What happened
In the Linux kernel, the following vulnerability has been resolved: bfs: handle set_blocksize failures bfs uses buffer_heads, which don't handle block size > PAGE_SIZE well. Without this, mounting will hit the BUG_ON(offset >= folio_size(folio)); in folio_set_bh on the first __bread_gfp call.
Affected versions
Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before 7cc713b29eecc0189a184e82f42d174fddaa9e1e (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before ab1d6160d26e6ee8939e994999be9b45e90a42ef (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before 2430e3380936df0b648af720cae624eef035a2d1 (git); 2.6.12 Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.