CVE-2026-90161

erofs: fix interlaced ztailpacking pclusters

HIGH
7.1
CVSS Score
Published: September 17, 2026 at 04:06 PM UTC
Updated: October 21, 2026 at 01:20 PM UTC
1 product affected across 1 vendorLinux Kernel

Using Linux by Linux?

Get instant alerts when new vulnerabilities affect Linux - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH7.1
Exploit prediction
EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.0.166.17d6ef8277e44c22f894d54d26ddb36c22d60712dfdffc091e6f94602558bba712b51bc16f79fd6d5
Vendor states this is fixed in 451027c642e752420e1a04237db9ce7b35cee595 (fixed)
Vendor states this is fixed in 862427ebb81d1f6abbf74d799790e1694b37b187 (fixed)
Vendor states this is fixed in ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054 (fixed)
Vendor states this is fixed in 6.1 (unaffected)
Vendor states this is fixed in 6.12.114 (unaffected)
Vendor states this is fixed in 6.18.52 (unaffected)
Vendor states this is fixed in 6.6.160 (unaffected)
Vendor states this is fixed in 7.2.6 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

CVSS

7.1HIGHLinux
Vector?

Quick Info

StatusRECEIVED

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card