Vulnerability-Lookup

FKIE_CVE-2023-53608

Vulnerability from fkie_nvd - Published: 2025-10-04 16:15 - Updated: 2026-08-04 10:19

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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: nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread() The finalization of nilfs_segctor_thread() can race with nilfs_segctor_kill_thread() which terminates that thread, potentially causing a use-after-free BUG as KASAN detected. At the end of nilfs_segctor_thread(), it assigns NULL to "sc_task" member of "struct nilfs_sc_info" to indicate the thread has finished, and then notifies nilfs_segctor_kill_thread() of this using waitqueue "sc_wait_task" on the struct nilfs_sc_info. However, here, immediately after the NULL assignment to "sc_task", it is possible that nilfs_segctor_kill_thread() will detect it and return to continue the deallocation, freeing the nilfs_sc_info structure before the thread does the notification. This fixes the issue by protecting the NULL assignment to "sc_task" and its notification, with spinlock "sc_state_lock" of the struct nilfs_sc_info. Since nilfs_segctor_kill_thread() does a final check to see if "sc_task" is NULL with "sc_state_lock" locked, this can eliminate the race.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/034cce77d52ba013ce62b4f5258c29907eb1ada5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0dbf0e64b91ee8fcb278aea93eb06fc7d56ecbcc	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/613bf23c070d11c525268f2945aa594704a9b764	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6be49d100c22ffea3287a4b19d7639d259888e33	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/92684e02654c91a61a0b0561433b710bcece19fe	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b4d80bd6370b81a1725b6b8f7894802c23a14e9f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bae009a2f1b7c2011d2e92d8c84868d315c0b97e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f32297dba338dc06d62286dedb3cdbd5175b1719	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.3
linux	linux_kernel	6.3
linux	linux_kernel	6.3
linux	linux_kernel	6.3
linux	linux_kernel	6.3

JSON

To clipboard

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          "product": "Linux",
          "programFiles": [
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "4.19.281",
              "versionType": "semver"
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          "negate": false,
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      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread()\n\nThe finalization of nilfs_segctor_thread() can race with\nnilfs_segctor_kill_thread() which terminates that thread, potentially\ncausing a use-after-free BUG as KASAN detected.\n\nAt the end of nilfs_segctor_thread(), it assigns NULL to \"sc_task\" member\nof \"struct nilfs_sc_info\" to indicate the thread has finished, and then\nnotifies nilfs_segctor_kill_thread() of this using waitqueue\n\"sc_wait_task\" on the struct nilfs_sc_info.\n\nHowever, here, immediately after the NULL assignment to \"sc_task\", it is\npossible that nilfs_segctor_kill_thread() will detect it and return to\ncontinue the deallocation, freeing the nilfs_sc_info structure before the\nthread does the notification.\n\nThis fixes the issue by protecting the NULL assignment to \"sc_task\" and\nits notification, with spinlock \"sc_state_lock\" of the struct\nnilfs_sc_info.  Since nilfs_segctor_kill_thread() does a final check to\nsee if \"sc_task\" is NULL with \"sc_state_lock\" locked, this can eliminate\nthe race."
    }
  ],
  "id": "CVE-2023-53608",
  "lastModified": "2026-08-04T10:19:14.360",
  "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"
      },
      {
        "cvssData": {
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          "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": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-10-04T16:15:57.527",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/034cce77d52ba013ce62b4f5258c29907eb1ada5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/0dbf0e64b91ee8fcb278aea93eb06fc7d56ecbcc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/613bf23c070d11c525268f2945aa594704a9b764"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/6be49d100c22ffea3287a4b19d7639d259888e33"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/92684e02654c91a61a0b0561433b710bcece19fe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b4d80bd6370b81a1725b6b8f7894802c23a14e9f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bae009a2f1b7c2011d2e92d8c84868d315c0b97e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/f32297dba338dc06d62286dedb3cdbd5175b1719"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2023-53608 (GCVE-0-2023-53608)

Vulnerability from cvelistv5 – Published: 2025-10-04 15:44 – Updated: 2026-08-05 09:15

Title

nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread()

