What happened
In the Linux kernel, the following vulnerability has been resolved: qnx4: handle set_blocksize failures qnx4 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 aac97a4b3f47c36a47f934aa679407b718b67537 (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before 60f7ccf669882262330171eda51a4f52fa2e69c9 (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before c7d911ea1cc9a63b07e52f5e75b263be0615b289 (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.