CVE-2026-46329: erofs: handle end of filesystem properly for file-backed mounts

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-09 · updated 2026-07-23

Description

In the Linux kernel, the following vulnerability has been resolved: erofs: handle end of filesystem properly for file-backed mounts I/O requests beyond the end of the filesystem should be zeroed out, similar to loopback devices and that is what we expect.

Affected products

Linux kernel: from 6.12 before 6.12.75; from 6.13 before 6.18.14; from 6.19 before 6.19.4 — fixed in 6.12.75, 6.18.14, 6.19.4

How to fix

Upgrade to a fixed version: Linux kernel 6.12.75, 6.18.14, 6.19.4. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/8d582d65d20bb4796db01b19e86909ad68cb337b
https://git.kernel.org/stable/c/bc804a8d7e865ef47fb7edcaf5e77d18bf444ebc
https://git.kernel.org/stable/c/e49abde0ffc382a967b24f326d1614ac3bb06a94
https://git.kernel.org/stable/c/fe4039034dcdf584afbf763787909e28e92a4927

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