CVE-2026-43209

minix: Add required sanity checking to minix_check_superblock()

MEDIUM

5.5

CVSS Score

Published: May 6, 2026 at 11:28 AM UTC

Updated: June 17, 2026 at 10:49 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.12 ≤ v < 5.10.2522.6.12 ≤ v < 5.15.2022.6.12 ≤ v < 6.1.1652.6.12 ≤ v < 6.12.752.6.12 ≤ v < 6.18.162.6.12 ≤ v < 6.19.62.6.12 ≤ v < 6.6.1282.6.12 ≤ v < 7.02.6.12.1 ≤ v < 5.10.2525.11 ≤ v < 5.15.2025.16 ≤ v < 6.1.1656.13 ≤ v < 6.18.166.19 ≤ v < 6.19.66.2 ≤ v < 6.6.1286.7 ≤ v < 6.12.751da177e4c3f41524e886b7f1b8a0c1fc7321cac2 2.6.12 2.6.12 rc2 2.6.12 rc3 2.6.12 rc4 2.6.12 rc5 2.6.12 rc6

Vendor states this is fixed in 1efc128ee4adbc23e082715425ff895449d233bc (fixed)

Vendor states this is fixed in 2bb588cede1c1969e49c0a2822c8cb8b346b7682 (fixed)

Vendor states this is fixed in 31fefc18096cdc5549cfa54964d90e0b3229aedc (fixed)

Vendor states this is fixed in 66c7c239c65341f99ae388d4d53dc9df2bcb9925 (fixed)

Vendor states this is fixed in 8c97a6ddc95690a938ded44b4e3202f03f15078c (fixed)

Vendor states this is fixed in a051ecf5c5b0387840dc210413ed3bc7fbdaa69c (fixed)

Vendor states this is fixed in d791c544efd6b9c944b43cf7f502e5bcb02fb941 (fixed)

Vendor states this is fixed in f57ccd4657c7f082dc47e5b9e18a883bb5f9118f (fixed)

Vendor states this is fixed in 2.6.12 (unaffected)

Vendor states this is fixed in 5.10.252 (unaffected)

Vendor states this is fixed in 5.15.202 (unaffected)

Vendor states this is fixed in 6.1.165 (unaffected)