What’s Vulnerable › Vulnerabilities

CVE-2026-90419: nilfs2: prevent out-of-bounds read in super root block parsing

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: nilfs2: prevent out-of-bounds read in super root block parsing super-root inode metadata size is trusted before nilfs_read_inode_common(). Reject super-root inode sizes whose computed on-disk footprint exceeds the filesystem block size. This prevents malformed filesystem images from making nilfs_read_inode_common() read past the end of the super-root block. [ryusuke: clarify the commit title]

Affected products

• Linux kernel: 2.6.30 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/15c8559376416a84c3d8402fd8d0c89bb323d05f
• https://git.kernel.org/stable/c/16df2520502867a4f34e202b89d01243d59bb8b5
• https://git.kernel.org/stable/c/5b69ebe20d7f944c1f45177dca0c11474ac277cc
• https://git.kernel.org/stable/c/7029e70cf86d5c54c0a2812479b0bee2cabcbaaa
• https://git.kernel.org/stable/c/71bd64471ff583101b4a33dfc838ce29aef57960
• https://git.kernel.org/stable/c/7cb2f76a6a2ba2130b577cb8ac13e1e46c4fc689
• https://git.kernel.org/stable/c/842397fdfd2e61d6470166c796f3125b6c27a162
• https://git.kernel.org/stable/c/dcc85fc28f884038735464f6f104dda9c7dbfad6

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