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CVE-2025-37778 (GCVE-0-2025-37778)

Vulnerability from cvelistv5 – Published: 2025-05-01 13:07 – Updated: 2026-08-05 11:57
VLAI
Title
ksmbd: Fix dangling pointer in krb_authenticate
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix dangling pointer in krb_authenticate krb_authenticate frees sess->user and does not set the pointer to NULL. It calls ksmbd_krb5_authenticate to reinitialise sess->user but that function may return without doing so. If that happens then smb2_sess_setup, which calls krb_authenticate, will be accessing free'd memory when it later uses sess->user.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < b61f04d5d73c53d183019bafe22fb700a739bac5 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < d5b554bc8d554ed6ddf443d3db2fad9f665cec10 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 1db2451de23e98bc864c6a6e52aa0d82c91cb325 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 6e30c0e10210c714f3d4453dc258d4abcc70364e (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < e83e39a5f6a01a81411a4558a59a10f87aa88dd6 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 1e440d5b25b7efccb3defe542a73c51005799a5f (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.135 , ≤ 6.1.* (semver)
Unaffected: 6.6.88 , ≤ 6.6.* (semver)
Unaffected: 6.12.25 , ≤ 6.12.* (semver)
Unaffected: 6.14.4 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:21:34+00:00",
      "cve": "CVE-2025-37778",
      "id": "CVE-2025-37778",
      "initial_release_date": "2025-05-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ksmbd: Fix dangling pointer in krb_authenticate",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-37778.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-30T01:59:34Z",
      "cve": "CVE-2025-37778",
      "id": "CVE-2025-37778",
      "initial_release_date": "2025-05-02T02:02:31Z",
      "product_status:known_not_affected": "566",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-37778",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-37778.json",
      "version": "16"
    }
  }
}



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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.


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.