CVE-2026-89604Medium· 5.5▾ SunlitIn 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 …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 4.7
none → medium
— → 4.7
none → medium
— → 4.7
none → medium
4.7 → 5.5
Last analysed / modified upstream
0.2% → 0.2%
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.
Linux >= 115409cbb6a296d73702a62c54c5b1b11cb88b3d < 97d71ebee48cd1b29091762b3e5cca4f815dd84cLinux >= d86ff3333cb1d5f42d8898fb5fdb304e143c0237 < 3cd611c9f1dbcc116c8af5112e3c1783c8cde2aeLinux >= d86ff3333cb1d5f42d8898fb5fdb304e143c0237 < 8953bdd1b9c0e748d5408d3d0b8e7aeee5c9cd41Linux >= d86ff3333cb1d5f42d8898fb5fdb304e143c0237 < 92895a14329cc9533e2a74a265214f690ba3851aLinux >= d86ff3333cb1d5f42d8898fb5fdb304e143c0237 < 0dbc2e94b81df5a1264068b6ed3605c654b8afcbLinux >= d86ff3333cb1d5f42d8898fb5fdb304e143c0237 < b2326338dc683e8c1067c0cbf7a47986c4190902Linux >= 6.1.178 < 6.1.188Linux 6.5Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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