CVE-2026-43123 PUBLISHED

fbcon: check return value of con2fb_acquire_newinfo()

Assigner: Linux
Reserved: 01.05.2026 Published: 06.05.2026 Updated: 06.05.2026

In the Linux kernel, the following vulnerability has been resolved:

fbcon: check return value of con2fb_acquire_newinfo()

If fbcon_open() fails when called from con2fb_acquire_newinfo() then info->fbcon_par pointer remains NULL which is later dereferenced.

Add check for return value of the function con2fb_acquire_newinfo() to avoid it.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e to d3e535533767c85788529e626478718b7e95a59f (excl.)
  • affected from d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e to 3b5a754ec86bc6064af9aca76eb191c2405e6b0c (excl.)
  • affected from d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e to a785c4e2a999c2d51dfcf40d317cfb30cc735d2c (excl.)
  • affected from d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e to 0b038c0be6827dd2dbb1ce4f8d92d97c80cbe9cc (excl.)
  • affected from d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e to 11a93180a70bb3095a9bd80d113d9277e30d9959 (excl.)
  • affected from d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e to f57b61624c86ef8f87f6e6b7dd0755de03d90e89 (excl.)
  • affected from d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e to 011a0502801c8536f64141a2b61362c14f456544 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 2.6.23 is affected
  • unaffected from 0 to 2.6.23 (excl.)
  • unaffected from 5.15.203 to 5.15.* (incl.)
  • unaffected from 6.1.165 to 6.1.* (incl.)
  • unaffected from 6.6.128 to 6.6.* (incl.)
  • unaffected from 6.12.75 to 6.12.* (incl.)
  • unaffected from 6.18.16 to 6.18.* (incl.)
  • unaffected from 6.19.6 to 6.19.* (incl.)
  • unaffected from 7.0 to * (incl.)

References