CVE-2026-90161

erofs: fix interlaced ztailpacking pclusters

State: Published
Severity: 7.1 High
Published: Sep 17, 2026
Updated: Oct 30, 2026
Reserved: Sep 11, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

erofs: fix interlaced ztailpacking pclusters

On-disk sizes of interlaced pclusters should be block-aligned, and ztailpacking interlaced pclusters should be invalid at all.

Currently, mkfs.erofs won't generate any interlaced pcluster with ztailpacking enabled, so this doesn't affect any existing valid filesystems.

However, crafted images can contain invalid interlaced ztailpacking pclusters, resulting in an out-of-bounds read from a kmap'd page and copying irrelevant kernel memory into userspace-visible page cache.

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	fdffc091e6f94602558bba712b51bc16f79fd6d5 to before b634286a8628155557a4f473a9dbab18bb439a7bAffected fdffc091e6f94602558bba712b51bc16f79fd6d5 to before 795dca34a41545d377d19bc492b10bc789772410Affected fdffc091e6f94602558bba712b51bc16f79fd6d5 to before cd59f91cbc1e715cb5dc65773ee22123d70cb8f2Affected fdffc091e6f94602558bba712b51bc16f79fd6d5 to before ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054Affected fdffc091e6f94602558bba712b51bc16f79fd6d5 to before 451027c642e752420e1a04237db9ce7b35cee595Affected fdffc091e6f94602558bba712b51bc16f79fd6d5 to before 862427ebb81d1f6abbf74d799790e1694b37b187Affected 7d6ef8277e44c22f894d54d26ddb36c22d60712dAffected 6.0.16 to before 6.1Affected
LinuxLinux	6.1Affected before 6.1Not affected 6.1.191 through 6.1.Not affected 6.6.160 through 6.6.Not affected 6.12.114 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

fdffc091e6f94602558bba712b51bc16f79fd6d5 to before b634286a8628155557a4f473a9dbab18bb439a7bAffected
fdffc091e6f94602558bba712b51bc16f79fd6d5 to before 795dca34a41545d377d19bc492b10bc789772410Affected
fdffc091e6f94602558bba712b51bc16f79fd6d5 to before cd59f91cbc1e715cb5dc65773ee22123d70cb8f2Affected
fdffc091e6f94602558bba712b51bc16f79fd6d5 to before ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054Affected
fdffc091e6f94602558bba712b51bc16f79fd6d5 to before 451027c642e752420e1a04237db9ce7b35cee595Affected
fdffc091e6f94602558bba712b51bc16f79fd6d5 to before 862427ebb81d1f6abbf74d799790e1694b37b187Affected
7d6ef8277e44c22f894d54d26ddb36c22d60712dAffected
6.0.16 to before 6.1Affected

LinuxLinux

6.1Affected
before 6.1Not affected
6.1.191 through 6.1.*Not affected
6.6.160 through 6.6.*Not affected
6.12.114 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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