CVE-2022-50372 (GCVE-0-2022-50372)
Vulnerability from cvelistv5
Published
2025-09-17 14:56
Modified
2026-05-11 19:18
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: cifs: Fix memory leak when build ntlmssp negotiate blob failed There is a memory leak when mount cifs: unreferenced object 0xffff888166059600 (size 448): comm "mount.cifs", pid 51391, jiffies 4295596373 (age 330.596s) hex dump (first 32 bytes): fe 53 4d 42 40 00 00 00 00 00 00 00 01 00 82 00 .SMB@........... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000060609a61>] mempool_alloc+0xe1/0x260 [<00000000adfa6c63>] cifs_small_buf_get+0x24/0x60 [<00000000ebb404c7>] __smb2_plain_req_init+0x32/0x460 [<00000000bcf875b4>] SMB2_sess_alloc_buffer+0xa4/0x3f0 [<00000000753a2987>] SMB2_sess_auth_rawntlmssp_negotiate+0xf5/0x480 [<00000000f0c1f4f9>] SMB2_sess_setup+0x253/0x410 [<00000000a8b83303>] cifs_setup_session+0x18f/0x4c0 [<00000000854bd16d>] cifs_get_smb_ses+0xae7/0x13c0 [<000000006cbc43d9>] mount_get_conns+0x7a/0x730 [<000000005922d816>] cifs_mount+0x103/0xd10 [<00000000e33def3b>] cifs_smb3_do_mount+0x1dd/0xc90 [<0000000078034979>] smb3_get_tree+0x1d5/0x300 [<000000004371f980>] vfs_get_tree+0x41/0xf0 [<00000000b670d8a7>] path_mount+0x9b3/0xdd0 [<000000005e839a7d>] __x64_sys_mount+0x190/0x1d0 [<000000009404c3b9>] do_syscall_64+0x35/0x80 When build ntlmssp negotiate blob failed, the session setup request should be freed.
References
Impacted products
Vendor Product Version
Linux Linux Version: 49bd49f983b5026e4557d31c5d737d9657c4113e
Version: 49bd49f983b5026e4557d31c5d737d9657c4113e
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              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
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              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
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                "id": "CVE-2022-50372",
                "options": [
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                    "Exploitation": "none"
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                "timestamp": "2026-01-14T18:36:31.603396Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/cifs/smb2pdu.c"
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            {
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              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: Fix memory leak when build ntlmssp negotiate blob failed\n\nThere is a memory leak when mount cifs:\n  unreferenced object 0xffff888166059600 (size 448):\n    comm \"mount.cifs\", pid 51391, jiffies 4295596373 (age 330.596s)\n    hex dump (first 32 bytes):\n      fe 53 4d 42 40 00 00 00 00 00 00 00 01 00 82 00  .SMB@...........\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [\u003c0000000060609a61\u003e] mempool_alloc+0xe1/0x260\n      [\u003c00000000adfa6c63\u003e] cifs_small_buf_get+0x24/0x60\n      [\u003c00000000ebb404c7\u003e] __smb2_plain_req_init+0x32/0x460\n      [\u003c00000000bcf875b4\u003e] SMB2_sess_alloc_buffer+0xa4/0x3f0\n      [\u003c00000000753a2987\u003e] SMB2_sess_auth_rawntlmssp_negotiate+0xf5/0x480\n      [\u003c00000000f0c1f4f9\u003e] SMB2_sess_setup+0x253/0x410\n      [\u003c00000000a8b83303\u003e] cifs_setup_session+0x18f/0x4c0\n      [\u003c00000000854bd16d\u003e] cifs_get_smb_ses+0xae7/0x13c0\n      [\u003c000000006cbc43d9\u003e] mount_get_conns+0x7a/0x730\n      [\u003c000000005922d816\u003e] cifs_mount+0x103/0xd10\n      [\u003c00000000e33def3b\u003e] cifs_smb3_do_mount+0x1dd/0xc90\n      [\u003c0000000078034979\u003e] smb3_get_tree+0x1d5/0x300\n      [\u003c000000004371f980\u003e] vfs_get_tree+0x41/0xf0\n      [\u003c00000000b670d8a7\u003e] path_mount+0x9b3/0xdd0\n      [\u003c000000005e839a7d\u003e] __x64_sys_mount+0x190/0x1d0\n      [\u003c000000009404c3b9\u003e] do_syscall_64+0x35/0x80\n\nWhen build ntlmssp negotiate blob failed, the session setup request\nshould be freed."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:18:16.908Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fa5a70bdd5e565c8696fb04dfe18a4e8aff4695d"
        },
        {
          "url": "https://git.kernel.org/stable/c/30b2d7f8f13664655480d6af45f60270b3eb6736"
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      "title": "cifs: Fix memory leak when build ntlmssp negotiate blob failed",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50372",
    "datePublished": "2025-09-17T14:56:27.577Z",
    "dateReserved": "2025-09-17T14:53:06.995Z",
    "dateUpdated": "2026-05-11T19:18:16.908Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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