CVE-2025-22025 (GCVE-0-2025-22025)

Vulnerability from cvelistv5 – Published: 2025-04-16 14:11 – Updated: 2026-01-02 15:28
VLAI?
Title
nfsd: put dl_stid if fail to queue dl_recall
Summary
In the Linux kernel, the following vulnerability has been resolved: nfsd: put dl_stid if fail to queue dl_recall Before calling nfsd4_run_cb to queue dl_recall to the callback_wq, we increment the reference count of dl_stid. We expect that after the corresponding work_struct is processed, the reference count of dl_stid will be decremented through the callback function nfsd4_cb_recall_release. However, if the call to nfsd4_run_cb fails, the incremented reference count of dl_stid will not be decremented correspondingly, leading to the following nfs4_stid leak: unreferenced object 0xffff88812067b578 (size 344): comm "nfsd", pid 2761, jiffies 4295044002 (age 5541.241s) hex dump (first 32 bytes): 01 00 00 00 6b 6b 6b 6b b8 02 c0 e2 81 88 ff ff ....kkkk........ 00 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 ad 4e ad de .kkkkkkk.....N.. backtrace: kmem_cache_alloc+0x4b9/0x700 nfsd4_process_open1+0x34/0x300 nfsd4_open+0x2d1/0x9d0 nfsd4_proc_compound+0x7a2/0xe30 nfsd_dispatch+0x241/0x3e0 svc_process_common+0x5d3/0xcc0 svc_process+0x2a3/0x320 nfsd+0x180/0x2e0 kthread+0x199/0x1d0 ret_from_fork+0x30/0x50 ret_from_fork_asm+0x1b/0x30 unreferenced object 0xffff8881499f4d28 (size 368): comm "nfsd", pid 2761, jiffies 4295044005 (age 5541.239s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 30 4d 9f 49 81 88 ff ff ........0M.I.... 30 4d 9f 49 81 88 ff ff 20 00 00 00 01 00 00 00 0M.I.... ....... backtrace: kmem_cache_alloc+0x4b9/0x700 nfs4_alloc_stid+0x29/0x210 alloc_init_deleg+0x92/0x2e0 nfs4_set_delegation+0x284/0xc00 nfs4_open_delegation+0x216/0x3f0 nfsd4_process_open2+0x2b3/0xee0 nfsd4_open+0x770/0x9d0 nfsd4_proc_compound+0x7a2/0xe30 nfsd_dispatch+0x241/0x3e0 svc_process_common+0x5d3/0xcc0 svc_process+0x2a3/0x320 nfsd+0x180/0x2e0 kthread+0x199/0x1d0 ret_from_fork+0x30/0x50 ret_from_fork_asm+0x1b/0x30 Fix it by checking the result of nfsd4_run_cb and call nfs4_put_stid if fail to queue dl_recall.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf , < b874cdef4e67e5150e07eff0eae1cbb21fb92da1 (git)
Affected: b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf , < cdb796137c57e68ca34518d53be53b679351eb86 (git)
Affected: b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf , < d96587cc93ec369031bcd7658c6adc719873c9fd (git)
Affected: b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf , < 9a81cde8c7ce65dd90fb47ceea93a45fc1a2fbd1 (git)
Affected: b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf , < cad3479b63661a399c9df1d0b759e1806e2df3c8 (git)
Affected: b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf , < 63b91c8ff4589f5263873b24c052447a28e10ef7 (git)
Affected: b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf , < 133f5e2a37ce08c82d24e8fba65e0a81deae4609 (git)
Affected: b5a1a81e5c25fb6bb3fdc1812ba69ff6ab638fcf , < 230ca758453c63bd38e4d9f4a21db698f7abada8 (git)
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    Linux Linux Affected: 2.6.35
Unaffected: 0 , < 2.6.35 (semver)
Unaffected: 5.10.236 , ≤ 5.10.* (semver)
Unaffected: 5.15.180 , ≤ 5.15.* (semver)
Unaffected: 6.1.134 , ≤ 6.1.* (semver)
Unaffected: 6.6.87 , ≤ 6.6.* (semver)
Unaffected: 6.12.23 , ≤ 6.12.* (semver)
Unaffected: 6.13.11 , ≤ 6.13.* (semver)
Unaffected: 6.14.2 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
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          "dateUpdated": "2025-11-03T19:41:12.024Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
