{"id":"CVE-2025-40346","state":"PUBLISHED","title":"arch_topology: Fix incorrect error check in topology_parse_cpu_capacity()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\narch_topology: Fix incorrect error check in topology_parse_cpu_capacity()\n\nFix incorrect use of PTR_ERR_OR_ZERO() in topology_parse_cpu_capacity()\nwhich causes the code to proceed with NULL clock pointers. The current\nlogic uses !PTR_ERR_OR_ZERO(cpu_clk) which evaluates to true for both\nvalid pointers and NULL, leading to potential NULL pointer dereference\nin clk_get_rate().\n\nPer include/linux/err.h documentation, PTR_ERR_OR_ZERO(ptr) returns:\n\"The error code within @ptr if it is an error pointer; 0 otherwise.\"\n\nThis means PTR_ERR_OR_ZERO() returns 0 for both valid pointers AND NULL\npointers. Therefore !PTR_ERR_OR_ZERO(cpu_clk) evaluates to true (proceed)\nwhen cpu_clk is either valid or NULL, causing clk_get_rate(NULL) to be\ncalled when of_clk_get() returns NULL.\n\nReplace with !IS_ERR_OR_NULL(cpu_clk) which only proceeds for valid\npointers, preventing potential NULL pointer dereference in clk_get_rate().","publishedAt":"2025-12-16T13:30:20.395Z","updatedAt":"2026-05-11T21:47:35.335Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"64da320252e43456cc9ec3055ff567f168467b37","versionType":"git"},{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"02fbea0864fd4a863671f5d418129258d7159f68","versionType":"git"},{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"a77f8434954cb1e9c42c3854e40855fdcf5ab235","versionType":"git"},{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"3373f263bb647fcc3b5237cfaef757633b9ee25e","versionType":"git"},{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"45379303124487db3a81219af7565d41f498167f","versionType":"git"},{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"3a01b2614e84361aa222f67bc628593987e5cdb2","versionType":"git"},{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"2eead19334516c8e9927c11b448fbe512b1f18a1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/arch_topology.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"5.10.246","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.196","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.158","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.115","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.56","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.6","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/base/arch_topology.c"]}],"references":["https://git.kernel.org/stable/c/64da320252e43456cc9ec3055ff567f168467b37","https://git.kernel.org/stable/c/02fbea0864fd4a863671f5d418129258d7159f68","https://git.kernel.org/stable/c/a77f8434954cb1e9c42c3854e40855fdcf5ab235","https://git.kernel.org/stable/c/3373f263bb647fcc3b5237cfaef757633b9ee25e","https://git.kernel.org/stable/c/45379303124487db3a81219af7565d41f498167f","https://git.kernel.org/stable/c/3a01b2614e84361aa222f67bc628593987e5cdb2","https://git.kernel.org/stable/c/2eead19334516c8e9927c11b448fbe512b1f18a1"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40346.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40346","state":"PUBLISHED","datePublished":"2025-12-16T13:30:20.395Z","dateUpdated":"2026-05-11T21:47:35.335Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.187Z"},"containers":{"cna":{"title":"arch_topology: Fix incorrect error check in topology_parse_cpu_capacity()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\narch_topology: Fix incorrect error check in topology_parse_cpu_capacity()\n\nFix incorrect use of PTR_ERR_OR_ZERO() in topology_parse_cpu_capacity()\nwhich causes the code to proceed with NULL clock pointers. The current\nlogic uses !PTR_ERR_OR_ZERO(cpu_clk) which evaluates to true for both\nvalid pointers and NULL, leading to potential NULL pointer dereference\nin clk_get_rate().\n\nPer include/linux/err.h documentation, PTR_ERR_OR_ZERO(ptr) returns:\n\"The error code within @ptr if it is an error pointer; 0 otherwise.\"\n\nThis means PTR_ERR_OR_ZERO() returns 0 for both valid pointers AND NULL\npointers. Therefore !PTR_ERR_OR_ZERO(cpu_clk) evaluates to true (proceed)\nwhen cpu_clk is either valid or NULL, causing clk_get_rate(NULL) to be\ncalled when of_clk_get() returns NULL.\n\nReplace with !IS_ERR_OR_NULL(cpu_clk) which only proceeds for valid\npointers, preventing potential NULL pointer dereference in clk_get_rate()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"64da320252e43456cc9ec3055ff567f168467b37","versionType":"git"},{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"02fbea0864fd4a863671f5d418129258d7159f68","versionType":"git"},{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"a77f8434954cb1e9c42c3854e40855fdcf5ab235","versionType":"git"},{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"3373f263bb647fcc3b5237cfaef757633b9ee25e","versionType":"git"},{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"45379303124487db3a81219af7565d41f498167f","versionType":"git"},{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"3a01b2614e84361aa222f67bc628593987e5cdb2","versionType":"git"},{"version":"b8fe128dad8f97cc9af7c55a264d1fc5ab677195","status":"affected","lessThan":"2eead19334516c8e9927c11b448fbe512b1f18a1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/arch_topology.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"5.10.246","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.196","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.158","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.115","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.56","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.6","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/base/arch_topology.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/64da320252e43456cc9ec3055ff567f168467b37"},{"url":"https://git.kernel.org/stable/c/02fbea0864fd4a863671f5d418129258d7159f68"},{"url":"https://git.kernel.org/stable/c/a77f8434954cb1e9c42c3854e40855fdcf5ab235"},{"url":"https://git.kernel.org/stable/c/3373f263bb647fcc3b5237cfaef757633b9ee25e"},{"url":"https://git.kernel.org/stable/c/45379303124487db3a81219af7565d41f498167f"},{"url":"https://git.kernel.org/stable/c/3a01b2614e84361aa222f67bc628593987e5cdb2"},{"url":"https://git.kernel.org/stable/c/2eead19334516c8e9927c11b448fbe512b1f18a1"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:47:35.335Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.10.246"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.15.196"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.1.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.6.115"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.12.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.17.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}