{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-39681","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:20:57.113Z","datePublished":"2025-09-05T17:20:47.564Z","dateUpdated":"2026-05-12T12:06:07.711Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:34:11.780Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper\n\nSince\n\n  923f3a2b48bd (\"x86/resctrl: Query LLC monitoring properties once during boot\")\n\nresctrl_cpu_detect() has been moved from common CPU initialization code to\nthe vendor-specific BSP init helper, while Hygon didn't put that call in their\ncode.\n\nThis triggers a division by zero fault during early booting stage on our\nmachines with X86_FEATURE_CQM* supported, where get_rdt_mon_resources() tries\nto calculate mon_l3_config with uninitialized boot_cpu_data.x86_cache_occ_scale.\n\nAdd the missing resctrl_cpu_detect() in the Hygon BSP init helper.\n\n  [ bp: Massage commit message. ]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/cpu/hygon.c"],"versions":[{"version":"923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9","lessThan":"62f12cde10118253348a7540e85606869bd69432","status":"affected","versionType":"git"},{"version":"923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9","lessThan":"873f32201df8876bdb2563e3187e79149427cab4","status":"affected","versionType":"git"},{"version":"923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9","lessThan":"fb81222c1559f89bfe3aa1010f6d112531d55353","status":"affected","versionType":"git"},{"version":"923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9","lessThan":"7207923d8453ebfb35667c1736169f2dd796772e","status":"affected","versionType":"git"},{"version":"923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9","lessThan":"a9e5924daa954c9f585c1ca00358afe71d6781c4","status":"affected","versionType":"git"},{"version":"923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9","lessThan":"d23264c257a70dbe021b43b3bc2ee16134cd2c69","status":"affected","versionType":"git"},{"version":"923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9","lessThan":"d8df126349dad855cdfedd6bbf315bad2e901c2f","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/cpu/hygon.c"],"versions":[{"version":"5.8","status":"affected"},{"version":"0","lessThan":"5.8","status":"unaffected","versionType":"semver"},{"version":"5.10.242","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.190","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.149","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.103","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.44","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.16.4","lessThanOrEqual":"6.16.*","status":"unaffected","versionType":"semver"},{"version":"6.17","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":"5.8","versionEndExcluding":"5.10.242"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.15.190"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.1.149"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.6.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.12.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.16.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.17"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/62f12cde10118253348a7540e85606869bd69432"},{"url":"https://git.kernel.org/stable/c/873f32201df8876bdb2563e3187e79149427cab4"},{"url":"https://git.kernel.org/stable/c/fb81222c1559f89bfe3aa1010f6d112531d55353"},{"url":"https://git.kernel.org/stable/c/7207923d8453ebfb35667c1736169f2dd796772e"},{"url":"https://git.kernel.org/stable/c/a9e5924daa954c9f585c1ca00358afe71d6781c4"},{"url":"https://git.kernel.org/stable/c/d23264c257a70dbe021b43b3bc2ee16134cd2c69"},{"url":"https://git.kernel.org/stable/c/d8df126349dad855cdfedd6bbf315bad2e901c2f"}],"title":"x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T17:42:12.739Z"}},{"x_adpType":"supplier","providerMetadata":{"orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","shortName":"siemens-SADP","dateUpdated":"2026-05-12T12:06:07.711Z"},"affected":[{"vendor":"Siemens","product":"SIMATIC CN 4100","versions":[{"status":"affected","version":"0","lessThan":"V5.0","versionType":"custom"}],"defaultStatus":"unknown"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-032379.html"}]}]}}