CVE-2025-71291 (GCVE-0-2025-71291)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:32 – Updated: 2026-05-11 21:57
VLAI
Title
misc: bcm_vk: Fix possible null-pointer dereferences in bcm_vk_read()
Summary
In the Linux kernel, the following vulnerability has been resolved: misc: bcm_vk: Fix possible null-pointer dereferences in bcm_vk_read() In the function bcm_vk_read(), the pointer entry is checked, indicating that it can be NULL. If entry is NULL and rc is set to -EMSGSIZE, the following code may cause null-pointer dereferences: struct vk_msg_blk tmp_msg = entry->to_h_msg[0]; set_msg_id(&tmp_msg, entry->usr_msg_id); tmp_msg.size = entry->to_h_blks - 1; To prevent these possible null-pointer dereferences, copy to_h_msg, usr_msg_id, and to_h_blks from iter into temporary variables, and return these temporary variables to the application instead of accessing them through a potentially NULL entry.
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 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 , < 741c5a3a0cd893a4218fc0fc8c18403e54fcfb22 (git)
Affected: 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 , < ece3722169ba93734bfd1f06255e8ab7f19fe964 (git)
Affected: 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 , < aa97ccc3dc1eba9f4537f0410e9dbb0b05ccf2fb (git)
Affected: 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 , < 3842f93e6e29d5cc1dcb9e5bda70587b444bed69 (git)
Affected: 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 , < 20f2d9dbe5e972516f8f9948d7ae5b95d1ad77bd (git)
Affected: 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 , < ba75ecb97d3f4e95d59002c13afb6519205be6cb (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmisc: bcm_vk: Correcci\u00f3n de posibles desreferencias de puntero nulo en bcm_vk_read()\n\nEn la funci\u00f3n bcm_vk_read(), el puntero entry es verificado, indicando que puede ser NULL. Si entry es NULL y rc se establece en -EMSGSIZE, el siguiente c\u00f3digo puede causar desreferencias de puntero nulo:\n\n  struct vk_msg_blk tmp_msg = entry -\u003e to_h_msg[0];\n  set_msg_id(\u0026tmp_msg, entry -\u003e usr_msg_id);\n  tmp_msg.size = entry -\u003e to_h_blks - 1;\n\nPara prevenir estas posibles desreferencias de puntero nulo, copie to_h_msg, usr_msg_id y to_h_blks de iter a variables temporales, y devuelva estas variables temporales a la aplicaci\u00f3n en lugar de acceder a ellas a trav\u00e9s de un entry potencialmente NULL."
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                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
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        "vulnStatus": "Analyzed",
        "weaknesses": [
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                "value": "CWE-476"
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:13:13+00:00",
      "cve": "CVE-2025-71291",
      "id": "CVE-2025-71291",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: misc: bcm_vk: Fix possible null-pointer dereferences in bcm_vk_read()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71291.json",
      "version": "3"
    }
  }
}



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