CVE-2026-90161 Linux Kernel - Information Disclosure

Linux kernel contains an out-of-bounds read vulnerability caused by invalid interlaced ztailpacking pclusters in erofs filesystem, letting attackers with crafted images read kernel memory, exploit requires crafted filesystem images.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.18% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Information Disclosure
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version with the erofs ztailpacking fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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