{"id":"CVE-2025-40194","state":"PUBLISHED","title":"cpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request()\n\nThe cpufreq_cpu_put() call in update_qos_request() takes place too early\nbecause the latter subsequently calls freq_qos_update_request() that\nindirectly accesses the policy object in question through the QoS request\nobject passed to it.\n\nFortunately, update_qos_request() is called under intel_pstate_driver_lock,\nso this issue does not matter for changing the intel_pstate operation\nmode, but it theoretically can cause a crash to occur on CPU device hot\nremoval (which currently can only happen in virt, but it is formally\nsupported nevertheless).\n\nAddress this issue by modifying update_qos_request() to drop the\nreference to the policy later.","publishedAt":"2025-11-12T21:56:32.025Z","updatedAt":"2026-05-11T21:44:34.728Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"15ac9579ebdaf22a37d7f60b3a8efc1029732ef9","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"bc26564bcc659beb6d977cd6eb394041ec2f2851","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"ad4e8f9bdbef11a19b7cb93e7f313bf59bdcc3b4","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"0a58d3e77b22b087a57831c87cafd360e144a5bd","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"69a18ff6c60e8e113420f15355fad862cb45d38e","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"ba63d4e9857a72a89e71a4eff9f2cc8c283e94c3","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"57e4a6aadf12578b96a038373cffd54b3a58b092","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"69e5d50fcf4093fb3f9f41c4f931f12c2ca8c467","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/cpufreq/intel_pstate.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.4.301","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.246","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.195","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.157","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.113","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.54","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.4","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/cpufreq/intel_pstate.c"]}],"references":["https://git.kernel.org/stable/c/15ac9579ebdaf22a37d7f60b3a8efc1029732ef9","https://git.kernel.org/stable/c/bc26564bcc659beb6d977cd6eb394041ec2f2851","https://git.kernel.org/stable/c/ad4e8f9bdbef11a19b7cb93e7f313bf59bdcc3b4","https://git.kernel.org/stable/c/0a58d3e77b22b087a57831c87cafd360e144a5bd","https://git.kernel.org/stable/c/69a18ff6c60e8e113420f15355fad862cb45d38e","https://git.kernel.org/stable/c/ba63d4e9857a72a89e71a4eff9f2cc8c283e94c3","https://git.kernel.org/stable/c/57e4a6aadf12578b96a038373cffd54b3a58b092","https://git.kernel.org/stable/c/69e5d50fcf4093fb3f9f41c4f931f12c2ca8c467"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40194.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40194","state":"PUBLISHED","datePublished":"2025-11-12T21:56:32.025Z","dateUpdated":"2026-05-11T21:44:34.728Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.178Z"},"containers":{"cna":{"title":"cpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request()\n\nThe cpufreq_cpu_put() call in update_qos_request() takes place too early\nbecause the latter subsequently calls freq_qos_update_request() that\nindirectly accesses the policy object in question through the QoS request\nobject passed to it.\n\nFortunately, update_qos_request() is called under intel_pstate_driver_lock,\nso this issue does not matter for changing the intel_pstate operation\nmode, but it theoretically can cause a crash to occur on CPU device hot\nremoval (which currently can only happen in virt, but it is formally\nsupported nevertheless).\n\nAddress this issue by modifying update_qos_request() to drop the\nreference to the policy later."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"15ac9579ebdaf22a37d7f60b3a8efc1029732ef9","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"bc26564bcc659beb6d977cd6eb394041ec2f2851","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"ad4e8f9bdbef11a19b7cb93e7f313bf59bdcc3b4","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"0a58d3e77b22b087a57831c87cafd360e144a5bd","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"69a18ff6c60e8e113420f15355fad862cb45d38e","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"ba63d4e9857a72a89e71a4eff9f2cc8c283e94c3","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"57e4a6aadf12578b96a038373cffd54b3a58b092","versionType":"git"},{"version":"da5c504c7aae96db68c4b38e2564a88e91842d89","status":"affected","lessThan":"69e5d50fcf4093fb3f9f41c4f931f12c2ca8c467","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/cpufreq/intel_pstate.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.4.301","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.246","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.195","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.157","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.113","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.54","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.4","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/cpufreq/intel_pstate.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/15ac9579ebdaf22a37d7f60b3a8efc1029732ef9"},{"url":"https://git.kernel.org/stable/c/bc26564bcc659beb6d977cd6eb394041ec2f2851"},{"url":"https://git.kernel.org/stable/c/ad4e8f9bdbef11a19b7cb93e7f313bf59bdcc3b4"},{"url":"https://git.kernel.org/stable/c/0a58d3e77b22b087a57831c87cafd360e144a5bd"},{"url":"https://git.kernel.org/stable/c/69a18ff6c60e8e113420f15355fad862cb45d38e"},{"url":"https://git.kernel.org/stable/c/ba63d4e9857a72a89e71a4eff9f2cc8c283e94c3"},{"url":"https://git.kernel.org/stable/c/57e4a6aadf12578b96a038373cffd54b3a58b092"},{"url":"https://git.kernel.org/stable/c/69e5d50fcf4093fb3f9f41c4f931f12c2ca8c467"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:44:34.728Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.4.301"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.10.246"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.15.195"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.1.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.6.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.12.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.17.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}