{"id":"CVE-2026-97904","state":"PUBLISHED","title":"cpufreq: initialize policy rwsem before sysfs publication","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: initialize policy rwsem before sysfs publication\n\ncpufreq_policy_alloc() initializes policy->rwsem after\nkobject_init_and_add() has created the policy sysfs directory and its\ndefault attributes. A sysfs access can therefore reach a policy callback\nbefore the semaphore has been initialized.\n\nInitialize policy->rwsem before publishing the policy kobject so sysfs\ncallbacks always see an initialized semaphore.","publishedAt":"2026-09-25T10:22:30.444Z","updatedAt":"2026-10-19T09:10:30.506Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"c9d8435814f2ac533c40fe3f35d94235bc3a9443","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"82a54923700da5de83ce2b26c0b43f6b5005c8f1","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"b14987a0f73777644099f47f01aba3b0f9dc6c27","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"b22193eea2ce32c39dda5e09f9c2be2f3fd7eb4a","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"dc11263cb05ed519758fd135fe08d611bad1f241","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"27c9b491bf7604e83b50c3bbfa18a30266ff345f","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"2cee937f779f69b195b37bbec1e888da9bfe9d58","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"3e5d1bf4bd687beb2cb4e32a07af695455925588","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/cpufreq/cpufreq.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.2","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/cpufreq/cpufreq.c"]}],"references":["https://git.kernel.org/stable/c/c9d8435814f2ac533c40fe3f35d94235bc3a9443","https://git.kernel.org/stable/c/82a54923700da5de83ce2b26c0b43f6b5005c8f1","https://git.kernel.org/stable/c/b14987a0f73777644099f47f01aba3b0f9dc6c27","https://git.kernel.org/stable/c/b22193eea2ce32c39dda5e09f9c2be2f3fd7eb4a","https://git.kernel.org/stable/c/dc11263cb05ed519758fd135fe08d611bad1f241","https://git.kernel.org/stable/c/27c9b491bf7604e83b50c3bbfa18a30266ff345f","https://git.kernel.org/stable/c/2cee937f779f69b195b37bbec1e888da9bfe9d58","https://git.kernel.org/stable/c/3e5d1bf4bd687beb2cb4e32a07af695455925588"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/97xxx/CVE-2026-97904.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97904","state":"PUBLISHED","datePublished":"2026-09-25T10:22:30.444Z","dateUpdated":"2026-10-19T09:10:30.506Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:18:58.200Z"},"containers":{"cna":{"title":"cpufreq: initialize policy rwsem before sysfs publication","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: initialize policy rwsem before sysfs publication\n\ncpufreq_policy_alloc() initializes policy->rwsem after\nkobject_init_and_add() has created the policy sysfs directory and its\ndefault attributes. A sysfs access can therefore reach a policy callback\nbefore the semaphore has been initialized.\n\nInitialize policy->rwsem before publishing the policy kobject so sysfs\ncallbacks always see an initialized semaphore."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"c9d8435814f2ac533c40fe3f35d94235bc3a9443","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"82a54923700da5de83ce2b26c0b43f6b5005c8f1","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"b14987a0f73777644099f47f01aba3b0f9dc6c27","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"b22193eea2ce32c39dda5e09f9c2be2f3fd7eb4a","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"dc11263cb05ed519758fd135fe08d611bad1f241","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"27c9b491bf7604e83b50c3bbfa18a30266ff345f","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"2cee937f779f69b195b37bbec1e888da9bfe9d58","versionType":"git"},{"version":"2fc3384dc75bf7333384c7a16d12c796f61c3f56","status":"affected","lessThan":"3e5d1bf4bd687beb2cb4e32a07af695455925588","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/cpufreq/cpufreq.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.2","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/cpufreq/cpufreq.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c9d8435814f2ac533c40fe3f35d94235bc3a9443"},{"url":"https://git.kernel.org/stable/c/82a54923700da5de83ce2b26c0b43f6b5005c8f1"},{"url":"https://git.kernel.org/stable/c/b14987a0f73777644099f47f01aba3b0f9dc6c27"},{"url":"https://git.kernel.org/stable/c/b22193eea2ce32c39dda5e09f9c2be2f3fd7eb4a"},{"url":"https://git.kernel.org/stable/c/dc11263cb05ed519758fd135fe08d611bad1f241"},{"url":"https://git.kernel.org/stable/c/27c9b491bf7604e83b50c3bbfa18a30266ff345f"},{"url":"https://git.kernel.org/stable/c/2cee937f779f69b195b37bbec1e888da9bfe9d58"},{"url":"https://git.kernel.org/stable/c/3e5d1bf4bd687beb2cb4e32a07af695455925588"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:10:30.506Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}