CVE-2025-71291
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2025-71291
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2025-71291.html
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/ece3722169ba93734bfd1f06255e8ab7f19fe964
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/ba75ecb97d3f4e95d59002c13afb6519205be6cb
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/aa97ccc3dc1eba9f4537f0410e9dbb0b05ccf2fb
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/741c5a3a0cd893a4218fc0fc8c18403e54fcfb22
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/3842f93e6e29d5cc1dcb9e5bda70587b444bed69
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/20f2d9dbe5e972516f8f9948d7ae5b95d1ad77bd
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 6.1.170-1 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 6.19.6-1 |
| debian | sid | fixed | 6.19.6-1 |
| debian | trixie | fixed | 6.12.85-1 |
| linux-kernel | affected | 6.1.165 |
References
- https://git.kernel.org/stable/c/20f2d9dbe5e972516f8f9948d7ae5b95d1ad77bd
- https://git.kernel.org/stable/c/3842f93e6e29d5cc1dcb9e5bda70587b444bed69
- https://git.kernel.org/stable/c/741c5a3a0cd893a4218fc0fc8c18403e54fcfb22
- https://git.kernel.org/stable/c/aa97ccc3dc1eba9f4537f0410e9dbb0b05ccf2fb
- https://git.kernel.org/stable/c/ba75ecb97d3f4e95d59002c13afb6519205be6cb
- https://git.kernel.org/stable/c/ece3722169ba93734bfd1f06255e8ab7f19fe964
- https://www.suse.com/security/cve/CVE-2025-71291.html
- https://security-tracker.debian.org/tracker/CVE-2025-71291
CWEs
CWE-476
Verify integrity in audit chain (admin only). AS-IS.