{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89604","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.733Z","datePublished":"2026-09-11T19:45:07.365Z","dateUpdated":"2026-09-14T12:01:24.587Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-14T12:01:24.587Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nefivarfs: Rate limit statfs() handler\n\nRavi reports that statfs() may be called by unprivileged users on the\nefivarfs mount point, which may result in a flood of calls to the\nQueryVariableInfo() runtime service. These calls are disproportionately\ncostly on x86 systems where the variable store is backed by SMM, as each\nSMM entry requires a rendez-vous of all the CPUs.\n\nSo rate limit the calls to QueryVariableInfo() at twice per second, and\nreturn the most recently obtained value for calls that are elided."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/efivarfs/super.c"],"versions":[{"version":"115409cbb6a296d73702a62c54c5b1b11cb88b3d","lessThan":"97d71ebee48cd1b29091762b3e5cca4f815dd84c","status":"affected","versionType":"git"},{"version":"d86ff3333cb1d5f42d8898fb5fdb304e143c0237","lessThan":"3cd611c9f1dbcc116c8af5112e3c1783c8cde2ae","status":"affected","versionType":"git"},{"version":"d86ff3333cb1d5f42d8898fb5fdb304e143c0237","lessThan":"8953bdd1b9c0e748d5408d3d0b8e7aeee5c9cd41","status":"affected","versionType":"git"},{"version":"d86ff3333cb1d5f42d8898fb5fdb304e143c0237","lessThan":"92895a14329cc9533e2a74a265214f690ba3851a","status":"affected","versionType":"git"},{"version":"d86ff3333cb1d5f42d8898fb5fdb304e143c0237","lessThan":"0dbc2e94b81df5a1264068b6ed3605c654b8afcb","status":"affected","versionType":"git"},{"version":"d86ff3333cb1d5f42d8898fb5fdb304e143c0237","lessThan":"b2326338dc683e8c1067c0cbf7a47986c4190902","status":"affected","versionType":"git"},{"version":"6.1.178","lessThan":"6.1.188","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/efivarfs/super.c"],"versions":[{"version":"6.5","status":"affected"},{"version":"0","lessThan":"6.5","status":"unaffected","versionType":"semver"},{"version":"6.1.188","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.109","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.50","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.4","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.178","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.12.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/97d71ebee48cd1b29091762b3e5cca4f815dd84c"},{"url":"https://git.kernel.org/stable/c/3cd611c9f1dbcc116c8af5112e3c1783c8cde2ae"},{"url":"https://git.kernel.org/stable/c/8953bdd1b9c0e748d5408d3d0b8e7aeee5c9cd41"},{"url":"https://git.kernel.org/stable/c/92895a14329cc9533e2a74a265214f690ba3851a"},{"url":"https://git.kernel.org/stable/c/0dbc2e94b81df5a1264068b6ed3605c654b8afcb"},{"url":"https://git.kernel.org/stable/c/b2326338dc683e8c1067c0cbf7a47986c4190902"}],"title":"efivarfs: Rate limit statfs() handler","x_generator":{"engine":"bippy-1.2.0"}}}}