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CVE-2025-38694

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: media: dvb-frontends: dib7090p: fix null-ptr-deref in dib7090p_rw_on_apb() In dib7090p_rw_on_apb, msg is controlled by user. When msg[0].buf is null and msg[0].len is zero, former checks on msg[0].buf would be passed. If accessing msg[0].buf[2] without sanity check, null pointer deref would happen. We add check on msg[0].len to prevent crash. Similar issue occurs when access msg[1].buf[0] and msg[1].buf[1]. Similar commit: commit 0ed554fd769a ("media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()")

Severity
MEDIUM
CVSS score
5.5 (v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-04 16:15:37.750000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON 
{
  "id": "CVE-2025-38694",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-09-04T16:15:37.750",
  "lastModified": "2026-10-19T21:10:00.160",
  "vulnStatus": "Modified",
  "cveTags": [],
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    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-frontends: dib7090p: fix null-ptr-deref in dib7090p_rw_on_apb()\n\nIn dib7090p_rw_on_apb, msg is controlled by user. When msg[0].buf is null and\nmsg[0].len is zero, former checks on msg[0].buf would be passed. If accessing\nmsg[0].buf[2] without sanity check, null pointer deref would happen. We add\ncheck on msg[0].len to prevent crash. Similar issue occurs when access\nmsg[1].buf[0] and msg[1].buf[1].\n\nSimilar commit: commit 0ed554fd769a (\"media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()\")"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmedia: dvb-frontends: dib7090p: corrección de desreferencia de puntero nulo en dib7090p_rw_on_apb()\n\nEn dib7090p_rw_on_apb, msg es controlado por el usuario. Cuando msg[0].buf es nulo y msg[0].len es cero, las comprobaciones anteriores en msg[0].buf se pasarían. Si se accede a msg[0].buf[2] sin una verificación de validez, ocurriría una desreferencia de puntero nulo. Añadimos una comprobación en msg[0].len para evitar un fallo. Un problema similar ocurre al acceder a msg[1].buf[0] y msg[1].buf[1].\n\nCommit similar: commit 0ed554fd769a ('media: dvb-usb: az6027: corrección de desreferencia de puntero nulo en az6027_i2c_xfer()')"
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          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
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      "description": [
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