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CVE-2026-90161NVD

Vulnerability Summary

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.
Severity Level
HIGH(7.1)
Published Date
Sep 17, 2026
Last Modified
Sep 18, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.17%Probability
Root Weakness (CWE)
N/A
CVSS v3.1 Base Metrics — Score 7.1 (HIGH)
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Linux Linux >= fdffc091e6f94602558bba712b51bc16f79fd6d5 and < ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054
  • Linux Linux >= fdffc091e6f94602558bba712b51bc16f79fd6d5 and < 451027c642e752420e1a04237db9ce7b35cee595
  • Linux Linux >= fdffc091e6f94602558bba712b51bc16f79fd6d5 and < 862427ebb81d1f6abbf74d799790e1694b37b187
  • Linux Linux >= 7d6ef8277e44c22f894d54d26ddb36c22d60712d
  • Linux Linux >= 6.0.16 and < 6.1
  • Linux Linux >= 6.1
Patched Versions
  • Linux Linux ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054
  • Linux Linux 451027c642e752420e1a04237db9ce7b35cee595
  • Linux Linux 862427ebb81d1f6abbf74d799790e1694b37b187
  • Linux Linux 6.1
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