CVE-2026-90419

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

State: Published
Severity: 7.1 High
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

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]

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 16df2520502867a4f34e202b89d01243d59bb8b5Affected 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before dcc85fc28f884038735464f6f104dda9c7dbfad6Affected 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 5b69ebe20d7f944c1f45177dca0c11474ac277ccAffected 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 7029e70cf86d5c54c0a2812479b0bee2cabcbaaaAffected 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 71bd64471ff583101b4a33dfc838ce29aef57960Affected 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 842397fdfd2e61d6470166c796f3125b6c27a162Affected 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 15c8559376416a84c3d8402fd8d0c89bb323d05fAffected 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 7cb2f76a6a2ba2130b577cb8ac13e1e46c4fc689Affected
LinuxLinux	2.6.30Affected before 2.6.30Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 16df2520502867a4f34e202b89d01243d59bb8b5Affected
8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before dcc85fc28f884038735464f6f104dda9c7dbfad6Affected
8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 5b69ebe20d7f944c1f45177dca0c11474ac277ccAffected
8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 7029e70cf86d5c54c0a2812479b0bee2cabcbaaaAffected
8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 71bd64471ff583101b4a33dfc838ce29aef57960Affected
8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 842397fdfd2e61d6470166c796f3125b6c27a162Affected
8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 15c8559376416a84c3d8402fd8d0c89bb323d05fAffected
8a9d2191e9f43bbcd256a9a6871bd73434c83f2f to before 7cb2f76a6a2ba2130b577cb8ac13e1e46c4fc689Affected

LinuxLinux

2.6.30Affected
before 2.6.30Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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