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        "title": "CVE Program Container"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: put dl_stid if fail to queue dl_recall\n\nBefore calling nfsd4_run_cb to queue dl_recall to the callback_wq, we\nincrement the reference count of dl_stid.\nWe expect that after the corresponding work_struct is processed, the\nreference count of dl_stid will be decremented through the callback\nfunction nfsd4_cb_recall_release.\nHowever, if the call to nfsd4_run_cb fails, the incremented reference\ncount of dl_stid will not be decremented correspondingly, leading to the\nfollowing nfs4_stid leak:\nunreferenced object 0xffff88812067b578 (size 344):\n  comm \"nfsd\", pid 2761, jiffies 4295044002 (age 5541.241s)\n  hex dump (first 32 bytes):\n    01 00 00 00 6b 6b 6b 6b b8 02 c0 e2 81 88 ff ff  ....kkkk........\n    00 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 ad 4e ad de  .kkkkkkk.....N..\n  backtrace:\n    kmem_cache_alloc+0x4b9/0x700\n    nfsd4_process_open1+0x34/0x300\n    nfsd4_open+0x2d1/0x9d0\n    nfsd4_proc_compound+0x7a2/0xe30\n    nfsd_dispatch+0x241/0x3e0\n    svc_process_common+0x5d3/0xcc0\n    svc_process+0x2a3/0x320\n    nfsd+0x180/0x2e0\n    kthread+0x199/0x1d0\n    ret_from_fork+0x30/0x50\n    ret_from_fork_asm+0x1b/0x30\nunreferenced object 0xffff8881499f4d28 (size 368):\n  comm \"nfsd\", pid 2761, jiffies 4295044005 (age 5541.239s)\n  hex dump (first 32 bytes):\n    01 00 00 00 00 00 00 00 30 4d 9f 49 81 88 ff ff  ........0M.I....\n    30 4d 9f 49 81 88 ff ff 20 00 00 00 01 00 00 00  0M.I.... .......\n  backtrace:\n    kmem_cache_alloc+0x4b9/0x700\n    nfs4_alloc_stid+0x29/0x210\n    alloc_init_deleg+0x92/0x2e0\n    nfs4_set_delegation+0x284/0xc00\n    nfs4_open_delegation+0x216/0x3f0\n    nfsd4_process_open2+0x2b3/0xee0\n    nfsd4_open+0x770/0x9d0\n    nfsd4_proc_compound+0x7a2/0xe30\n    nfsd_dispatch+0x241/0x3e0\n    svc_process_common+0x5d3/0xcc0\n    svc_process+0x2a3/0x320\n    nfsd+0x180/0x2e0\n    kthread+0x199/0x1d0\n    ret_from_fork+0x30/0x50\n    ret_from_fork_asm+0x1b/0x30\nFix it by checking the result of nfsd4_run_cb and call nfs4_put_stid if\nfail to queue dl_recall."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-02T15:28:48.432Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b874cdef4e67e5150e07eff0eae1cbb21fb92da1"
        },
        {
          "url": "https://git.kernel.org/stable/c/cdb796137c57e68ca34518d53be53b679351eb86"
        },
        {
          "url": "https://git.kernel.org/stable/c/d96587cc93ec369031bcd7658c6adc719873c9fd"
        },
        {
          "url": "https://git.kernel.org/stable/c/9a81cde8c7ce65dd90fb47ceea93a45fc1a2fbd1"
        },
        {
          "url": "https://git.kernel.org/stable/c/cad3479b63661a399c9df1d0b759e1806e2df3c8"
        },
        {
          "url": "https://git.kernel.org/stable/c/63b91c8ff4589f5263873b24c052447a28e10ef7"
        },
        {
          "url": "https://git.kernel.org/stable/c/133f5e2a37ce08c82d24e8fba65e0a81deae4609"
        },
        {
          "url": "https://git.kernel.org/stable/c/230ca758453c63bd38e4d9f4a21db698f7abada8"
        }
      ],
      "title": "nfsd: put dl_stid if fail to queue dl_recall",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-22025",
    "datePublished": "2025-04-16T14:11:46.624Z",
    "dateReserved": "2024-12-29T08:45:45.807Z",
    "dateUpdated": "2026-01-02T15:28:48.432Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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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.



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