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 ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
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)
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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)
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            "drivers/misc/bcm-vk/bcm_vk_msg.c"
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  }
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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