efivarfs: Rate limit statfs() handler (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.21 % · percentile 11 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
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.
References
- https://git.kernel.org/stable/c/97d71ebee48cd1b29091762b3e5cca4f815dd84c
- 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/0dbc2e94b81df5a1264068b6ed3605c654b8afcb
- https://git.kernel.org/stable/c/b2326338dc683e8c1067c0cbf7a47986c4190902
European references
- ENISA EUVD · EUVD-2026-76516
- GCVE · GCVE-0-2026-89604
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1289 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1253 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 115409cbb6a296d73702a62c54c5b1b11cb88b3d < 97d71ebee48cd1b29091762b3e5cca4f815dd84c ; affected d86ff3333cb1d5f42d8898fb5fdb304e143c0237 < 3cd611c9f1dbcc116c8af5112e3c1783c8cde2ae ; affected d86ff3333cb1d5f42d8898fb5fdb304e143c0237 < 8953bdd1b9c0e748d5408d3d0b8e7aeee5c9cd41 ; affected d86ff3333cb1d5f42d8898fb5fdb304e143c0237 < 92895a14329cc9533e2a74a265214f690ba3851a ; affected d86ff3333cb1d5f42d8898fb5fdb304e143c0237 < 0dbc2e94b81df5a1264068b6ed3605c654b8afcb ; affected d86ff3333cb1d5f42d8898fb5fdb304e143c0237 < b2326338dc683e8c1067c0cbf7a47986c4190902 |
| Linux · Linux | affected 6.5 ; unaffected 0 < 6.5 ; unaffected 6.1.188 ≤ 6.1.* ; unaffected 6.6.157 ≤ 6.6.* ; unaffected 6.12.109 ≤ 6.12.* ; unaffected 6.18.50 ≤ 6.18.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |