CVE-2025-38034 (GCVE-0-2025-38034)
Vulnerability from cvelistv5
Published
2025-06-18 09:33
Modified
2025-06-18 09:33
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: correct the order of prelim_ref arguments in btrfs__prelim_ref btrfs_prelim_ref() calls the old and new reference variables in the incorrect order. This causes a NULL pointer dereference because oldref is passed as NULL to trace_btrfs_prelim_ref_insert(). Note, trace_btrfs_prelim_ref_insert() is being called with newref as oldref (and oldref as NULL) on purpose in order to print out the values of newref. To reproduce: echo 1 > /sys/kernel/debug/tracing/events/btrfs/btrfs_prelim_ref_insert/enable Perform some writeback operations. Backtrace: BUG: kernel NULL pointer dereference, address: 0000000000000018 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 115949067 P4D 115949067 PUD 11594a067 PMD 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 1 UID: 0 PID: 1188 Comm: fsstress Not tainted 6.15.0-rc2-tester+ #47 PREEMPT(voluntary) 7ca2cef72d5e9c600f0c7718adb6462de8149622 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-2-gc13ff2cd-prebuilt.qemu.org 04/01/2014 RIP: 0010:trace_event_raw_event_btrfs__prelim_ref+0x72/0x130 Code: e8 43 81 9f ff 48 85 c0 74 78 4d 85 e4 0f 84 8f 00 00 00 49 8b 94 24 c0 06 00 00 48 8b 0a 48 89 48 08 48 8b 52 08 48 89 50 10 <49> 8b 55 18 48 89 50 18 49 8b 55 20 48 89 50 20 41 0f b6 55 28 88 RSP: 0018:ffffce44820077a0 EFLAGS: 00010286 RAX: ffff8c6b403f9014 RBX: ffff8c6b55825730 RCX: 304994edf9cf506b RDX: d8b11eb7f0fdb699 RSI: ffff8c6b403f9010 RDI: ffff8c6b403f9010 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000010 R10: 00000000ffffffff R11: 0000000000000000 R12: ffff8c6b4e8fb000 R13: 0000000000000000 R14: ffffce44820077a8 R15: ffff8c6b4abd1540 FS: 00007f4dc6813740(0000) GS:ffff8c6c1d378000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000018 CR3: 000000010eb42000 CR4: 0000000000750ef0 PKRU: 55555554 Call Trace: <TASK> prelim_ref_insert+0x1c1/0x270 find_parent_nodes+0x12a6/0x1ee0 ? __entry_text_end+0x101f06/0x101f09 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 btrfs_is_data_extent_shared+0x167/0x640 ? fiemap_process_hole+0xd0/0x2c0 extent_fiemap+0xa5c/0xbc0 ? __entry_text_end+0x101f05/0x101f09 btrfs_fiemap+0x7e/0xd0 do_vfs_ioctl+0x425/0x9d0 __x64_sys_ioctl+0x75/0xc0
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/trace/events/btrfs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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        },
        {
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "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": "5.15.185",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.31",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.9",
              "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",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "5.10.238",
                  "vulnerable": true
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                {
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                  "versionEndExcluding": "5.15.185",
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                  "versionEndExcluding": "6.1.141",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.93",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.31",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: correct the order of prelim_ref arguments in btrfs__prelim_ref\n\nbtrfs_prelim_ref() calls the old and new reference variables in the\nincorrect order. This causes a NULL pointer dereference because oldref\nis passed as NULL to trace_btrfs_prelim_ref_insert().\n\nNote, trace_btrfs_prelim_ref_insert() is being called with newref as\noldref (and oldref as NULL) on purpose in order to print out\nthe values of newref.\n\nTo reproduce:\necho 1 \u003e /sys/kernel/debug/tracing/events/btrfs/btrfs_prelim_ref_insert/enable\n\nPerform some writeback operations.