CVE-2025-21725

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix oops due to unset link speed

It isn't guaranteed that NETWORK_INTERFACE_INFO::LinkSpeed will always be set by the server, so the client must handle any values and then prevent oopses like below from happening:

Fix this by setting cifs_server_iface::speed to a sane value (1Gbps) by default when link speed is unset.

Detalles técnicos trazas, registros y código del informe original

Oops: divide error: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 1323 Comm: cat Not tainted 6.13.0-rc7 #2
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41
04/01/2014
RIP: 0010:cifs_debug_data_proc_show+0xa45/0x1460 [cifs] Code: 00 00 48
89 df e8 3b cd 1b c1 41 f6 44 24 2c 04 0f 84 50 01 00 00 48 89 ef e8
e7 d0 1b c1 49 8b 44 24 18 31 d2 49 8d 7c 24 28 <48> f7 74 24 18 48 89
c3 e8 6e cf 1b c1 41 8b 6c 24 28 49 8d 7c 24
RSP: 0018:ffffc90001817be0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88811230022c RCX: ffffffffc041bd99
RDX: 0000000000000000 RSI: 0000000000000567 RDI: ffff888112300228
RBP: ffff888112300218 R08: fffff52000302f5f R09: ffffed1022fa58ac
R10: ffff888117d2c566 R11: 00000000fffffffe R12: ffff888112300200
R13: 000000012a15343f R14: 0000000000000001 R15: ffff888113f2db58
FS: 00007fe27119e740(0000) GS:ffff888148600000(0000)
knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe2633c5000 CR3: 0000000124da0000 CR4: 0000000000750ef0
PKRU: 55555554
Call Trace:
 <TASK>
 ? __die_body.cold+0x19/0x27
 ? die+0x2e/0x50
 ? do_trap+0x159/0x1b0
 ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]
 ? do_error_trap+0x90/0x130
 ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]
 ? exc_divide_error+0x39/0x50
 ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]
 ? asm_exc_divide_error+0x1a/0x20
 ? cifs_debug_data_proc_show+0xa39/0x1460 [cifs]
 ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]
 ? seq_read_iter+0x42e/0x790
 seq_read_iter+0x19a/0x790
 proc_reg_read_iter+0xbe/0x110
 ? __pfx_proc_reg_read_iter+0x10/0x10
 vfs_read+0x469/0x570
 ? do_user_addr_fault+0x398/0x760
 ? __pfx_vfs_read+0x10/0x10
 ? find_held_lock+0x8a/0xa0
 ? __pfx_lock_release+0x10/0x10
 ksys_read+0xd3/0x170
 ? __pfx_ksys_read+0x10/0x10
 ? __rcu_read_unlock+0x50/0x270
 ? mark_held_locks+0x1a/0x90
 do_syscall_64+0xbb/0x1d0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe271288911
Code: 00 48 8b 15 01 25 10 00 f7 d8 64 89 02 b8 ff ff ff ff eb bd e8
20 ad 01 00 f3 0f 1e fa 80 3d b5 a7 10 00 00 74 13 31 c0 0f 05 <48> 3d
00 f0 ff ff 77 4f c3 66 0f 1f 44 00 00 55 48 89 e5 48 83 ec
RSP: 002b:00007ffe87c079d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000040000 RCX: 00007fe271288911
RDX: 0000000000040000 RSI: 00007fe2633c6000 RDI: 0000000000000003
RBP: 00007ffe87c07a00 R08: 0000000000000000 R09: 00007fe2713e6380
R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000040000
R13: 00007fe2633c6000 R14: 0000000000000003 R15: 0000000000000000
 </TASK>

