cnvd - cnvd-2025-03425

cnvd-2025-03425

Vulnerability from cnvd

Title: Linux kernel cifs_put_tcp_session函数资源管理错误漏洞

Description:

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。

Linux kernel存在资源管理错误漏洞，该漏洞源于cifs_put_tcp_session函数在关闭服务器时，cifsd线程可能仍在尝试重新连接DFS目标，攻击者可利用该漏洞导致server->hostname被重复释放，引发空指针引用。

Severity: 中

Patch Name: Linux kernel cifs_put_tcp_session函数资源管理错误漏洞的补丁

Patch Description:

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。

Linux kernel存在资源管理错误漏洞，该漏洞源于cifs_put_tcp_session函数在关闭服务器时，cifsd线程可能仍在尝试重新连接DFS目标，攻击者可利用该漏洞导致server->hostname被重复释放，引发空指针引用。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description:

厂商已发布了漏洞修复程序，请及时关注更新： https://git.kernel.org/stable/c/1ea68070338518a1d31ce71e6abfe1b30001b27a

Reference: https://nvd.nist.gov/vuln/detail/CVE-2025-21673

Impacted products

Name
Linux Kernel

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2025-21673",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2025-21673"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8ecifs_put_tcp_session\u51fd\u6570\u5728\u5173\u95ed\u670d\u52a1\u5668\u65f6\uff0ccifsd\u7ebf\u7a0b\u53ef\u80fd\u4ecd\u5728\u5c1d\u8bd5\u91cd\u65b0\u8fde\u63a5DFS\u76ee\u6807\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4server-\u003ehostname\u88ab\u91cd\u590d\u91ca\u653e\uff0c\u5f15\u53d1\u7a7a\u6307\u9488\u5f15\u7528\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://git.kernel.org/stable/c/1ea68070338518a1d31ce71e6abfe1b30001b27a",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2025-03425",
  "openTime": "2025-02-21",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8ecifs_put_tcp_session\u51fd\u6570\u5728\u5173\u95ed\u670d\u52a1\u5668\u65f6\uff0ccifsd\u7ebf\u7a0b\u53ef\u80fd\u4ecd\u5728\u5c1d\u8bd5\u91cd\u65b0\u8fde\u63a5DFS\u76ee\u6807\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4server-\u003ehostname\u88ab\u91cd\u590d\u91ca\u653e\uff0c\u5f15\u53d1\u7a7a\u6307\u9488\u5f15\u7528\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Linux kernel cifs_put_tcp_session\u51fd\u6570\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Kernel"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2025-21673",
  "serverity": "\u4e2d",
  "submitTime": "2025-02-17",
  "title": "Linux kernel cifs_put_tcp_session\u51fd\u6570\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2025-21673 (GCVE-0-2025-21673)

Vulnerability from cvelistv5

Published

2025-01-31 11:25

Modified

2025-05-04 13:06

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double free of TCP_Server_Info::hostname When shutting down the server in cifs_put_tcp_session(), cifsd thread might be reconnecting to multiple DFS targets before it realizes it should exit the loop, so @server->hostname can't be freed as long as cifsd thread isn't done. Otherwise the following can happen: RIP: 0010:__slab_free+0x223/0x3c0 Code: 5e 41 5f c3 cc cc cc cc 4c 89 de 4c 89 cf 44 89 44 24 08 4c 89 1c 24 e8 fb cf 8e 00 44 8b 44 24 08 4c 8b 1c 24 e9 5f fe ff ff <0f> 0b 41 f7 45 08 00 0d 21 00 0f 85 2d ff ff ff e9 1f ff ff ff 80 RSP: 0018:ffffb26180dbfd08 EFLAGS: 00010246 RAX: ffff8ea34728e510 RBX: ffff8ea34728e500 RCX: 0000000000800068 RDX: 0000000000800068 RSI: 0000000000000000 RDI: ffff8ea340042400 RBP: ffffe112041ca380 R08: 0000000000000001 R09: 0000000000000000 R10: 6170732e31303000 R11: 70726f632e786563 R12: ffff8ea34728e500 R13: ffff8ea340042400 R14: ffff8ea34728e500 R15: 0000000000800068 FS: 0000000000000000(0000) GS:ffff8ea66fd80000(0000) 000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc25376080 CR3: 000000012a2ba001 CR4: PKRU: 55555554 Call Trace: <TASK> ? show_trace_log_lvl+0x1c4/0x2df ? show_trace_log_lvl+0x1c4/0x2df ? __reconnect_target_unlocked+0x3e/0x160 [cifs] ? __die_body.cold+0x8/0xd ? die+0x2b/0x50 ? do_trap+0xce/0x120 ? __slab_free+0x223/0x3c0 ? do_error_trap+0x65/0x80 ? __slab_free+0x223/0x3c0 ? exc_invalid_op+0x4e/0x70 ? __slab_free+0x223/0x3c0 ? asm_exc_invalid_op+0x16/0x20 ? __slab_free+0x223/0x3c0 ? extract_hostname+0x5c/0xa0 [cifs] ? extract_hostname+0x5c/0xa0 [cifs] ? __kmalloc+0x4b/0x140 __reconnect_target_unlocked+0x3e/0x160 [cifs] reconnect_dfs_server+0x145/0x430 [cifs] cifs_handle_standard+0x1ad/0x1d0 [cifs] cifs_demultiplex_thread+0x592/0x730 [cifs] ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs] kthread+0xdd/0x100 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x29/0x50 </TASK>

