CVE-2025-39731 (GCVE-0-2025-39731)

Vulnerability from cvelistv5 – Published: 2025-09-07 15:16 – Updated: 2026-05-11 21:35
VLAI
Title
f2fs: vm_unmap_ram() may be called from an invalid context
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: vm_unmap_ram() may be called from an invalid context When testing F2FS with xfstests using UFS backed virtual disks the kernel complains sometimes that f2fs_release_decomp_mem() calls vm_unmap_ram() from an invalid context. Example trace from f2fs/007 test: f2fs/007 5s ... [12:59:38][ 8.902525] run fstests f2fs/007 [ 11.468026] BUG: sleeping function called from invalid context at mm/vmalloc.c:2978 [ 11.471849] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 68, name: irq/22-ufshcd [ 11.475357] preempt_count: 1, expected: 0 [ 11.476970] RCU nest depth: 0, expected: 0 [ 11.478531] CPU: 0 UID: 0 PID: 68 Comm: irq/22-ufshcd Tainted: G W 6.16.0-rc5-xfstests-ufs-g40f92e79b0aa #9 PREEMPT(none) [ 11.478535] Tainted: [W]=WARN [ 11.478536] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.478537] Call Trace: [ 11.478543] <TASK> [ 11.478545] dump_stack_lvl+0x4e/0x70 [ 11.478554] __might_resched.cold+0xaf/0xbe [ 11.478557] vm_unmap_ram+0x21/0xb0 [ 11.478560] f2fs_release_decomp_mem+0x59/0x80 [ 11.478563] f2fs_free_dic+0x18/0x1a0 [ 11.478565] f2fs_finish_read_bio+0xd7/0x290 [ 11.478570] blk_update_request+0xec/0x3b0 [ 11.478574] ? sbitmap_queue_clear+0x3b/0x60 [ 11.478576] scsi_end_request+0x27/0x1a0 [ 11.478582] scsi_io_completion+0x40/0x300 [ 11.478583] ufshcd_mcq_poll_cqe_lock+0xa3/0xe0 [ 11.478588] ufshcd_sl_intr+0x194/0x1f0 [ 11.478592] ufshcd_threaded_intr+0x68/0xb0 [ 11.478594] ? __pfx_irq_thread_fn+0x10/0x10 [ 11.478599] irq_thread_fn+0x20/0x60 [ 11.478602] ? __pfx_irq_thread_fn+0x10/0x10 [ 11.478603] irq_thread+0xb9/0x180 [ 11.478605] ? __pfx_irq_thread_dtor+0x10/0x10 [ 11.478607] ? __pfx_irq_thread+0x10/0x10 [ 11.478609] kthread+0x10a/0x230 [ 11.478614] ? __pfx_kthread+0x10/0x10 [ 11.478615] ret_from_fork+0x7e/0xd0 [ 11.478619] ? __pfx_kthread+0x10/0x10 [ 11.478621] ret_from_fork_asm+0x1a/0x30 [ 11.478623] </TASK> This patch modifies in_task() check inside f2fs_read_end_io() to also check if interrupts are disabled. This ensures that pages are unmapped asynchronously in an interrupt handler.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6971 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bff139b49d9f70c1ac5384aac94554846aa834de , < eb69e69a5ae6c8350957893b5f68bd55b1565fb2 (git)
Affected: bff139b49d9f70c1ac5384aac94554846aa834de , < 1023836d1b9465593c8746f97d608da32958785f (git)
Affected: bff139b49d9f70c1ac5384aac94554846aa834de , < 0fe7976b62546f1e95eebfe9879925e9aa22b7a8 (git)
Affected: bff139b49d9f70c1ac5384aac94554846aa834de , < 411e00f44e2e1a7fdb526013b25a7f0ed22a0947 (git)
Affected: bff139b49d9f70c1ac5384aac94554846aa834de , < 18eea36f4f460ead3750ed4afe5496f7ce55f99e (git)
Affected: bff139b49d9f70c1ac5384aac94554846aa834de , < 08a7efc5b02a0620ae16aa9584060e980a69cb55 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.148 , ≤ 6.1.* (semver)
Unaffected: 6.6.102 , ≤ 6.6.* (semver)
Unaffected: 6.12.42 , ≤ 6.12.* (semver)
Unaffected: 6.15.10 , ≤ 6.15.* (semver)
Unaffected: 6.16.1 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: vm_unmap_ram() may be called from an invalid context\n\nWhen testing F2FS with xfstests using UFS backed virtual disks the\nkernel complains sometimes that f2fs_release_decomp_mem() calls\nvm_unmap_ram() from an invalid context. Example trace from\nf2fs/007 test:\n\nf2fs/007 5s ...  [12:59:38][    8.902525] run fstests f2fs/007\n[   11.468026] BUG: sleeping function called from invalid context at mm/vmalloc.c:2978\n[   11.471849] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 68, name: irq/22-ufshcd\n[   11.475357] preempt_count: 1, expected: 0\n[   11.476970] RCU nest depth: 0, expected: 0\n[   11.478531] CPU: 0 UID: 0 PID: 68 Comm: irq/22-ufshcd Tainted: G        W           6.16.0-rc5-xfstests-ufs-g40f92e79b0aa #9 PREEMPT(none)\n[   11.478535] Tainted: [W]=WARN\n[   11.478536] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[   11.478537] Call Trace:\n[   11.478543]  \u003cTASK\u003e\n[   11.478545]  dump_stack_lvl+0x4e/0x70\n[   11.478554]  __might_resched.cold+0xaf/0xbe\n[   11.478557]  vm_unmap_ram+0x21/0xb0\n[   11.478560]  f2fs_release_decomp_mem+0x59/0x80\n[   11.478563]  f2fs_free_dic+0x18/0x1a0\n[   11.478565]  f2fs_finish_read_bio+0xd7/0x290\n[   11.478570]  blk_update_request+0xec/0x3b0\n[   11.478574]  ? sbitmap_queue_clear+0x3b/0x60\n[   11.478576]  scsi_end_request+0x27/0x1a0\n[   11.478582]  scsi_io_completion+0x40/0x300\n[   11.478583]  ufshcd_mcq_poll_cqe_lock+0xa3/0xe0\n[   11.478588]  ufshcd_sl_intr+0x194/0x1f0\n[   11.478592]  ufshcd_threaded_intr+0x68/0xb0\n[   11.478594]  ? __pfx_irq_thread_fn+0x10/0x10\n[   11.478599]  irq_thread_fn+0x20/0x60\n[   11.478602]  ? __pfx_irq_thread_fn+0x10/0x10\n[   11.478603]  irq_thread+0xb9/0x180\n[   11.478605]  ? __pfx_irq_thread_dtor+0x10/0x10\n[   11.478607]  ? __pfx_irq_thread+0x10/0x10\n[   11.478609]  kthread+0x10a/0x230\n[   11.478614]  ? __pfx_kthread+0x10/0x10\n[   11.478615]  ret_from_fork+0x7e/0xd0\n[   11.478619]  ? __pfx_kthread+0x10/0x10\n[   11.478621]  ret_from_fork_asm+0x1a/0x30\n[   11.478623]  \u003c/TASK\u003e\n\nThis patch modifies in_task() check inside f2fs_read_end_io() to also\ncheck if interrupts are disabled. This ensures that pages are unmapped\nasynchronously in an interrupt handler."
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: vm_unmap_ram() may be called from an invalid context\n\nWhen testing F2FS with xfstests using UFS backed virtual disks the\nkernel complains sometimes that f2fs_release_decomp_mem() calls\nvm_unmap_ram() from an invalid context. Example trace from\nf2fs/007 test:\n\nf2fs/007 5s ...  [12:59:38][    8.902525] run fstests f2fs/007\n[   11.468026] BUG: sleeping function called from invalid context at mm/vmalloc.c:2978\n[   11.471849] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 68, name: irq/22-ufshcd\n[   11.475357] preempt_count: 1, expected: 0\n[   11.476970] RCU nest depth: 0, expected: 0\n[   11.478531] CPU: 0 UID: 0 PID: 68 Comm: irq/22-ufshcd Tainted: G        W           6.16.0-rc5-xfstests-ufs-g40f92e79b0aa #9 PREEMPT(none)\n[   11.478535] Tainted: [W]=WARN\n[   11.478536] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[   11.478537] Call Trace:\n[   11.478543]  \u003cTASK\u003e\n[   11.478545]  dump_stack_lvl+0x4e/0x70\n[   11.478554]  __might_resched.cold+0xaf/0xbe\n[   11.478557]  vm_unmap_ram+0x21/0xb0\n[   11.478560]  f2fs_release_decomp_mem+0x59/0x80\n[   11.478563]  f2fs_free_dic+0x18/0x1a0\n[   11.478565]  f2fs_finish_read_bio+0xd7/0x290\n[   11.478570]  blk_update_request+0xec/0x3b0\n[   11.478574]  ? sbitmap_queue_clear+0x3b/0x60\n[   11.478576]  scsi_end_request+0x27/0x1a0\n[   11.478582]  scsi_io_completion+0x40/0x300\n[   11.478583]  ufshcd_mcq_poll_cqe_lock+0xa3/0xe0\n[   11.478588]  ufshcd_sl_intr+0x194/0x1f0\n[   11.478592]  ufshcd_threaded_intr+0x68/0xb0\n[   11.478594]  ? __pfx_irq_thread_fn+0x10/0x10\n[   11.478599]  irq_thread_fn+0x20/0x60\n[   11.478602]  ? __pfx_irq_thread_fn+0x10/0x10\n[   11.478603]  irq_thread+0xb9/0x180\n[   11.478605]  ? __pfx_irq_thread_dtor+0x10/0x10\n[   11.478607]  ? __pfx_irq_thread+0x10/0x10\n[   11.478609]  kthread+0x10a/0x230\n[   11.478614]  ? __pfx_kthread+0x10/0x10\n[   11.478615]  ret_from_fork+0x7e/0xd0\n[   11.478619]  ? __pfx_kthread+0x10/0x10\n[   11.478621]  ret_from_fork_asm+0x1a/0x30\n[   11.478623]  \u003c/TASK\u003e\n\nThis patch modifies in_task() check inside f2fs_read_end_io() to also\ncheck if interrupts are disabled. This ensures that pages are unmapped\nasynchronously in an interrupt handler."