\n\nBacktrace:\nBUG: kernel NULL pointer dereference, address: 0000000000000018\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 115949067 P4D 115949067 PUD 11594a067 PMD 0\n Oops: Oops: 0000 [#1] SMP NOPTI\n CPU: 1 UID: 0 PID: 1188 Comm: fsstress Not tainted 6.15.0-rc2-tester+ #47 PREEMPT(voluntary)  7ca2cef72d5e9c600f0c7718adb6462de8149622\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-2-gc13ff2cd-prebuilt.qemu.org 04/01/2014\n RIP: 0010:trace_event_raw_event_btrfs__prelim_ref+0x72/0x130\n Code: e8 43 81 9f ff 48 85 c0 74 78 4d 85 e4 0f 84 8f 00 00 00 49 8b 94 24 c0 06 00 00 48 8b 0a 48 89 48 08 48 8b 52 08 48 89 50 10 \u003c49\u003e 8b 55 18 48 89 50 18 49 8b 55 20 48 89 50 20 41 0f b6 55 28 88\n RSP: 0018:ffffce44820077a0 EFLAGS: 00010286\n RAX: ffff8c6b403f9014 RBX: ffff8c6b55825730 RCX: 304994edf9cf506b\n RDX: d8b11eb7f0fdb699 RSI: ffff8c6b403f9010 RDI: ffff8c6b403f9010\n RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000010\n R10: 00000000ffffffff R11: 0000000000000000 R12: ffff8c6b4e8fb000\n R13: 0000000000000000 R14: ffffce44820077a8 R15: ffff8c6b4abd1540\n FS:  00007f4dc6813740(0000) GS:ffff8c6c1d378000(0000) knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000018 CR3: 000000010eb42000 CR4: 0000000000750ef0\n PKRU: 55555554\n Call Trace:\n  \u003cTASK\u003e\n  prelim_ref_insert+0x1c1/0x270\n  find_parent_nodes+0x12a6/0x1ee0\n  ? __entry_text_end+0x101f06/0x101f09\n  ? srso_alias_return_thunk+0x5/0xfbef5\n  ? srso_alias_return_thunk+0x5/0xfbef5\n  ? srso_alias_return_thunk+0x5/0xfbef5\n  ? srso_alias_return_thunk+0x5/0xfbef5\n  btrfs_is_data_extent_shared+0x167/0x640\n  ? fiemap_process_hole+0xd0/0x2c0\n  extent_fiemap+0xa5c/0xbc0\n  ? __entry_text_end+0x101f05/0x101f09\n  btrfs_fiemap+0x7e/0xd0\n  do_vfs_ioctl+0x425/0x9d0\n  __x64_sys_ioctl+0x75/0xc0"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T09:33:21.120Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5755b6731655e248c4f1d52a2e1b18795b4a2a3a"
        },
        {
          "url": "https://git.kernel.org/stable/c/a641154cedf9d69730f8af5d0a901fe86e6486bd"
        },
        {
          "url": "https://git.kernel.org/stable/c/a876703894a6dd6e8c04b0635d86e9f7a7c81b79"
        },
        {
          "url": "https://git.kernel.org/stable/c/0528bba48dce7820d2da72e1a114e1c4552367eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/7a97f961a568a8f72472dc804af02a0f73152c5f"
        },
        {
          "url": "https://git.kernel.org/stable/c/7f7c8c03feba5f2454792fab3bb8bd45bd6883f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/137bfa08c6441f324d00692d1e9d22cfd773329b"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc7e0975093567f51be8e1bdf4aa5900a3cf0b1e"
        }
      ],
      "title": "btrfs: correct the order of prelim_ref arguments in btrfs__prelim_ref",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38034",
    "datePublished": "2025-06-18T09:33:21.120Z",
    "dateReserved": "2025-04-16T04:51:23.978Z",
    "dateUpdated": "2025-06-18T09:33:21.120Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38034\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T10:15:35.593\",\"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\\nbtrfs: correct the order of prelim_ref arguments in btrfs__prelim_ref\\n\\nbtrfs_prelim_ref() calls the old and new reference variables in the\\nincorrect order. This causes a NULL pointer dereference because oldref\\nis passed as NULL to trace_btrfs_prelim_ref_insert().\\n\\nNote, trace_btrfs_prelim_ref_insert() is being called with newref as\\noldref (and oldref as NULL) on purpose in order to print out\\nthe values of newref.\\n\\nTo reproduce:\\necho 1 \u003e /sys/kernel/debug/tracing/events/btrfs/btrfs_prelim_ref_insert/enable\\n\\nPerform some writeback operations.\\n\\nBacktrace:\\nBUG: kernel NULL pointer dereference, address: 0000000000000018\\n #PF: supervisor read access in kernel mode\\n #PF: error_code(0x0000) - not-present page\\n PGD 115949067 P4D 115949067 PUD 11594a067 PMD 0\\n Oops: Oops: 0000 [#1] SMP NOPTI\\n CPU: 1 UID: 0 PID: 1188 Comm: fsstress Not tainted 6.15.0-rc2-tester+ #47 PREEMPT(voluntary)  7ca2cef72d5e9c600f0c7718adb6462de8149622\\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-2-gc13ff2cd-prebuilt.qemu.org 04/01/2014\\n RIP: 0010:trace_event_raw_event_btrfs__prelim_ref+0x72/0x130\\n Code: e8 43 81 9f ff 48 85 c0 74 78 4d 85 e4 0f 84 8f 00 00 00 49 8b 94 24 c0 06 00 00 48 8b 0a 48 89 48 08 48 8b 52 08 48 89 50 10 \u003c49\u003e 8b 55 18 48 89 50 18 49 8b 55 20 48 89 50 20 41 0f b6 55 28 88\\n RSP: 0018:ffffce44820077a0 EFLAGS: 00010286\\n RAX: ffff8c6b403f9014 RBX: ffff8c6b55825730 RCX: 