CVE-2025-37778 (GCVE-0-2025-37778)
Vulnerability from cvelistv5
Published
2025-05-01 13:07
Modified
2025-05-26 05:20
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/smb2pdu.c"
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.135",
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              "status": "unaffected",
              "version": "6.6.88",
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            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.25",
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              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.4",
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            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                {
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              ],
              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:20:41.337Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10"
        },
        {
          "url": "https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325"
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        {
          "url": "https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e"
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          "url": "https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6"
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        {
          "url": "https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f"
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      ],
      "title": "ksmbd: Fix dangling pointer in krb_authenticate",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37778",
    "datePublished": "2025-05-01T13:07:16.472Z",
    "dateReserved": "2025-04-16T04:51:23.940Z",
    "dateUpdated": "2025-05-26T05:20:41.337Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37778\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T14:15:41.617\",\"lastModified\":\"2025-05-02T13:53:20.943\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: Se corrige el puntero colgante en krb_authenticate. krb_authenticate libera sess-\u0026gt;user y no establece el puntero en NULL. Llama a ksmbd_krb5_authenticate para reinicializar sess-\u0026gt;user, pero es posible que esta funci\u00f3n no lo retorne. Si esto ocurre, smb2_sess_setup, que llama a krb_authenticate, acceder\u00e1 a la memoria liberada cuando utilice posteriormente sess-\u0026gt;user.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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