erofs: fix interlaced ztailpacking pclusters

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-90161
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:09 UTC
Updated2026-09-18 18:17:44 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

EPSS: 0.001670000 probability, percentile 0.063890000 (date 2026-09-21)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected fdffc091e6f94602558bba712b51bc16f79fd6d5 ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054 git Not specified
CNA Linux Linux affected fdffc091e6f94602558bba712b51bc16f79fd6d5 451027c642e752420e1a04237db9ce7b35cee595 git Not specified
CNA Linux Linux affected fdffc091e6f94602558bba712b51bc16f79fd6d5 862427ebb81d1f6abbf74d799790e1694b37b187 git Not specified
CNA Linux Linux affected 7d6ef8277e44c22f894d54d26ddb36c22d60712d git Not specified
CNA Linux Linux affected 6.0.16 6.1 semver Not specified
CNA Linux Linux affected 6.1 Not specified
CNA Linux Linux unaffected 6.1 semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/451027c642e752420e1a04237db9ce7b35cee595 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/862427ebb81d1f6abbf74d799790e1694b37b187 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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