CVE-2026-89604

In the Linux kernel, the following vulnerability has been resolved: efivarfs: Rate limit statfs() handler Ravi reports that statfs() may be called by unprivileged users on the efivarfs mount point, which may result in a flood of calls to the QueryVariableInfo() runtime service. These calls are disproportionately costly on x86 systems where the variable store is backed by SMM, as each SMM entry requires a rendez-vous of all the CPUs. So rate limit the calls to QueryVariableInfo() at twice per second, and return the most recently obtained value for calls that are elided.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/0dbc2e94b81df5a1264068b6ed3605c654b8afcb
https://git.kernel.org/stable/c/3cd611c9f1dbcc116c8af5112e3c1783c8cde2ae
https://git.kernel.org/stable/c/8953bdd1b9c0e748d5408d3d0b8e7aeee5c9cd41
https://git.kernel.org/stable/c/92895a14329cc9533e2a74a265214f690ba3851a
https://git.kernel.org/stable/c/97d71ebee48cd1b29091762b3e5cca4f815dd84c
https://git.kernel.org/stable/c/b2326338dc683e8c1067c0cbf7a47986c4190902

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-11 20:19

Updated : 2026-09-14 13:19

NVD link : CVE-2026-89604

Mitre link : CVE-2026-89604

CVE.ORG link : CVE-2026-89604

JSON object : View

Products Affected

No product.

CWE

No CWE.

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