CVE-2026-89604
CVE CVE-2026-89604EUVD EUVD-2026-76516Published 2026-09-11T19:45:07.000ZLast changed 2026-09-14T12:01:24.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 6.6.157; 115409cbb6a296d73702a62c54c5b1b11cb88b3d <97d71ebee48cd1b29091762b3e5cca4f815dd84c; patch: 6.1.188; patch: 7.3-rc1; d86ff3333cb1d5f42d8898fb5fdb304e143c0237 <8953bdd1b9c0e748d5408d3d0b8e7aeee5c9cd41; patch: 0; d86ff3333cb1d5f42d8898fb5fdb304e143c0237 <b2326338dc683e8c1067c0cbf7a47986c4190902; d86ff3333cb1d5f42d8898fb5fdb304e143c0237 <3cd611c9f1dbcc116c8af5112e3c1783c8cde2ae; 6.1.178 <6.1.188; patch: 6.12.109; d86ff3333cb1d5f42d8898fb5fdb304e143c0237 <0dbc2e94b81df5a1264068b6ed3605c654b8afcb; patch: 6.18.50; d86ff3333cb1d5f42d8898fb5fdb304e143c0237 <92895a14329cc9533e2a74a265214f690ba3851a; patch: 7.2.4; 6.5
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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