{"id":"CVE-2026-68324","state":"PUBLISHED","title":"iommu/intel: Fix out-of-bounds memset in dmar_latency_disable()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/intel: Fix out-of-bounds memset in dmar_latency_disable()\n\ndmar_latency_disable() intends to zero out only the single\nlatency_statistic entry for the given type, but the memset size was\ncomputed as sizeof(*lstat) * DMAR_LATENCY_NUM, which clears the entire\narray starting from &lstat[type].\n\nWhen type > 0, this writes beyond the end of the allocated array,\ncorrupting adjacent memory.\n\nFix by using sizeof(*lstat) to clear only the target entry.","publishedAt":"2026-08-10T12:03:00.073Z","updatedAt":"2026-08-19T16:33:15.575Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"80f3605991461679c298ea2045c350ee3cf36de3","versionType":"git"},{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"104d89cf5b01cb66ff975d91ed42f61b3904df53","versionType":"git"},{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"3078d82e7fe9048a2b90a992e71af7cd7ef881fa","versionType":"git"},{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"866a35735e56b9dc81cbc33899255134adf6d8b3","versionType":"git"},{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"d06fea9b85f038690f55e72fe0c45e113715a85a","versionType":"git"},{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"0e28ca1c3204b51068579defc904a0dfba5e5c57","versionType":"git"},{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"754f8efe45f87e3a9c6871b645b2f9d46d1b407b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iommu/intel/perf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.14","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iommu/intel/perf.c"]}],"references":["https://git.kernel.org/stable/c/80f3605991461679c298ea2045c350ee3cf36de3","https://git.kernel.org/stable/c/104d89cf5b01cb66ff975d91ed42f61b3904df53","https://git.kernel.org/stable/c/3078d82e7fe9048a2b90a992e71af7cd7ef881fa","https://git.kernel.org/stable/c/866a35735e56b9dc81cbc33899255134adf6d8b3","https://git.kernel.org/stable/c/d06fea9b85f038690f55e72fe0c45e113715a85a","https://git.kernel.org/stable/c/0e28ca1c3204b51068579defc904a0dfba5e5c57","https://git.kernel.org/stable/c/754f8efe45f87e3a9c6871b645b2f9d46d1b407b"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68324.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68324","state":"PUBLISHED","datePublished":"2026-08-10T12:03:00.073Z","dateUpdated":"2026-08-19T16:33:15.575Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.382Z"},"containers":{"cna":{"title":"iommu/intel: Fix out-of-bounds memset in dmar_latency_disable()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/intel: Fix out-of-bounds memset in dmar_latency_disable()\n\ndmar_latency_disable() intends to zero out only the single\nlatency_statistic entry for the given type, but the memset size was\ncomputed as sizeof(*lstat) * DMAR_LATENCY_NUM, which clears the entire\narray starting from &lstat[type].\n\nWhen type > 0, this writes beyond the end of the allocated array,\ncorrupting adjacent memory.\n\nFix by using sizeof(*lstat) to clear only the target entry."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"80f3605991461679c298ea2045c350ee3cf36de3","versionType":"git"},{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"104d89cf5b01cb66ff975d91ed42f61b3904df53","versionType":"git"},{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"3078d82e7fe9048a2b90a992e71af7cd7ef881fa","versionType":"git"},{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"866a35735e56b9dc81cbc33899255134adf6d8b3","versionType":"git"},{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"d06fea9b85f038690f55e72fe0c45e113715a85a","versionType":"git"},{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"0e28ca1c3204b51068579defc904a0dfba5e5c57","versionType":"git"},{"version":"55ee5e67a59a1b6f388d7a1c7b24022145f47a3e","status":"affected","lessThan":"754f8efe45f87e3a9c6871b645b2f9d46d1b407b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iommu/intel/perf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.14","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iommu/intel/perf.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/80f3605991461679c298ea2045c350ee3cf36de3"},{"url":"https://git.kernel.org/stable/c/104d89cf5b01cb66ff975d91ed42f61b3904df53"},{"url":"https://git.kernel.org/stable/c/3078d82e7fe9048a2b90a992e71af7cd7ef881fa"},{"url":"https://git.kernel.org/stable/c/866a35735e56b9dc81cbc33899255134adf6d8b3"},{"url":"https://git.kernel.org/stable/c/d06fea9b85f038690f55e72fe0c45e113715a85a"},{"url":"https://git.kernel.org/stable/c/0e28ca1c3204b51068579defc904a0dfba5e5c57"},{"url":"https://git.kernel.org/stable/c/754f8efe45f87e3a9c6871b645b2f9d46d1b407b"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-19T16:33:15.575Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}