High 7.1Published Sep 17, 2026

CVE-2026-90161erofs: fix interlaced ztailpacking pclusters

Updated under an hour ago (Oct 27, 2026, 8:00 AM ET)

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Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from fdffc091e6f94602558bba712b51bc16f79fd6d5 before 795dca34a41545d377d19bc492b10bc789772410; from fdffc091e6f94602558bba712b51bc16f79fd6d5 before cd59f91cbc1e715cb5dc65773ee22123d70cb8f2; from fdffc091e6f94602558bba712b51bc16f79fd6d5 before ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054; from fdffc091e6f94602558bba712b51bc16f79fd6d5 before 451027c642e752420e1a04237db9ce7b35cee595; from fdffc091e6f94602558bba712b51bc16f79fd6d5 before 862427ebb81d1f6abbf74d799790e1694b37b187; 7d6ef8277e44c22f894d54d26ddb36c22d60712d; from 6.0.16 before 6.1	CNA record

References

References

https://git.kernel.org/stable/c/795dca34a41545d377d19bc492b10bc789772410
https://git.kernel.org/stable/c/cd59f91cbc1e715cb5dc65773ee22123d70cb8f2
https://git.kernel.org/stable/c/ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054
https://git.kernel.org/stable/c/451027c642e752420e1a04237db9ce7b35cee595
https://git.kernel.org/stable/c/862427ebb81d1f6abbf74d799790e1694b37b187

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.