Vulnerability-Lookup

FKIE_CVE-2024-58087

Vulnerability from fkie_nvd - Published: 2025-03-12 08:15 - Updated: 2026-08-04 11:22

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix racy issue from session lookup and expire Increment the session reference count within the lock for lookup to avoid racy issue with session expire.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2107ab40629aeabbec369cf34b8cf0f288c3eb1b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/37a0e2b362b3150317fb6e2139de67b1e29ae5ff	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/450a844c045ff0895d41b05a1cbe8febd1acfcfd	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a39e31e22a535d47b14656a7d6a893c7f6cf758c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b95629435b84b9ecc0c765995204a4d8a913ed52	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://www.zerodayinitiative.com/advisories/ZDI-25-100/	Patch, Third Party Advisory

Impacted products

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

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/auth.c",
            "fs/smb/server/mgmt/user_session.c",
            "fs/smb/server/server.c",
            "fs/smb/server/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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            },
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          ]
        },
        {
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          "product": "Linux",
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            "fs/smb/server/auth.c",
            "fs/smb/server/mgmt/user_session.c",
            "fs/smb/server/server.c",
            "fs/smb/server/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "version": "0",
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            },
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              "status": "unaffected",
              "version": "6.12.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
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          ]
        }
      ],
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    }
  ],
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    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: corrige problema de rapidez en la b\u00fasqueda y expiraci\u00f3n de la sesi\u00f3n Incrementa el recuento de referencia de sesi\u00f3n dentro del bloqueo para la b\u00fasqueda para evitar problemas de rapidez con la expiraci\u00f3n de la sesi\u00f3n."
    }
  ],
  "id": "CVE-2024-58087",
  "lastModified": "2026-08-04T11:22:38.603",
  "metrics": {
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  "published": "2025-03-12T08:15:11.810",
  "references": [
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  ]
}

CVE-2024-58087 (GCVE-0-2024-58087)

Vulnerability from cvelistv5 – Published: 2025-03-12 07:28 – Updated: 2026-08-05 11:47

Title

ksmbd: fix racy issue from session lookup and expire

Summary

Severity

9.8 (Critical)


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

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 19:26 UTC

CWE

CWE-667 - Improper Locking

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/2107ab40629aeabbe…
https://git.kernel.org/stable/c/37a0e2b362b315031…
https://git.kernel.org/stable/c/450a844c045ff0895…
https://git.kernel.org/stable/c/a39e31e22a535d47b…
https://git.kernel.org/stable/c/b95629435b84b9ecc…
https://www.zerodayinitiative.com/advisories/ZDI-…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 2107ab40629aeabbec369cf34b8cf0f288c3eb1b (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 37a0e2b362b3150317fb6e2139de67b1e29ae5ff (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 450a844c045ff0895d41b05a1cbe8febd1acfcfd (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < a39e31e22a535d47b14656a7d6a893c7f6cf758c (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < b95629435b84b9ecc0c765995204a4d8a913ed52 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 5.15.176 , ≤ 5.15.* (semver) Unaffected: 6.1.121 , ≤ 6.1.* (semver) Unaffected: 6.6.67 , ≤ 6.6.* (semver) Unaffected: 6.12.6 , ≤ 6.12.* (semver) Unaffected: 6.13 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
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              "confidentialityImpact": "HIGH",
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              "privilegesRequired": "NONE",
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              "version": "3.1"
            }
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          {
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                    "Exploitation": "none"
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
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          "product": "Linux",
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            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - ksmbd is the in-kernel SMB server processing requests received on TCP port 445; every affected path (`smb2_sess_setup`, `smb2_check_user_session`, `smb3_decrypt_req`, `__handle_ksmbd_work`) is driven directly by attacker-supplied SMB2 PDUs from a remote peer.\nAC:L - The attacker controls both sides of the race \u2014 it pipelines up to 8192 concurrent requests per connection (each handled by a separate ksmbd-io kworker), drives sessions into EXPIRED/IN_PROGRESS state so `ksmbd_expire_session()` frees them with no timeout, and the `__handle_ksmbd_work` window spans an entire AES-GCM response encryption. A lost race yields only a benign SMB error, so it can be retried indefinitely.\nPR:N - Two of the three unreferenced lookups live inside `smb2_sess_setup()` \u2014 the authentication handshake itself \u2014 and operate on attacker-supplied, sequentially-allocated (trivially enumerable) session IDs before any credential is verified, including `ksmbd_session_lookup_slowpath()` against the global session table. Additionally, `ntlm_authenticate()` skips password verification entirely for guest/anonymous users, so under the common \"map to guest\" configuration an unauthenticated peer obtains a VALID session and reaches all remaining paths.\nUI:N - Exploitation requires only that the attacker send SMB2 requests to the listening ksmbd service; no action by any local user or administrator is involved.\nS:U - The use-after-free corrupts kernel heap memory within the kernel\u0027s own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The freed `struct ksmbd_session` is read after free, including `smb3encryptionkey`/`smb3decryptionkey`/`smb3signingkey` \u2014 `encrypt_resp()` encrypts responses using whatever now occupies that slab, leaking freed kernel memory to the wire; controlling the reallocated `sess-\u003euser` and `file_table` pointers escalates this to arbitrary kernel read.\nI:H - The bug yields multiple write primitives on freed memory \u2014 `atomic_inc/dec` on `sess-\u003erefcnt`, `sess-\u003estate = SMB2_SESSION_EXPIRED`, `sess-\u003euser = NULL`, and `kfree(sess-\u003ePreauth_HashValue)` plus xarray-walking frees in `ksmbd_session_destroy()` \u2014 giving arbitrary-free and controlled-pointer corruption suitable for control-flow hijack, and `sess-\u003euser` directly governs SMB access-control decisions.\nA:H - Any lost race dereferences freed slab memory, reliably producing a kernel oops or panic in the ksmbd worker, and the attacker can trigger it repeatedly from the network to take down the file server."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:47:38.424Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2107ab40629aeabbec369cf34b8cf0f288c3eb1b"
        },
        {
          "url": "https://git.kernel.org/stable/c/37a0e2b362b3150317fb6e2139de67b1e29ae5ff"
        },
        {
          "url": "https://git.kernel.org/stable/c/450a844c045ff0895d41b05a1cbe8febd1acfcfd"
        },
        {
          "url": "https://git.kernel.org/stable/c/a39e31e22a535d47b14656a7d6a893c7f6cf758c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b95629435b84b9ecc0c765995204a4d8a913ed52"
        },
        {
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-25-100/"
        }
      ],
      "title": "ksmbd: fix racy issue from session lookup and expire",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-58087",
    "datePublished": "2025-03-12T07:28:09.114Z",
    "dateReserved": "2025-03-06T15:52:09.185Z",
    "dateUpdated": "2026-08-05T11:47:38.424Z",
    "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.

Detection rules are retrieved from Rulezet.

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.