CVE-2025-71150 (GCVE-0-2025-71150)

Vulnerability from cvelistv5 – Published: 2026-01-23 14:15 – Updated: 2026-08-05 12:12
VLAI
Title
ksmbd: Fix refcount leak when invalid session is found on session lookup
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix refcount leak when invalid session is found on session lookup When a session is found but its state is not SMB2_SESSION_VALID, It indicates that no valid session was found, but it is missing to decrement the reference count acquired by the session lookup, which results in a reference count leak. This patch fixes the issue by explicitly calling ksmbd_user_session_put to release the reference to the session.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2107ab40629aeabbec369cf34b8cf0f288c3eb1b , < 11fe566b442e3bc2774191740fd377739a87a1c0 (git)
Affected: 37a0e2b362b3150317fb6e2139de67b1e29ae5ff , < 0fb87b28cafae71e9c8248432cc3a6a1fd759efc (git)
Affected: 450a844c045ff0895d41b05a1cbe8febd1acfcfd , < e54fb2a4772545701766cba08aab20de5eace8cd (git)
Affected: a39e31e22a535d47b14656a7d6a893c7f6cf758c , < 02e06785e85b4bd86ef3d23b7c8d87acc76773d5 (git)
Affected: b95629435b84b9ecc0c765995204a4d8a913ed52 , < 8cabcb4dd3dc85dd83a37d26efcc59a66a4074d7 (git)
Affected: b95629435b84b9ecc0c765995204a4d8a913ed52 , < cafb57f7bdd57abba87725eb4e82bbdca4959644 (git)
Affected: 5.15.176 , < 5.15.203 (semver)
Affected: 6.1.121 , < 6.1.160 (semver)
Affected: 6.6.67 , < 6.6.120 (semver)
Affected: 6.12.6 , < 6.12.64 (semver)
Create a notification for this product.
Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "redhat_vex": {
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      "cve": "CVE-2025-71150",
      "id": "CVE-2025-71150",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_affected": "76",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel ksmbd: Denial of Service via reference count leak",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71150.json",
      "version": "3"
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-71150",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-71150.json",
      "version": "8"
    }
  }
}



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Tags
Taxonomy of the tags.





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.