CVE-2026-43209
minix: Add required sanity checking to minix_check_superblock()
In the Linux kernel, the following vulnerability has been resolved:
minix: Add required sanity checking to minix_check_superblock()
The fs/minix implementation of the minix filesystem does not currently
support any other value for s_log_zone_size than 0. This is also the
only value supported in util-linux; see mkfs.minix.c line 511. In
addition, this patch adds some sanity checking for the other minix
superblock fields, and moves the minix_blocks_needed() checks for the
zmap and imap also to minix_check_super_block().
This also closes a related syzbot bug report.
Affected products
Linux · LinuxWant to know if your infrastructure is exposed to this?
Talk to TrueHacking →References
https://git.kernel.org/stable/c/1efc128ee4adbc23e082715425ff895449d233bchttps://git.kernel.org/stable/c/2bb588cede1c1969e49c0a2822c8cb8b346b7682https://git.kernel.org/stable/c/31fefc18096cdc5549cfa54964d90e0b3229aedchttps://git.kernel.org/stable/c/66c7c239c65341f99ae388d4d53dc9df2bcb9925https://git.kernel.org/stable/c/8c97a6ddc95690a938ded44b4e3202f03f15078chttps://git.kernel.org/stable/c/a051ecf5c5b0387840dc210413ed3bc7fbdaa69chttps://git.kernel.org/stable/c/d791c544efd6b9c944b43cf7f502e5bcb02fb941https://git.kernel.org/stable/c/f57ccd4657c7f082dc47e5b9e18a883bb5f9118f