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.39%
Percentil entre todas las CVEs puntuadas: 30
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2025-21725",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "548893404c44fc01a59f17727876e02553146fe6",
              "lessThan": "208e102a2fca44e40a6c3f7b9e2609cfd17a15aa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1cd8c353708de99d8bfa7db8a0c961a800b1fa7f",
              "lessThan": "3f901c35e1a1b3ed1b528a17ffdb941aa0294458",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a6d8fb54a515f0546ffdb7870102b1238917e567",
              "lessThan": "699179dfc8d7da457b152ca5d18ae45f9ed9beaa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a6d8fb54a515f0546ffdb7870102b1238917e567",
              "lessThan": "ad3b49fbdb156aa8ee2026ba590642c9b5a410f2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a6d8fb54a515f0546ffdb7870102b1238917e567",
              "lessThan": "be7a6a77669588bfa5022a470989702bbbb11e7f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6.1.65",
              "lessThan": "6.1.129",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.6.4",
              "lessThan": "6.6.76",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "fs/smb/client/smb2ops.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.7",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.129",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.76",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.13",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.13.2",
              "versionType": "semver",
              "lessThanOrEqual": "6.13.*"
            },
            {
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/smb/client/smb2ops.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-02-27T02:15:16.220",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/208e102a2fca44e40a6c3f7b9e2609cfd17a15aa",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3f901c35e1a1b3ed1b528a17ffdb941aa0294458",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/699179dfc8d7da457b152ca5d18ae45f9ed9beaa",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ad3b49fbdb156aa8ee2026ba590642c9b5a410f2",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/be7a6a77669588bfa5022a470989702bbbb11e7f",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix oops due to unset link speed\n\nIt isn't guaranteed that NETWORK_INTERFACE_INFO::LinkSpeed will always\nbe set by the server, so the client must handle any values and then\nprevent oopses like below from happening:\n\nOops: divide error: 0000 [#1] PREEMPT SMP KASAN NOPTI\nCPU: 0 UID: 0 PID: 1323 Comm: cat Not tainted 6.13.0-rc7 #2\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41\n04/01/2014\nRIP: 0010:cifs_debug_data_proc_show+0xa45/0x1460 [cifs] Code: 00 00 48\n89 df e8 3b cd 1b c1 41 f6 44 24 2c 04 0f 84 50 01 00 00 48 89 ef e8\ne7 d0 1b c1 49 8b 44 24 18 31 d2 49 8d 7c 24 28 <48> f7 74 24 18 48 89\nc3 e8 6e cf 1b c1 41 8b 6c 24 28 49 8d 7c 24\nRSP: 0018:ffffc90001817be0 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: ffff88811230022c RCX: ffffffffc041bd99\nRDX: 0000000000000000 RSI: 0000000000000567 RDI: ffff888112300228\nRBP: ffff888112300218 R08: fffff52000302f5f R09: ffffed1022fa58ac\nR10: ffff888117d2c566 R11: 00000000fffffffe R12: ffff888112300200\nR13: 000000012a15343f R14: 0000000000000001 R15: ffff888113f2db58\nFS: 00007fe27119e740(0000) GS:ffff888148600000(0000)\nknlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fe2633c5000 CR3: 0000000124da0000 CR4: 0000000000750ef0\nPKRU: 55555554\nCall Trace:\n <TASK>\n ? __die_body.cold+0x19/0x27\n ? die+0x2e/0x50\n ? do_trap+0x159/0x1b0\n ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]\n ? do_error_trap+0x90/0x130\n ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]\n ? exc_divide_error+0x39/0x50\n ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]\n ? asm_exc_divide_error+0x1a/0x20\n ? cifs_debug_data_proc_show+0xa39/0x1460 [cifs]\n ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]\n ? seq_read_iter+0x42e/0x790\n seq_read_iter+0x19a/0x790\n proc_reg_read_iter+0xbe/0x110\n ? __pfx_proc_reg_read_iter+0x10/0x10\n vfs_read+0x469/0x570\n ? do_user_addr_fault+0x398/0x760\n ? __pfx_vfs_read+0x10/0x10\n ? find_held_lock+0x8a/0xa0\n ? __pfx_lock_release+0x10/0x10\n ksys_read+0xd3/0x170\n ? __pfx_ksys_read+0x10/0x10\n ? __rcu_read_unlock+0x50/0x270\n ? mark_held_locks+0x1a/0x90\n do_syscall_64+0xbb/0x1d0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fe271288911\nCode: 00 48 8b 