Description
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.
Affected products
linux: linux kernel
References6
- git.kernel.org/stable/c/20f2d9dbe5e972516f8f9948d7ae5b95d1ad77bd Patch
- git.kernel.org/stable/c/3842f93e6e29d5cc1dcb9e5bda70587b444bed69 Patch
- git.kernel.org/stable/c/741c5a3a0cd893a4218fc0fc8c18403e54fcfb22 Patch
- git.kernel.org/stable/c/aa97ccc3dc1eba9f4537f0410e9dbb0b05ccf2fb Patch
- git.kernel.org/stable/c/ba75ecb97d3f4e95d59002c13afb6519205be6cb Patch
- git.kernel.org/stable/c/ece3722169ba93734bfd1f06255e8ab7f19fe964 Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 13 November 2026
- CWE
- CWE-476
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.