CVE-2026-43154: erofs: fix incorrect early exits in volume label handling

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: 2026-05-06 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: erofs: fix incorrect early exits in volume label handling Crafted EROFS images containing valid volume labels can trigger incorrect early returns, leading to folio reference leaks. However, this does not cause system crashes or other severe issues.

Affected products

Linux kernel: from 6.18 before 6.18.16; from 6.19 before 6.19.6 — fixed in 6.18.16, 6.19.6

How to fix

Upgrade to a fixed version: Linux kernel 6.18.16, 6.19.6. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/3afa4da38802a4cba1c23848a32284e7e57b831b
https://git.kernel.org/stable/c/8d8a878ef60801d867119b3df6a93e2982d62a71
https://git.kernel.org/stable/c/d498bd168494ad4a4bce16192bfb9ce04ca19c9a

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