Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 before 741c5a3a0cd893a4218fc0fc8c18403e54fcfb22; affected 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 before ece3722169ba93734bfd1f06255e8ab7f19fe964; affected 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 before aa97ccc3dc1eba9f4537f0410e9dbb0b05ccf2fb; affected 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 before 3842f93e6e29d5cc1dcb9e5bda70587b444bed69; affected 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 before 20f2d9dbe5e972516f8f9948d7ae5b95d1ad77bd; affected 88517757a829e9ce146a6c7233ad5dcdc66fcbb0 before ba75ecb97d3f4e95d59002c13afb6519205be6cb |
| Linux / Linux | affected 5.19; unaffected 0 before 5.19; unaffected 6.1.165 through 6.1.*; unaffected 6.6.128 through 6.6.*; unaffected 6.12.75 through 6.12.*; unaffected 6.18.16 through 6.18.*; unaffected 6.19.6 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/741c5a3a0cd893a4218fc0fc8c18403e54fcfb22
- https://git.kernel.org/stable/c/ece3722169ba93734bfd1f06255e8ab7f19fe964
- https://git.kernel.org/stable/c/aa97ccc3dc1eba9f4537f0410e9dbb0b05ccf2fb
- https://git.kernel.org/stable/c/3842f93e6e29d5cc1dcb9e5bda70587b444bed69
- https://git.kernel.org/stable/c/20f2d9dbe5e972516f8f9948d7ae5b95d1ad77bd
- https://git.kernel.org/stable/c/ba75ecb97d3f4e95d59002c13afb6519205be6cb