CVE-2022-49515

Estado: AnalizadaAlta (7.1)—

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

ASoC: cs35l41: Fix an out-of-bounds access in otp_packed_element_t

The CS35L41_NUM_OTP_ELEM is 100, but only 99 entries are defined in the array otp_map_1/2[CS35L41_NUM_OTP_ELEM], this will trigger UBSAN to report a shift-out-of-bounds warning in the cs35l41_otp_unpack() since the last entry in the array will result in GENMASK(-1, 0).

Detalles técnicos trazas, registros y código del informe original

UBSAN reports this problem:
 UBSAN: shift-out-of-bounds in /home/hwang4/build/jammy/jammy/sound/soc/codecs/cs35l41-lib.c:836:8
 shift exponent 64 is too large for 64-bit type 'long unsigned int'
 CPU: 10 PID: 595 Comm: systemd-udevd Not tainted 5.15.0-23-generic #23
 Hardware name: LENOVO \x02MFG_IN_GO/\x02MFG_IN_GO, BIOS N3GET19W (1.00 ) 03/11/2022
 Call Trace:
  <TASK>
  show_stack+0x52/0x58
  dump_stack_lvl+0x4a/0x5f
  dump_stack+0x10/0x12
  ubsan_epilogue+0x9/0x45
  __ubsan_handle_shift_out_of_bounds.cold+0x61/0xef
  ? regmap_unlock_mutex+0xe/0x10
  cs35l41_otp_unpack.cold+0x1c6/0x2b2 [snd_soc_cs35l41_lib]
  cs35l41_hda_probe+0x24f/0x33a [snd_hda_scodec_cs35l41]
  cs35l41_hda_i2c_probe+0x65/0x90 [snd_hda_scodec_cs35l41_i2c]
  ? cs35l41_hda_i2c_remove+0x20/0x20 [snd_hda_scodec_cs35l41_i2c]
  i2c_device_probe+0x252/0x2b0

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Puntuación base: 7.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.27%
Percentil entre todas las CVEs puntuadas: 17
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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation75 %
Impacto principalT1059 Command and Scripting Interpreterexecution45 %
Impacto secundarioT1499.004 Application or System Exploitationimpact60 %

Acceso local (AV:L) sin interacción con privilegios limitados (PR:L) → T1068. Out-of-bounds en kernel puede causar ejecución de código (T1059) o DoS (T1499.004); la confianza es moderada por ser bug de lectura sin control de explotación explícito.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Filter Network Traffic

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-125

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2022-49515",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
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        "source": "nvd@nist.gov",
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          "version": "3.1",
          "baseScore": 7.1,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
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  "published": "2025-02-26T07:01:27.567",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "tags": [
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      "description": [
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          "value": "CWE-125"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: cs35l41: Fix an out-of-bounds access in otp_packed_element_t\n\nThe CS35L41_NUM_OTP_ELEM is 100, but only 99 entries are defined in\nthe array otp_map_1/2[CS35L41_NUM_OTP_ELEM], this will trigger UBSAN\nto report a shift-out-of-bounds warning in the cs35l41_otp_unpack()\nsince the last entry in the array will result in GENMASK(-1, 0).\n\nUBSAN reports this problem:\n UBSAN: shift-out-of-bounds in /home/hwang4/build/jammy/jammy/sound/soc/codecs/cs35l41-lib.c:836:8\n shift exponent 64 is too large for 64-bit type 'long unsigned int'\n CPU: 10 PID: 595 Comm: systemd-udevd Not tainted 5.15.0-23-generic #23\n Hardware name: LENOVO \\x02MFG_IN_GO/\\x02MFG_IN_GO, BIOS N3GET19W (1.00 ) 03/11/2022\n Call Trace:\n  <TASK>\n  show_stack+0x52/0x58\n  dump_stack_lvl+0x4a/0x5f\n  dump_stack+0x10/0x12\n  ubsan_epilogue+0x9/0x45\n  __ubsan_handle_shift_out_of_bounds.cold+0x61/0xef\n  ? regmap_unlock_mutex+0xe/0x10\n  cs35l41_otp_unpack.cold+0x1c6/0x2b2 [snd_soc_cs35l41_lib]\n  cs35l41_hda_probe+0x24f/0x33a [snd_hda_scodec_cs35l41]\n  cs35l41_hda_i2c_probe+0x65/0x90 [snd_hda_scodec_cs35l41_i2c]\n  ? cs35l41_hda_i2c_remove+0x20/0x20 [snd_hda_scodec_cs35l41_i2c]\n  i2c_device_probe+0x252/0x2b0"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ASoC: cs35l41: Se corrige un acceso fuera de los límites en otp_packed_element_t. CS35L41_NUM_OTP_ELEM es 100, pero solo se definen 99 entradas en la matriz otp_map_1/2[CS35L41_NUM_OTP_ELEM], esto hará que UBSAN informe una advertencia de cambio fuera de los límites en cs35l41_otp_unpack() ya que la última entrada en la matriz dará como resultado GENMASK(-1, 0). UBSAN informa este problema: UBSAN: cambio fuera de los límites en /home/hwang4/build/jammy/jammy/sound/soc/codecs/cs35l41-lib.c:836:8 El exponente de cambio 64 es demasiado grande para el tipo de 64 bits 'long unsigned int' CPU: 10 PID: 595 Comm: systemd-udevd No contaminado 5.15.0-23-generic #23 Nombre del hardware: LENOVO \\x02MFG_IN_GO/\\x02MFG_IN_GO, BIOS N3GET19W (1.00) 03/11/2022 Seguimiento de llamadas:  show_stack+0x52/0x58 dump_stack_lvl+0x4a/0x5f dump_stack+0x10/0x12 cs35l41_hda_i2c_probe+0x65/0x90 [snd_hda_scodec_cs35l41_i2c] ? cs35l41_hda_i2c_remove+0x20/0x20 [snd_hda_scodec_cs35l41_i2c] sonda de dispositivo i2c+0x252/0x2b0"
    }
  ],
  "lastModified": "2026-06-17T05:18:17.810",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "15E2DD33-2255-4B76-9C15-04FF8CBAB252",
              "versionEndExcluding": "5.17.14",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8E122216-2E9E-4B3E-B7B8-D575A45BA3C2",
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          "operator": "OR"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}