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CVE-2026-31451 ext4: replace BUG_ON with proper error handling in ext4_read_inline_folio

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: replace BUG_ON with proper error handling in ext4_read_inline_folio Replace BUG_ON() with proper error handling when inline data size exceeds PAGE_SIZE. This prevents kernel panic and allows the system to continue running while properly reporting the filesystem corruption. The error is logged via ext4_error_inode(), the buffer head is released to prevent memory leak, and -EFSCORRUPTED is returned to indicate filesystem corruption.

Affected products and versions

Product Affected versions Fixed in
Linux 7.0 earliest → < 7.0 7.0
Linux 6.19 earliest → < 6.19.11 6.19.11
Linux 6.18 earliest → < 6.18.21 6.18.21
Linux 6.12 earliest → < 6.12.80 6.12.80
Linux 6.6 earliest → < 6.6.131 6.6.131
Linux 6.1 earliest → < 6.1.177 6.1.177
Linux 5.15 earliest → < 5.15.211 5.15.211
Linux 5.10 earliest → < 5.10.260 5.10.260
Linux 3.8 No fix stated
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Product Affected versions Fixed in
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Versions not published
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