{"id":"CVE-2025-71291","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: bcm_vk: Fix possible null-pointer dereferences in bcm_vk_read()\n\nIn the function bcm_vk_read(), the pointer entry is checked, indicating\nthat it can be NULL","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: bcm_vk: Fix possible null-pointer dereferences in bcm_vk_read()\n\nIn the function bcm_vk_read(), the pointer entry is checked, indicating\nthat it can be NULL. If e…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.19, < 6.1.165","linux_kernel >= 6.2, < 6.6.128","linux_kernel >= 6.7, < 6.12.75","linux_kernel >= 6.13, < 6.18.16","linux_kernel >= 6.19, < 6.19.6"],"patched":["linux_kernel 6.19.6"],"published":"2026-05-06","updated":"2026-10-14","sourceUpdated":"2026-10-14T13:10:00.187","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-71291","references":[{"url":"https://git.kernel.org/stable/c/20f2d9dbe5e972516f8f9948d7ae5b95d1ad77bd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3842f93e6e29d5cc1dcb9e5bda70587b444bed69","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/741c5a3a0cd893a4218fc0fc8c18403e54fcfb22","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/aa97ccc3dc1eba9f4537f0410e9dbb0b05ccf2fb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ba75ecb97d3f4e95d59002c13afb6519205be6cb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ece3722169ba93734bfd1f06255e8ab7f19fe964","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00123,"epssPercentile":0.01835,"ingestedAt":"2026-10-14T13:30:58.487Z","slug":"CVE-2025-71291","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmisc: bcm_vk: Fix possible null-pointer dereferences in bcm_vk_read()\n\nIn the function bcm_vk_read(), the pointer entry is checked, indicating\nthat it can be NULL. If entry is NULL and rc is set to -EMSGSIZE, the\nfollowing code may cause null-pointer dereferences:\n\n  struct vk_msg_blk tmp_msg = entry->to_h_msg[0];\n  set_msg_id(&tmp_msg, entry->usr_msg_id);\n  tmp_msg.size = entry->to_h_blks - 1;\n\nTo prevent these possible null-pointer dereferences, copy to_h_msg,\nusr_msg_id, and to_h_blks from iter into temporary variables, and return\nthese temporary variables to the application instead of accessing them\nthrough a potentially NULL entry.\n\n## Affected\n\n- `linux_kernel >= 5.19, < 6.1.165`\n- `linux_kernel >= 6.2, < 6.6.128`\n- `linux_kernel >= 6.7, < 6.12.75`\n- `linux_kernel >= 6.13, < 6.18.16`\n- `linux_kernel >= 6.19, < 6.19.6`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.19.6`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}