15 01 25 10 00 f7 d8 64 89 02 b8 ff ff ff ff eb bd e8\n20 ad 01 00 f3 0f 1e fa 80 3d b5 a7 10 00 00 74 13 31 c0 0f 05 <48> 3d\n00 f0 ff ff 77 4f c3 66 0f 1f 44 00 00 55 48 89 e5 48 83 ec\nRSP: 002b:00007ffe87c079d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000\nRAX: ffffffffffffffda RBX: 0000000000040000 RCX: 00007fe271288911\nRDX: 0000000000040000 RSI: 00007fe2633c6000 RDI: 0000000000000003\nRBP: 00007ffe87c07a00 R08: 0000000000000000 R09: 00007fe2713e6380\nR10: 0000000000000022 R11: 0000000000000246 R12: 0000000000040000\nR13: 00007fe2633c6000 R14: 0000000000000003 R15: 0000000000000000\n </TASK>\n\nFix this by setting cifs_server_iface::speed to a sane value (1Gbps)\nby default when link speed is unset."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: corregir oops debido a una velocidad de enlace no establecida No se garantiza que el servidor siempre establezca NETWORK_INTERFACE_INFO::LinkSpeed, por lo que el cliente debe controlar los valores y luego evitar que ocurran oops como el siguiente: Oops: error de división: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 1323 Comm: cat No contaminado 6.13.0-rc7 #2 Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41 04/01/2014 RIP: 0010:cifs_debug_data_proc_show+0xa45/0x1460 [cifs] Código: 00 00 48 89 df e8 3b cd 1b c1 41 f6 44 24 2c 04 0f 84 50 01 00 00 48 89 ef e8 e7 d0 1b c1 49 8b 44 24 18 31 d2 49 8d 7c 24 28 &lt;48&gt; f7 74 24 18 48 89 c3 e8 6e cf 1b c1 41 8b 6c 24 28 49 8d 7c 24 RSP: 0018:ffffc90001817be0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88811230022c RCX: ffffffffc041bd99 RDX: 0000000000000000 RSI: 0000000000000567 RDI: ffff888112300228 RBP: ffff888112300218 R08: fffff52000302f5f R09: ffffed1022fa58ac R10: ffff888117d2c566 R11: 00000000ffffff R12: ffff888112300200 R13: 000000012a15343f R14: 000000000000001 R15: ffff888113f2db58 FS: 00007fe27119e740(0000) GS:ffff888148600000(0000) knlGS:00000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe2633c5000 CR3: 0000000124da0000 CR4: 0000000000750ef0 PKRU: 55555554 Seguimiento de llamadas:  ? __die_body.cold+0x19/0x27 ? die+0x2e/0x50 ? do_trap+0x159/0x1b0 ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs] ? do_error_trap+0x90/0x130 ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs] ? exc_divide_error+0x39/0x50 ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs] ? asm_exc_divide_error+0x1a/0x20 ? cifs_debug_data_proc_show+0xa39/0x1460 [cifs] ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs] ? seq_read_iter+0x42e/0x790 seq_read_iter+0x19a/0x790 proc_reg_read_iter+0xbe/0x110 ? __pfx_proc_reg_read_iter+0x10/0x10 vfs_read+0x469/0x570 ? do_user_addr_fault+0x398/0x760 ? __pfx_vfs_read+0x10/0x10 ? find_held_lock+0x8a/0xa0 ? __pfx_lock_release+0x10/0x10 ksys_read+0xd3/0x170 ? __pfx_ksys_read+0x10/0x10 ? __rcu_read_unlock+0x50/0x270 ? mark_held_locks+0x1a/0x90 do_syscall_64+0xbb/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe271288911 Código: 00 48 8b 15 01 25 10 00 f7 d8 64 89 02 b8 ff ff ff ff eb bd e8 20 ad 01 00 f3 0f 1e fa 80 3d b5 a7 10 00 00 74 13 31 c0 0f 05 &lt;48&gt; 3d 00 f0 ff ff 77 4f c3 66 0f 1f 44 00 00 55 48 89 e5 48 83 ec RSP: 002b:00007ffe87c079d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000040000 RCX: 00007fe271288911 RDX: 0000000000040000 RSI: 00007fe2633c6000 RDI: 0000000000000003 RBP: 00007ffe87c07a00 R08: 0000000000000000 R09: 00007fe2713e6380 R10: 00000000000000022 R11: 0000000000000246 R12: 0000000000040000 R13: 00007fe2633c6000 R14: 0000000000000003 R15: 0000000000000000  Solucione esto configurando cifs_server_iface::speed en un valor razonable (1 Gbps) de manera predeterminada cuando la velocidad del enlace no está configurada."
    }
  ],
  "lastModified": "2026-07-30T06:21:01.947",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F8837718-3D0A-4219-9E72-A6D206F288EB",
              "versionEndExcluding": "6.1.129",
              "versionStartIncluding": "6.1.65"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D1551D06-9A6E-4921-BB63-73919A44CE01",
              "versionEndExcluding": "6.6.76",
              "versionStartIncluding": "6.6.4"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2897389C-A8C3-4D69-90F2-E701B3D66373",
              "versionEndExcluding": "6.12.13",
              "versionStartIncluding": "6.7"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6D4116B1-1BFD-4F23-BA84-169CC05FC5A3",
              "versionEndExcluding": "6.13.2",
              "versionStartIncluding": "6.13"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}