d817d10a9f8245e51576ac114b2f0"
        },
        {
          "url": "https://git.kernel.org/stable/c/617d55b90e73c7b4aa2733ca6cc3f9b72d1124bb"
        },
        {
          "url": "https://git.kernel.org/stable/c/f82f184874d2761ebaa60dccf577921a0dbb3810"
        },
        {
          "url": "https://git.kernel.org/stable/c/0a69b6b3a026543bc215ccc866d0aea5579e6ce2"
        }
      ],
      "title": "tmpfs: fix race on handling dquot rbtree",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-27058",
    "datePublished": "2024-05-01T13:00:06.852Z",
    "dateReserved": "2024-02-19T14:20:24.214Z",
    "dateUpdated": "2026-08-05T11:29:17.454Z",
    "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.

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

GHSA-RR8J-Q4X4-G24R

CVE-2024-27058 (GCVE-0-2024-27058)

Tags

Sightings

Nomenclature

Related by attack behaviour