misc: bcm_vk: Fix possible null-pointer dereferences in bcm_vk_read()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-71291
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-06 12:16:28 UTC
Updated2026-05-13 21:04:54 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-476

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 741c5a3a0cd893a4218fc0fc8c18403e54fcfb22 git Not specified
CNA Linux Linux affected 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 ece3722169ba93734bfd1f06255e8ab7f19fe964 git Not specified
CNA Linux Linux affected 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 aa97ccc3dc1eba9f4537f0410e9dbb0b05ccf2fb git Not specified
CNA Linux Linux affected 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 3842f93e6e29d5cc1dcb9e5bda70587b444bed69 git Not specified
CNA Linux Linux affected 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 20f2d9dbe5e972516f8f9948d7ae5b95d1ad77bd git Not specified
CNA Linux Linux affected 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 ba75ecb97d3f4e95d59002c13afb6519205be6cb git Not specified
CNA Linux Linux affected 5.19 Not specified
CNA Linux Linux unaffected 5.19 semver Not specified
CNA Linux Linux unaffected 6.1.165 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.128 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3842f93e6e29d5cc1dcb9e5bda70587b444bed69 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/20f2d9dbe5e972516f8f9948d7ae5b95d1ad77bd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/aa97ccc3dc1eba9f4537f0410e9dbb0b05ccf2fb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ba75ecb97d3f4e95d59002c13afb6519205be6cb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ece3722169ba93734bfd1f06255e8ab7f19fe964 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/741c5a3a0cd893a4218fc0fc8c18403e54fcfb22 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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