What happened
In the Linux kernel, the following vulnerability has been resolved: hpfs: handle set_blocksize failures hpfs 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 fc79fcc78cb771f2a803e52149cac5ca9050fd05 (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before f27e21cf3c0446a3536ea9b588a78a46b0a2cb66 (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before a405996f23e04942aad064ab8d50c55827482872 (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.