References

▼	URL	Tags
	https://git.kernel.org/stable/c/1ea68070338518a1d31ce71e6abfe1b30001b27a
	https://git.kernel.org/stable/c/a2be5f2ba34d0c6d5ef2624b24e3d852561fcd6a
	https://git.kernel.org/stable/c/fa2f9906a7b333ba757a7dbae0713d8a5396186e

Impacted products

Vendor

Product

Version

▼

Linux

Version: 7be3248f313930ff3d3436d4e9ddbe9fccc1f541
Version: 7be3248f313930ff3d3436d4e9ddbe9fccc1f541
Version: 7be3248f313930ff3d3436d4e9ddbe9fccc1f541
Version: 49f933bb3016269dc50074eac5f6033d127644f1
Version: 1c35a216ef77db708178ca225d796271f2f60a7a

Linux

Version: 5.16

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/connect.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1ea68070338518a1d31ce71e6abfe1b30001b27a",
              "status": "affected",
              "version": "7be3248f313930ff3d3436d4e9ddbe9fccc1f541",
              "versionType": "git"
            },
            {
              "lessThan": "a2be5f2ba34d0c6d5ef2624b24e3d852561fcd6a",
              "status": "affected",
              "version": "7be3248f313930ff3d3436d4e9ddbe9fccc1f541",
              "versionType": "git"
            },
            {
              "lessThan": "fa2f9906a7b333ba757a7dbae0713d8a5396186e",
              "status": "affected",
              "version": "7be3248f313930ff3d3436d4e9ddbe9fccc1f541",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "49f933bb3016269dc50074eac5f6033d127644f1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1c35a216ef77db708178ca225d796271f2f60a7a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/connect.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.74",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.74",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.11",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.14.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.15.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix double free of TCP_Server_Info::hostname\n\nWhen shutting down the server in cifs_put_tcp_session(), cifsd thread\nmight be reconnecting to multiple DFS targets before it realizes it\nshould exit the loop, so @server-\u003ehostname can\u0027t be freed as long as\ncifsd thread isn\u0027t done.  Otherwise the following can happen:\n\n  RIP: 0010:__slab_free+0x223/0x3c0\n  Code: 5e 41 5f c3 cc cc cc cc 4c 89 de 4c 89 cf 44 89 44 24 08 4c 89\n  1c 24 e8 fb cf 8e 00 44 8b 44 24 08 4c 8b 1c 24 e9 5f fe ff ff \u003c0f\u003e\n  0b 41 f7 45 08 00 0d 21 00 0f 85 2d ff ff ff e9 1f ff ff ff 80\n  RSP: 0018:ffffb26180dbfd08 EFLAGS: 00010246\n  RAX: ffff8ea34728e510 RBX: ffff8ea34728e500 RCX: 0000000000800068\n  RDX: 0000000000800068 RSI: 0000000000000000 RDI: ffff8ea340042400\n  RBP: ffffe112041ca380 R08: 0000000000000001 R09: 0000000000000000\n  R10: 6170732e31303000 R11: 70726f632e786563 R12: ffff8ea34728e500\n  R13: ffff8ea340042400 R14: ffff8ea34728e500 R15: 0000000000800068\n  FS: 0000000000000000(0000) GS:ffff8ea66fd80000(0000)\n  000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 00007ffc25376080 CR3: 000000012a2ba001 CR4:\n  PKRU: 55555554\n  Call Trace:\n   \u003cTASK\u003e\n   ? show_trace_log_lvl+0x1c4/0x2df\n   ? show_trace_log_lvl+0x1c4/0x2df\n   ? __reconnect_target_unlocked+0x3e/0x160 [cifs]\n   ? __die_body.cold+0x8/0xd\n   ? die+0x2b/0x50\n   ? do_trap+0xce/0x120\n   ? __slab_free+0x223/0x3c0\n   ? do_error_trap+0x65/0x80\n   ? __slab_free+0x223/0x3c0\n   ? exc_invalid_op+0x4e/0x70\n   ? __slab_free+0x223/0x3c0\n   ? asm_exc_invalid_op+0x16/0x20\n   ? __slab_free+0x223/0x3c0\n   ? extract_hostname+0x5c/0xa0 [cifs]\n   ? extract_hostname+0x5c/0xa0 [cifs]\n   ? __kmalloc+0x4b/0x140\n   __reconnect_target_unlocked+0x3e/0x160 [cifs]\n   reconnect_dfs_server+0x145/0x430 [cifs]\n   cifs_handle_standard+0x1ad/0x1d0 [cifs]\n   cifs_demultiplex_thread+0x592/0x730 [cifs]\n   ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs]\n   kthread+0xdd/0x100\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork+0x29/0x50\n   \u003c/TASK\u003e"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T13:06:14.933Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1ea68070338518a1d31ce71e6abfe1b30001b27a"
        },
        {
          "url": "https://git.kernel.org/stable/c/a2be5f2ba34d0c6d5ef2624b24e3d852561fcd6a"
        },
        {
          "url": "https://git.kernel.org/stable/c/fa2f9906a7b333ba757a7dbae0713d8a5396186e"
        }
      ],
      "title": "smb: client: fix double free of TCP_Server_Info::hostname",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21673",
    "datePublished": "2025-01-31T11:25:35.922Z",
    "dateReserved": "2024-12-29T08:45:45.736Z",
    "dateUpdated": "2025-05-04T13:06:14.933Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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