github - ghsa-45gw-fx24-h4pv

GHSA-45GW-FX24-H4PV

Vulnerability from github – Published: 2025-05-01 15:31 – Updated: 2025-11-03 21:33

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-37778"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-01T14:15:41Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Fix dangling pointer in krb_authenticate\n\nkrb_authenticate frees sess-\u003euser and does not set the pointer\nto NULL. It calls ksmbd_krb5_authenticate to reinitialise\nsess-\u003euser but that function may return without doing so. If\nthat happens then smb2_sess_setup, which calls krb_authenticate,\nwill be accessing free\u0027d memory when it later uses sess-\u003euser.",
  "id": "GHSA-45gw-fx24-h4pv",
  "modified": "2025-11-03T21:33:45Z",
  "published": "2025-05-01T15:31:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-37778"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2025-05-01 13:07 – Updated: 2025-11-03 19:54

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 ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/d5b554bc8d554ed6d…
	https://git.kernel.org/stable/c/1db2451de23e98bc8…
	https://git.kernel.org/stable/c/6e30c0e10210c714f…
	https://git.kernel.org/stable/c/e83e39a5f6a01a814…
	https://git.kernel.org/stable/c/1e440d5b25b7efccb…

Impacted products

Vendor

Product

Version

Linux

Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < d5b554bc8d554ed6ddf443d3db2fad9f665cec10 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 1db2451de23e98bc864c6a6e52aa0d82c91cb325 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 6e30c0e10210c714f3d4453dc258d4abcc70364e (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < e83e39a5f6a01a81411a4558a59a10f87aa88dd6 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 1e440d5b25b7efccb3defe542a73c51005799a5f (git)

Linux

Affected: 5.15
Unaffected: 0 , < 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)

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-45GW-FX24-H4PV

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

Tags

Sightings

Nomenclature