CVE-2025-38023 (GCVE-0-2025-38023)
Vulnerability from cvelistv5
Published
2025-06-18 09:28
Modified
2025-06-18 09:28
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nfs: handle failure of nfs_get_lock_context in unlock path When memory is insufficient, the allocation of nfs_lock_context in nfs_get_lock_context() fails and returns -ENOMEM. If we mistakenly treat an nfs4_unlockdata structure (whose l_ctx member has been set to -ENOMEM) as valid and proceed to execute rpc_run_task(), this will trigger a NULL pointer dereference in nfs4_locku_prepare. For example: BUG: kernel NULL pointer dereference, address: 000000000000000c PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP PTI CPU: 15 UID: 0 PID: 12 Comm: kworker/u64:0 Not tainted 6.15.0-rc2-dirty #60 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 Workqueue: rpciod rpc_async_schedule RIP: 0010:nfs4_locku_prepare+0x35/0xc2 Code: 89 f2 48 89 fd 48 c7 c7 68 69 ef b5 53 48 8b 8e 90 00 00 00 48 89 f3 RSP: 0018:ffffbbafc006bdb8 EFLAGS: 00010246 RAX: 000000000000004b RBX: ffff9b964fc1fa00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: fffffffffffffff4 RDI: ffff9ba53fddbf40 RBP: ffff9ba539934000 R08: 0000000000000000 R09: ffffbbafc006bc38 R10: ffffffffb6b689c8 R11: 0000000000000003 R12: ffff9ba539934030 R13: 0000000000000001 R14: 0000000004248060 R15: ffffffffb56d1c30 FS: 0000000000000000(0000) GS:ffff9ba5881f0000(0000) knlGS:00000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000000c CR3: 000000093f244000 CR4: 00000000000006f0 Call Trace: <TASK> __rpc_execute+0xbc/0x480 rpc_async_schedule+0x2f/0x40 process_one_work+0x232/0x5d0 worker_thread+0x1da/0x3d0 ? __pfx_worker_thread+0x10/0x10 kthread+0x10d/0x240 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x34/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> Modules linked in: CR2: 000000000000000c ---[ end trace 0000000000000000 ]--- Free the allocated nfs4_unlockdata when nfs_get_lock_context() fails and return NULL to terminate subsequent rpc_run_task, preventing NULL pointer dereference.
References
Impacted products
Vendor Product Version
Linux Linux Version: f30cb757f680f965ba8a2e53cb3588052a01aeb5
Version: f30cb757f680f965ba8a2e53cb3588052a01aeb5
Version: f30cb757f680f965ba8a2e53cb3588052a01aeb5
Version: f30cb757f680f965ba8a2e53cb3588052a01aeb5
Version: f30cb757f680f965ba8a2e53cb3588052a01aeb5
Version: f30cb757f680f965ba8a2e53cb3588052a01aeb5
Version: f30cb757f680f965ba8a2e53cb3588052a01aeb5
Version: f30cb757f680f965ba8a2e53cb3588052a01aeb5
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/nfs4proc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "f30cb757f680f965ba8a2e53cb3588052a01aeb5",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "f30cb757f680f965ba8a2e53cb3588052a01aeb5",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "f30cb757f680f965ba8a2e53cb3588052a01aeb5",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "a6879a076b98c99c9fe747816fe1c29543442441",
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              "version": "f30cb757f680f965ba8a2e53cb3588052a01aeb5",
              "versionType": "git"
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              "status": "affected",
              "version": "f30cb757f680f965ba8a2e53cb3588052a01aeb5",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "f30cb757f680f965ba8a2e53cb3588052a01aeb5",
              "versionType": "git"
            },
            {
              "lessThan": "c457dc1ec770a22636b473ce5d35614adfe97636",
              "status": "affected",
              "version": "f30cb757f680f965ba8a2e53cb3588052a01aeb5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/nfs4proc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.12"
            },
            {
