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CVE-2025-71230: hfs: ensure sb->s_fs_info is always cleaned up

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-18 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: hfs: ensure sb->s_fs_info is always cleaned up When hfs was converted to the new mount api a bug was introduced by changing the allocation pattern of sb->s_fs_info. If setup_bdev_super() fails after a new superblock has been allocated by sget_fc(), but before hfs_fill_super() takes ownership of the filesystem-specific s_fs_info data it was leaked. Fix this by freeing sb->s_fs_info in hfs_kill_super().

Affected products

• Linux kernel: from 6.13 before 6.18.11; from 6.19 before 6.19.1 — fixed in 6.18.11, 6.19.1

How to fix

Upgrade to a fixed version: Linux kernel 6.18.11, 6.19.1. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/05ce49a902be15dc93854cbfc20161205a9ee446
• https://git.kernel.org/stable/c/399219831514126bc9541e8eadefe02c6fbd9166
• https://git.kernel.org/stable/c/46c1d56ad321fb024761abd9af61a0cb616cf2f6

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