CVE-2024-42257: ext4: use memtostr_pad() for s_volume_name

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-08-08 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: use memtostr_pad() for s_volume_name As with the other strings in struct ext4_super_block, s_volume_name is not NUL terminated. The other strings were marked in commit 072ebb3bffe6 ("ext4: add nonstring annotations to ext4.h"). Using strscpy() isn't the right replacement for strncpy(); it should use memtostr_pad() instead.

Affected products

Linux kernel: from 6.10 before 6.10.1 — fixed in 6.10.1

How to fix

Upgrade to a fixed version: Linux kernel 6.10.1. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/4378be89ddb7de88d984b67ecfd6191686c42817
https://git.kernel.org/stable/c/be27cd64461c45a6088a91a04eba5cd44e1767ef

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