              "lessThan": "4.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.294",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.238",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.184",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.92",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.294",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.238",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.184",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.140",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.92",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.30",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14.8",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfs: handle failure of nfs_get_lock_context in unlock path\n\nWhen memory is insufficient, the allocation of nfs_lock_context in\nnfs_get_lock_context() fails and returns -ENOMEM. If we mistakenly treat\nan nfs4_unlockdata structure (whose l_ctx member has been set to -ENOMEM)\nas valid and proceed to execute rpc_run_task(), this will trigger a NULL\npointer dereference in nfs4_locku_prepare. For example:\n\nBUG: kernel NULL pointer dereference, address: 000000000000000c\nPGD 0 P4D 0\nOops: Oops: 0000 [#1] SMP PTI\nCPU: 15 UID: 0 PID: 12 Comm: kworker/u64:0 Not tainted 6.15.0-rc2-dirty #60\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40\nWorkqueue: rpciod rpc_async_schedule\nRIP: 0010:nfs4_locku_prepare+0x35/0xc2\nCode: 89 f2 48 89 fd 48 c7 c7 68 69 ef b5 53 48 8b 8e 90 00 00 00 48 89 f3\nRSP: 0018:ffffbbafc006bdb8 EFLAGS: 00010246\nRAX: 000000000000004b RBX: ffff9b964fc1fa00 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: fffffffffffffff4 RDI: ffff9ba53fddbf40\nRBP: ffff9ba539934000 R08: 0000000000000000 R09: ffffbbafc006bc38\nR10: ffffffffb6b689c8 R11: 0000000000000003 R12: ffff9ba539934030\nR13: 0000000000000001 R14: 0000000004248060 R15: ffffffffb56d1c30\nFS: 0000000000000000(0000) GS:ffff9ba5881f0000(0000) knlGS:00000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000000000000c CR3: 000000093f244000 CR4: 00000000000006f0\nCall Trace:\n \u003cTASK\u003e\n __rpc_execute+0xbc/0x480\n rpc_async_schedule+0x2f/0x40\n process_one_work+0x232/0x5d0\n worker_thread+0x1da/0x3d0\n ? __pfx_worker_thread+0x10/0x10\n kthread+0x10d/0x240\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x34/0x50\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1a/0x30\n \u003c/TASK\u003e\nModules linked in:\nCR2: 000000000000000c\n---[ end trace 0000000000000000 ]---\n\nFree the allocated nfs4_unlockdata when nfs_get_lock_context() fails and\nreturn NULL to terminate subsequent rpc_run_task, preventing NULL pointer\ndereference."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T09:28:29.991Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/db6f5ee1fc8f54d079d0751292c2fc2d78e3aad1"
        },
        {
          "url": "https://git.kernel.org/stable/c/4c189fd40a09a03f9a900bedb2d9064f1734d72a"
        },
        {
          "url": "https://git.kernel.org/stable/c/72f552e00c50f265896d3c19edc6696aa2910081"
        },
        {
          "url": "https://git.kernel.org/stable/c/85fb7f8ca5f8c138579fdfc9b97b3083e6077d40"
        },
        {
          "url": "https://git.kernel.org/stable/c/a6879a076b98c99c9fe747816fe1c29543442441"
        },
        {
          "url": "https://git.kernel.org/stable/c/da824f1271633bcb515ca8084cda3eda4b3ace51"
        },
        {
          "url": "https://git.kernel.org/stable/c/f601960af04d2ecb007c928ba153d34051acd9c1"
        },
        {
          "url": "https://git.kernel.org/stable/c/c457dc1ec770a22636b473ce5d35614adfe97636"
        }
      ],
      "title": "nfs: handle failure of nfs_get_lock_context in unlock path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38023",
    "datePublished": "2025-06-18T09:28:29.991Z",
    "dateReserved": "2025-04-16T04:51:23.977Z",
    "dateUpdated": "2025-06-18T09:28:29.991Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38023\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T10:15:34.100\",\"lastModified\":\"2025-06-18T13:46:52.973\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnfs: handle failure of nfs_get_lock_context in unlock path\\n\\nWhen memory is insufficient, the allocation of nfs_lock_context in\\nnfs_get_lock_context() fails and returns -ENOMEM. If we mistakenly treat\\nan nfs4_unlockdata structure (whose l_ctx member has been set to -ENOMEM)\\nas valid and proceed to execute rpc_run_task(), this will trigger a NULL\\npointer dereference in nfs4_locku_prepare. For example:\\n\\nBUG: kernel NULL pointer dereference, address: 000000000000000c\\nPGD 0 P4D 0\\nOops: Oops: 0000 [#1] SMP PTI\\nCPU: 15 UID: 0 PID: 12 Comm: kworker/u64:0 Not tainted 6.15.0-rc2-dirty #60\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40\\nWorkqueue: rpciod rpc_async_schedule\\nRIP: 0010:nfs4_locku_prepare+0x35/0xc2\\nCode: 89 f2 48 89 fd 48 c7 c7 68 69 ef b5 53 48 8b 8e 90 00 00 00 48 89 f3\\nRSP: 0018:ffffbbafc006bdb8 EFLAGS: 00010246\\nRAX: 000000000000004b RBX: ffff9b964fc1fa00 RCX: 0000000000000000\\nRDX: 0000000000000000 RSI: fffffffffffffff4 RDI: ffff9ba53fddbf40\\nRBP: ffff9ba539934000 R08: 0000000000000000 R09: ffffbbafc006bc38\\nR10: ffffffffb6b689c8 R11: 0000000000000003 R12: ffff9ba539934030\\nR13: 0000000000000001 R14: 0000000004248060 R15: ffffffffb56d1c30\\nFS: 0000000000000000(0000) GS:ffff9ba5881f0000(0000) knlGS:00000000\\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 000000000000000c CR3: 000000093f244000 CR4: 00000000000006f0\\nCall Trace:\\n \u003cTASK\u003e\\n __rpc_execute+0xbc/0x480\\n rpc_async_schedule+0x2f/0x40\\n process_one_work+0x232/0x5d0\\n worker_thread+0x1da/0x3d0\\n ? __pfx_worker_thread+0x10/0x10\\n kthread+0x10d/0x240\\n ? __pfx_kthread+0x10/0x10\\n ret_from_fork+0x34/0x50\\n ? __pfx_kthread+0x10/0x10\\n ret_from_fork_asm+0x1a/0x30\\n \u003c/TASK\u003e\\nModules linked in:\\nCR2: 000000000000000c\\n---[ end trace 0000000000000000 ]---\\n\\nFree the allocated nfs4_unlockdata when nfs_get_lock_context() fails and\\nreturn NULL to terminate subsequent rpc_run_task, preventing NULL pointer\\ndereference.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfs: fallo en el manejo de nfs_get_lock_context en la ruta de desbloqueo. Cuando la memoria es insuficiente, la asignaci\u00f3n de nfs_lock_context en nfs_get_lock_context() falla y devuelve -ENOMEM. Si por error tratamos una estructura nfs4_unlockdata (cuyo miembro l_ctx se ha establecido en -ENOMEM) como v\u00e1lida y procedemos a ejecutar rpc_run_task(), se activar\u00e1 una desreferencia de puntero NULL en nfs4_locku_prepare. Por ejemplo: ERROR: desreferencia de puntero NULL del n\u00facleo, direcci\u00f3n: 000000000000000c PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP PTI CPU: 15 UID: 0 PID: 12 Comm: kworker/u64:0 Not tainted 6.15.0-rc2-dirty #60 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 Workqueue: rpciod rpc_async_schedule RIP: 0010:nfs4_locku_prepare+0x35/0xc2 Code: 89 f2 48 89 fd 48 c7 c7 68 69 ef b5 53 48 8b 8e 90 00 00 00 48 89 f3 RSP: 0018:ffffbbafc006bdb8 EFLAGS: 00010246 RAX: 000000000000004b RBX: ffff9b964fc1fa00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: fffffffffffffff4 RDI: ffff9ba53fddbf40 RBP: ffff9ba539934000 R08: 0000000000000000 R09: ffffbbafc006bc38 R10: ffffffffb6b689c8 R11: 0000000000000003 R12: ffff9ba539934030 R13: 0000000000000001 R14: 0000000004248060 R15: ffffffffb56d1c30 FS: 0000000000000000(0000) GS:ffff9ba5881f0000(0000) knlGS:00000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000000c CR3: 000000093f244000 CR4: 00000000000006f0 Call Trace:  __rpc_execute+0xbc/0x480 rpc_async_schedule+0x2f/0x40 process_one_work+0x232/0x5d0 worker_thread+0x1da/0x3d0 ? __pfx_worker_thread+0x10/0x10 kthread+0x10d/0x240 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x34/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30  Modules linked in: CR2: 000000000000000c [ fin de seguimiento 0000000000000000 ]--- Libera el nfs4_unlockdata asignado cuando nfs_get_lock_context() falla y devuelve NULL para finalizar la rpc_run_task posterior, lo que evita la desreferencia del puntero NULL.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4c189fd40a09a03f9a900bedb2d9064f1734d72a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/72f552e00c50f265896d3c19edc6696aa2910081\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/85fb7f8ca5f8c138579fdfc9b97b3083e6077d40\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a6879a076b98c99c9fe747816fe1c29543442441\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c457dc1ec770a22636b473ce5d35614adfe97636\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/da824f1271633bcb515ca8084cda3eda4b3ace51\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/db6f5ee1fc8f54d079d0751292c2fc2d78e3aad1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f601960af04d2ecb007c928ba153d34051acd9c1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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