CVE-2025-38139 (GCVE-0-2025-38139)
Vulnerability from cvelistv5
Published
2025-07-03 08:35
Modified
2025-07-28 04:13
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix oops in write-retry from mis-resetting the subreq iterator Fix the resetting of the subrequest iterator in netfs_retry_write_stream() to use the iterator-reset function as the iterator may have been shortened by a previous retry. In such a case, the amount of data to be written by the subrequest is not "subreq->len" but "subreq->len - subreq->transferred". Without this, KASAN may see an error in iov_iter_revert(): BUG: KASAN: slab-out-of-bounds in iov_iter_revert lib/iov_iter.c:633 [inline] BUG: KASAN: slab-out-of-bounds in iov_iter_revert+0x443/0x5a0 lib/iov_iter.c:611 Read of size 4 at addr ffff88802912a0b8 by task kworker/u32:7/1147 CPU: 1 UID: 0 PID: 1147 Comm: kworker/u32:7 Not tainted 6.15.0-rc6-syzkaller-00052-g9f35e33144ae #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: events_unbound netfs_write_collection_worker Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xc3/0x670 mm/kasan/report.c:521 kasan_report+0xe0/0x110 mm/kasan/report.c:634 iov_iter_revert lib/iov_iter.c:633 [inline] iov_iter_revert+0x443/0x5a0 lib/iov_iter.c:611 netfs_retry_write_stream fs/netfs/write_retry.c:44 [inline] netfs_retry_writes+0x166d/0x1a50 fs/netfs/write_retry.c:231 netfs_collect_write_results fs/netfs/write_collect.c:352 [inline] netfs_write_collection_worker+0x23fd/0x3830 fs/netfs/write_collect.c:374 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK>
References
Impacted products
Vendor Product Version
Linux Linux Version: cd0277ed0c188dd40e7744e89299af7b78831ca4
Version: cd0277ed0c188dd40e7744e89299af7b78831ca4
Version: cd0277ed0c188dd40e7744e89299af7b78831ca4
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/netfs/write_retry.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e0fefe9bc07e6101fdc57abda3644f296c114e31",
              "status": "affected",
              "version": "cd0277ed0c188dd40e7744e89299af7b78831ca4",
              "versionType": "git"
            },
            {
              "lessThan": "bd0edaf99a920b1a9decd773179caacacb61d0fd",
              "status": "affected",
              "version": "cd0277ed0c188dd40e7744e89299af7b78831ca4",
              "versionType": "git"
            },
            {
              "lessThan": "4481f7f2b3df123ec77e828c849138f75cff2bf2",
              "status": "affected",
              "version": "cd0277ed0c188dd40e7744e89299af7b78831ca4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/netfs/write_retry.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.37",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.3",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix oops in write-retry from mis-resetting the subreq iterator\n\nFix the resetting of the subrequest iterator in netfs_retry_write_stream()\nto use the iterator-reset function as the iterator may have been shortened\nby a previous retry.  In such a case, the amount of data to be written by\nthe subrequest is not \"subreq-\u003elen\" but \"subreq-\u003elen -\nsubreq-\u003etransferred\".\n\nWithout this, KASAN may see an error in iov_iter_revert():\n\n   BUG: KASAN: slab-out-of-bounds in iov_iter_revert lib/iov_iter.c:633 [inline]\n   BUG: KASAN: slab-out-of-bounds in iov_iter_revert+0x443/0x5a0 lib/iov_iter.c:611\n   Read of size 4 at addr ffff88802912a0b8 by task kworker/u32:7/1147\n\n   CPU: 1 UID: 0 PID: 1147 Comm: kworker/u32:7 Not tainted 6.15.0-rc6-syzkaller-00052-g9f35e33144ae #0 PREEMPT(full)\n   Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\n   Workqueue: events_unbound netfs_write_collection_worker\n   Call Trace:\n    \u003cTASK\u003e\n    __dump_stack lib/dump_stack.c:94 [inline]\n    dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120\n    print_address_description mm/kasan/report.c:408 [inline]\n    print_report+0xc3/0x670 mm/kasan/report.c:521\n    kasan_report+0xe0/0x110 mm/kasan/report.c:634\n    iov_iter_revert lib/iov_iter.c:633 [inline]\n    iov_iter_revert+0x443/0x5a0 lib/iov_iter.c:611\n    netfs_retry_write_stream fs/netfs/write_retry.c:44 [inline]\n    netfs_retry_writes+0x166d/0x1a50 fs/netfs/write_retry.c:231\n    netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]\n    netfs_write_collection_worker+0x23fd/0x3830 fs/netfs/write_collect.c:374\n    process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238\n    process_scheduled_works kernel/workqueue.c:3319 [inline]\n    worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400\n    kthread+0x3c2/0x780 kernel/kthread.c:464\n    ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153\n    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n    \u003c/TASK\u003e"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:13:17.620Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e0fefe9bc07e6101fdc57abda3644f296c114e31"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd0edaf99a920b1a9decd773179caacacb61d0fd"
        },
        {
          "url": "https://git.kernel.org/stable/c/4481f7f2b3df123ec77e828c849138f75cff2bf2"
        }
      ],
      "title": "netfs: Fix oops in write-retry from mis-resetting the subreq iterator",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38139",
    "datePublished": "2025-07-03T08:35:41.271Z",
    "dateReserved": "2025-04-16T04:51:23.987Z",
    "dateUpdated": "2025-07-28T04:13:17.620Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38139\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-03T09:15:28.500\",\"lastModified\":\"2025-07-10T15:15:26.740\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfs: Fix oops in write-retry from mis-resetting the subreq iterator\\n\\nFix the resetting of the subrequest iterator in netfs_retry_write_stream()\\nto use the iterator-reset function as the iterator may have been shortened\\nby a previous retry.  In such a case, the amount of data to be written by\\nthe subrequest is not \\\"subreq-\u003elen\\\" but \\\"subreq-\u003elen -\\nsubreq-\u003etransferred\\\".\\n\\nWithout this, KASAN may see an error in iov_iter_revert():\\n\\n   BUG: KASAN: slab-out-of-bounds in iov_iter_revert lib/iov_iter.c:633 [inline]\\n   BUG: KASAN: slab-out-of-bounds in iov_iter_revert+0x443/0x5a0 lib/iov_iter.c:611\\n   Read of size 4 at addr ffff88802912a0b8 by task kworker/u32:7/1147\\n\\n   CPU: 1 UID: 0 PID: 1147 Comm: kworker/u32:7 Not tainted 6.15.0-rc6-syzkaller-00052-g9f35e33144ae #0 PREEMPT(full)\\n   Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\\n   Workqueue: events_unbound netfs_write_collection_worker\\n   Call Trace:\\n    \u003cTASK\u003e\\n    __dump_stack lib/dump_stack.c:94 [inline]\\n    dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120\\n    print_address_description mm/kasan/report.c:408 [inline]\\n    print_report+0xc3/0x670 mm/kasan/report.c:521\\n    kasan_report+0xe0/0x110 mm/kasan/report.c:634\\n    iov_iter_revert lib/iov_iter.c:633 [inline]\\n    iov_iter_revert+0x443/0x5a0 lib/iov_iter.c:611\\n    netfs_retry_write_stream fs/netfs/write_retry.c:44 [inline]\\n    netfs_retry_writes+0x166d/0x1a50 fs/netfs/write_retry.c:231\\n    netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]\\n    netfs_write_collection_worker+0x23fd/0x3830 fs/netfs/write_collect.c:374\\n    process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238\\n    process_scheduled_works kernel/workqueue.c:3319 [inline]\\n    worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400\\n    kthread+0x3c2/0x780 kernel/kthread.c:464\\n    ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153\\n    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\\n    \u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfs: Se corrige un error en el reintento de escritura debido al restablecimiento incorrecto del iterador de la subsolicitud. Se corrige el restablecimiento del iterador de la subsolicitud en netfs_retry_write_stream() para usar la funci\u00f3n iterator-reset, ya que el iterador podr\u00eda haberse acortado debido a un reintento anterior. En tal caso, la cantidad de datos que debe escribir la subsolicitud no es \\\"subreq-\u0026gt;len\\\", sino \\\"subreq-\u0026gt;len - subreq-\u0026gt;transferred\\\". Sin esto, KASAN puede ver un error en iov_iter_revert(): ERROR: KASAN: slab-out-of-bounds en iov_iter_revert lib/iov_iter.c:633 [en l\u00ednea] ERROR: KASAN: slab-out-of-bounds en iov_iter_revert+0x443/0x5a0 lib/iov_iter.c:611 Lectura de tama\u00f1o 4 en la direcci\u00f3n ffff88802912a0b8 por la tarea kworker/u32:7/1147 CPU: 1 UID: 0 PID: 1147 Comm: kworker/u32:7 No contaminado 6.15.0-rc6-syzkaller-00052-g9f35e33144ae #0 PREEMPT(full) Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 01/04/2014 Cola de trabajo: events_unbound netfs_write_collection_worker Rastreo de llamadas  __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xc3/0x670 mm/kasan/report.c:521 kasan_report+0xe0/0x110 mm/kasan/report.c:634 iov_iter_revert lib/iov_iter.c:633 [inline] iov_iter_revert+0x443/0x5a0 lib/iov_iter.c:611 netfs_retry_write_stream fs/netfs/write_retry.c:44 [inline] netfs_retry_writes+0x166d/0x1a50 fs/netfs/write_retry.c:231 netfs_collect_write_results fs/netfs/write_collect.c:352 [inline] netfs_write_collection_worker+0x23fd/0x3830 fs/netfs/write_collect.c:374 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245  \"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4481f7f2b3df123ec77e828c849138f75cff2bf2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bd0edaf99a920b1a9decd773179caacacb61d0fd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e0fefe9bc07e6101fdc57abda3644f296c114e31\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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