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nf2fs: vm_unmap_ram() puede ser llamada desde un contexto inv\u00e1lido\n\nAl probar F2FS con xfstests usando discos virtuales respaldados por UFS, el kernel se queja a veces de que f2fs_release_decomp_mem() llama a vm_unmap_ram() desde un contexto inv\u00e1lido. Ejemplo de traza de la prueba f2fs/007:\n\nf2fs/007 5s ... [12:59:38][ 8.902525] ejecutar fstests f2fs/007\n[ 11.468026] BUG: funci\u00f3n en suspensi\u00f3n llamada desde un contexto inv\u00e1lido en mm/vmalloc.c:2978\n[ 11.471849] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 68, nombre: irq/22-ufshcd\n[ 11.475357] preempt_count: 1, esperado: 0\n[ 11.476970] RCU nest depth: 0, esperado: 0\n[ 11.478531] CPU: 0 UID: 0 PID: 68 Comm: irq/22-ufshcd Tainted: G W 6.16.0-rc5-xfstests-ufs-g40f92e79b0aa #9 PREEMPT(none)\n[ 11.478535] Tainted: [W]=WARN\n[ 11.478536] Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[ 11.478537] Traza de Llamada:\n[ 11.478543] \u003cTAREA\u003e\n[ 11.478545] dump_stack_lvl+0x4e/0x70\n[ 11.478554] __might_resched.cold+0xaf/0xbe\n[ 11.478557] vm_unmap_ram+0x21/0xb0\n[ 11.478560] f2fs_release_decomp_mem+0x59/0x80\n[ 11.478563] f2fs_free_dic+0x18/0x1a0\n[ 11.478565] f2fs_finish_read_bio+0xd7/0x290\n[ 11.478570] blk_update_request+0xec/0x3b0\n[ 11.478574] ? sbitmap_queue_clear+0x3b/0x60\n[ 11.478576] scsi_end_request+0x27/0x1a0\n[ 11.478582] scsi_io_completion+0x40/0x300\n[ 11.478583] ufshcd_mcq_poll_cqe_lock+0xa3/0xe0\n[ 11.478588] ufshcd_sl_intr+0x194/0x1f0\n[ 11.478592] ufshcd_threaded_intr+0x68/0xb0\n[ 11.478594] ? __pfx_irq_thread_fn+0x10/0x10\n[ 11.478599] irq_thread_fn+0x20/0x60\n[ 11.478602] ? __pfx_irq_thread_fn+0x10/0x10\n[ 11.478603] irq_thread+0xb9/0x180\n[ 11.478605] ? __pfx_irq_thread_dtor+0x10/0x10\n[ 11.478607] ? __pfx_irq_thread+0x10/0x10\n[ 11.478609] kthread+0x10a/0x230\n[ 11.478614] ? __pfx_kthread+0x10/0x10\n[ 11.478615] ret_from_fork+0x7e/0xd0\n[ 11.478619] ? __pfx_kthread+0x10/0x10\n[ 11.478621] ret_from_fork_asm+0x1a/0x30\n[ 11.478623] \u003c/TAREA\u003e\n\nEste parche modifica la comprobaci\u00f3n in_task() dentro de f2fs_read_end_io() para tambi\u00e9n verificar si las interrupciones est\u00e1n deshabilitadas. Esto asegura que las p\u00e1ginas se desmapean asincr\u00f3nicamente en un gestor de interrupciones."
          }
        ],
        "id": "CVE-2025-39731",
        "lastModified": "2026-10-19T21:10:00.160",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-09-07T16:15:48.547",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/08a7efc5b02a0620ae16aa9584060e980a69cb55"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0fe7976b62546f1e95eebfe9879925e9aa22b7a8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/1023836d1b9465593c8746f97d608da32958785f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/18eea36f4f460ead3750ed4afe5496f7ce55f99e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/411e00f44e2e1a7fdb526013b25a7f0ed22a0947"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/eb69e69a5ae6c8350957893b5f68bd55b1565fb2"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:22:41+00:00",
      "cve": "CVE-2025-39731",
      "id": "CVE-2025-39731",
      "initial_release_date": "2025-09-07T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: f2fs: vm_unmap_ram() may be called from an invalid context",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39731.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T01:17:11Z",
      "cve": "CVE-2025-39731",
      "id": "CVE-2025-39731",
      "initial_release_date": "2025-09-07T23:22:08Z",
      "product_status:known_not_affected": "523",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-39731",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-39731.json",
      "version": "11"
    }
  }
}



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