What happened
In the Linux kernel, the following vulnerability has been resolved: omfs: handle set_blocksize failures omfs uses buffer_heads, which don't handle block size > PAGE_SIZE well. Without this, mounting we will hit the BUG_ON(offset >= folio_size(folio)); in folio_set_bh on the first __bread_gfp call.
Affected versions
Linux: 555e3775ced1d05203934fc6529bbf0560dd8733 through before 61ffc31cd8642d7a950b6831720629c8331365f6 (git); 555e3775ced1d05203934fc6529bbf0560dd8733 through before fd4d6593c51253c79be422d6ae42e318250e20a7 (git); 555e3775ced1d05203934fc6529bbf0560dd8733 through before 18c3d6fcb557f920c9143711497625e70153874c (git); 2.6.27 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.