304994edf9cf506b\\n RDX: d8b11eb7f0fdb699 RSI: ffff8c6b403f9010 RDI: ffff8c6b403f9010\\n RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000010\\n R10: 00000000ffffffff R11: 0000000000000000 R12: ffff8c6b4e8fb000\\n R13: 0000000000000000 R14: ffffce44820077a8 R15: ffff8c6b4abd1540\\n FS:  00007f4dc6813740(0000) GS:ffff8c6c1d378000(0000) knlGS:0000000000000000\\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 0000000000000018 CR3: 000000010eb42000 CR4: 0000000000750ef0\\n PKRU: 55555554\\n Call Trace:\\n  \u003cTASK\u003e\\n  prelim_ref_insert+0x1c1/0x270\\n  find_parent_nodes+0x12a6/0x1ee0\\n  ? __entry_text_end+0x101f06/0x101f09\\n  ? srso_alias_return_thunk+0x5/0xfbef5\\n  ? srso_alias_return_thunk+0x5/0xfbef5\\n  ? srso_alias_return_thunk+0x5/0xfbef5\\n  ? srso_alias_return_thunk+0x5/0xfbef5\\n  btrfs_is_data_extent_shared+0x167/0x640\\n  ? fiemap_process_hole+0xd0/0x2c0\\n  extent_fiemap+0xa5c/0xbc0\\n  ? __entry_text_end+0x101f05/0x101f09\\n  btrfs_fiemap+0x7e/0xd0\\n  do_vfs_ioctl+0x425/0x9d0\\n  __x64_sys_ioctl+0x75/0xc0\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: corregir el orden de los argumentos prelim_ref en btrfs__prelim_ref. btrfs_prelim_ref() llama a las variables de referencia antiguas y nuevas en un orden incorrecto. Esto provoca una desreferencia de puntero nulo, ya que oldref se pasa como nulo a trace_btrfs_prelim_ref_insert(). Tenga en cuenta que trace_btrfs_prelim_ref_insert() se llama con newref como oldref (y oldref como nulo) a prop\u00f3sito para imprimir los valores de newref. Para reproducir: echo 1 \u0026gt; /sys/kernel/debug/tracing/events/btrfs/btrfs_prelim_ref_insert/enable. Realice algunas operaciones de escritura diferida. Backtrace: BUG: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000018 #PF: acceso de lectura del supervisor en modo kernel #PF: error_code(0x0000) - p\u00e1gina no presente PGD 115949067 P4D 115949067 PUD 11594a067 PMD 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 1 UID: 0 PID: 1188 Comm: fsstress No contaminado 6.15.0-rc2-tester+ #47 PREEMPT(voluntario) 7ca2cef72d5e9c600f0c7718adb6462de8149622 Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-2-gc13ff2cd-prebuilt.qemu.org 01/04/2014 RIP: 0010:trace_event_raw_event_btrfs__prelim_ref+0x72/0x130 C\u00f3digo: e8 43 81 9f ff 48 85 c0 74 78 4d 85 e4 0f 84 8f 00 00 00 49 8b 94 24 c0 06 00 00 48 8b 0a 48 89 48 08 48 8b 52 08 48 89 50 10 \u0026lt;49\u0026gt; 8b 55 18 48 89 50 18 49 8b 55 20 48 89 50 20 41 0f b6 55 28 88 RSP: 0018:ffffce44820077a0 EFLAGS: 00010286 RAX: ffff8c6b403f9014 RBX: ffff8c6b55825730 RCX: 304994edf9cf506b RDX: d8b11eb7f0fdb699 RSI: ffff8c6b403f9010 RDI: ffff8c6b403f9010 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000010 R10: 00000000ffffffff R11: 0000000000000000 R12: ffff8c6b4e8fb000 R13: 0000000000000000 R14: ffffce44820077a8 R15: ffff8c6b4abd1540 FS: 00007f4dc6813740(0000) GS:ffff8c6c1d378000(0000) knlGS:000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000080050033 CR2: 000000000000018 CR3: 000000010eb42000 CR4: 0000000000750ef0 PKRU: 55555554 Rastreo de llamadas:  prelim_ref_insert+0x1c1/0x270 find_parent_nodes+0x12a6/0x1ee0 ? __entry_text_end+0x101f06/0x101f09 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 btrfs_is_data_extent_shared+0x167/0x640 ? fiemap_process_hole+0xd0/0x2c0 extent_fiemap+0xa5c/0xbc0 ? __entry_text_end+0x101f05/0x101f09 btrfs_fiemap+0x7e/0xd0 do_vfs_ioctl+0x425/0x9d0 __x64_sys_ioctl+0x75/0xc0 \"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0528bba48dce7820d2da72e1a114e1c4552367eb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/137bfa08c6441f324d00692d1e9d22cfd773329b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5755b6731655e248c4f1d52a2e1b18795b4a2a3a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7a97f961a568a8f72472dc804af02a0f73152c5f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7f7c8c03feba5f2454792fab3bb8bd45bd6883f9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a641154cedf9d69730f8af5d0a901fe86e6486bd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a876703894a6dd6e8c04b0635d86e9f7a7c81b79\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bc7e0975093567f51be8e1bdf4aa5900a3cf0b1e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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