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 CNA under the mitre root

CNA scorecard D 53/100 over 6856 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/034cce77d52ba013c…
https://git.kernel.org/stable/c/0dbf0e64b91ee8fcb…
https://git.kernel.org/stable/c/613bf23c070d11c52…
https://git.kernel.org/stable/c/f32297dba338dc06d…
https://git.kernel.org/stable/c/92684e02654c91a61…
https://git.kernel.org/stable/c/bae009a2f1b7c2011…
https://git.kernel.org/stable/c/b4d80bd6370b81a17…
https://git.kernel.org/stable/c/6be49d100c22ffea3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < 034cce77d52ba013ce62b4f5258c29907eb1ada5 (git) Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < 0dbf0e64b91ee8fcb278aea93eb06fc7d56ecbcc (git) Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < 613bf23c070d11c525268f2945aa594704a9b764 (git) Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < f32297dba338dc06d62286dedb3cdbd5175b1719 (git) Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < 92684e02654c91a61a0b0561433b710bcece19fe (git) Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < bae009a2f1b7c2011d2e92d8c84868d315c0b97e (git) Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < b4d80bd6370b81a1725b6b8f7894802c23a14e9f (git) Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < 6be49d100c22ffea3287a4b19d7639d259888e33 (git)
Linux	Linux	Affected: 2.6.30 Unaffected: 0 , < 2.6.30 (semver) Unaffected: 4.14.313 , ≤ 4.14.* (semver) Unaffected: 4.19.281 , ≤ 4.19.* (semver) Unaffected: 5.4.241 , ≤ 5.4.* (semver) Unaffected: 5.10.178 , ≤ 5.10.* (semver) Unaffected: 5.15.107 , ≤ 5.15.* (semver) Unaffected: 6.1.24 , ≤ 6.1.* (semver) Unaffected: 6.2.11 , ≤ 6.2.* (semver) Unaffected: 6.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nilfs2/segment.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
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              "status": "unaffected",
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              "versionType": "semver"
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              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.281",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.241",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.107",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.313",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.281",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.241",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.178",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.107",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.24",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.11",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread()\n\nThe finalization of nilfs_segctor_thread() can race with\nnilfs_segctor_kill_thread() which terminates that thread, potentially\ncausing a use-after-free BUG as KASAN detected.\n\nAt the end of nilfs_segctor_thread(), it assigns NULL to \"sc_task\" member\nof \"struct nilfs_sc_info\" to indicate the thread has finished, and then\nnotifies nilfs_segctor_kill_thread() of this using waitqueue\n\"sc_wait_task\" on the struct nilfs_sc_info.\n\nHowever, here, immediately after the NULL assignment to \"sc_task\", it is\npossible that nilfs_segctor_kill_thread() will detect it and return to\ncontinue the deallocation, freeing the nilfs_sc_info structure before the\nthread does the notification.\n\nThis fixes the issue by protecting the NULL assignment to \"sc_task\" and\nits notification, with spinlock \"sc_state_lock\" of the struct\nnilfs_sc_info.  Since nilfs_segctor_kill_thread() does a final check to\nsee if \"sc_task\" is NULL with \"sc_state_lock\" locked, this can eliminate\nthe race."
        }
      ],
      "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 race is only reachable through local filesystem operations \u2014 mount(2)/umount(2) of a nilfs2 volume (or the mount-time rollforward recovery attach/detach in nilfs_salvage_orphan_logs()). No network or peer-supplied data reaches nilfs_segctor_thread()/nilfs_segctor_kill_thread().\nAC:L - The attacker creates both sides of the race: the unmount/teardown request is what wakes the segctord kthread and drives it to end_thread, and the attempt can be repeated indefinitely via mount/unmount cycles (a recovery-requiring image makes even a plain mount start and kill the thread), with the preemption window widened by ordinary CPU contention.\nPR:L - An unprivileged local user reaches the teardown path on any ordinary desktop/kiosk through removable-media automount (udisks2/autofs mounts and unmounts a nilfs2 volume on the session user\u0027s behalf) or `user` fstab entries; no capability check is performed inside the racing code itself, consistent with other unmount-path filesystem teardown CVEs.\nUI:N - The attacker performs the mount/unmount cycling themselves; no separate victim has to open a file, run a command, or take any action for the race to be triggered.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; no VM, IOMMU, container, or sandbox boundary is crossed.\nC:H - After kfree(sci) the kthread\u0027s wake_up() walks sci-\u003esc_wait_task\u0027s list from the freed ~kmalloc-512 slot, so a reclaiming spray lets the attacker steer the traversal and the curr-\u003efunc() indirect call, yielding kernel-memory disclosure; per UAF guidance this is High.\nI:H - wake_up() on the freed object performs a spinlock write into freed memory, list_del-style pointer writes on attacker-controlled list entries, and an indirect call through curr-\u003efunc \u2014 a write and control-flow-hijack primitive exploitable for privilege escalation.\nA:H - The bug was reported by syzbot as a KASAN-detected use-after-free BUG; locking and dereferencing freed slab memory reliably produces an oops or panic even without successful exploitation."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:15:06.157Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/034cce77d52ba013ce62b4f5258c29907eb1ada5"
        },
        {
          "url": "https://git.kernel.org/stable/c/0dbf0e64b91ee8fcb278aea93eb06fc7d56ecbcc"
        },
        {
          "url": "https://git.kernel.org/stable/c/613bf23c070d11c525268f2945aa594704a9b764"
        },
        {
          "url": "https://git.kernel.org/stable/c/f32297dba338dc06d62286dedb3cdbd5175b1719"
        },
        {
          "url": "https://git.kernel.org/stable/c/92684e02654c91a61a0b0561433b710bcece19fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/bae009a2f1b7c2011d2e92d8c84868d315c0b97e"
        },
        {
          "url": "https://git.kernel.org/stable/c/b4d80bd6370b81a1725b6b8f7894802c23a14e9f"
        },
        {
          "url": "https://git.kernel.org/stable/c/6be49d100c22ffea3287a4b19d7639d259888e33"
        }
      ],
      "title": "nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53608",
    "datePublished": "2025-10-04T15:44:17.302Z",
    "dateReserved": "2025-10-04T15:40:38.480Z",
    "dateUpdated": "2026-08-05T09:15:06.157Z",
    "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

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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.

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