{"id":"CVE-2026-98004","state":"PUBLISHED","title":"iommu/riscv: Serialize command queue publishing","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/riscv: Serialize command queue publishing\n\nSerialize command queue publishing so software producer state advances only\nafter a command is written and the hardware tail is updated. Wait for\nhardware consumption outside the queue lock when the command queue is full\nso other CPUs are not blocked behind a long poll.","publishedAt":"2026-09-25T10:23:31.134Z","updatedAt":"2026-10-19T09:12:09.901Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"856c0cfe5c5f6a2cc8d995872eb67bff9c68c57c","status":"affected","lessThan":"787405e9e7bdc53ea7e063fe7b855171b4bd0e91","versionType":"git"},{"version":"856c0cfe5c5f6a2cc8d995872eb67bff9c68c57c","status":"affected","lessThan":"6d4c12ab9ab8db87411c863a54e0e97f9197afde","versionType":"git"},{"version":"856c0cfe5c5f6a2cc8d995872eb67bff9c68c57c","status":"affected","lessThan":"ca58afa40946acd252a50fa4d4a86f15847a3d7d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iommu/riscv/iommu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"6.18.57","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/iommu/riscv/iommu.c"]}],"references":["https://git.kernel.org/stable/c/787405e9e7bdc53ea7e063fe7b855171b4bd0e91","https://git.kernel.org/stable/c/6d4c12ab9ab8db87411c863a54e0e97f9197afde","https://git.kernel.org/stable/c/ca58afa40946acd252a50fa4d4a86f15847a3d7d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98004.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98004","state":"PUBLISHED","datePublished":"2026-09-25T10:23:31.134Z","dateUpdated":"2026-10-19T09:12:09.901Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:19:56.068Z"},"containers":{"cna":{"title":"iommu/riscv: Serialize command queue publishing","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/riscv: Serialize command queue publishing\n\nSerialize command queue publishing so software producer state advances only\nafter a command is written and the hardware tail is updated. Wait for\nhardware consumption outside the queue lock when the command queue is full\nso other CPUs are not blocked behind a long poll."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"856c0cfe5c5f6a2cc8d995872eb67bff9c68c57c","status":"affected","lessThan":"787405e9e7bdc53ea7e063fe7b855171b4bd0e91","versionType":"git"},{"version":"856c0cfe5c5f6a2cc8d995872eb67bff9c68c57c","status":"affected","lessThan":"6d4c12ab9ab8db87411c863a54e0e97f9197afde","versionType":"git"},{"version":"856c0cfe5c5f6a2cc8d995872eb67bff9c68c57c","status":"affected","lessThan":"ca58afa40946acd252a50fa4d4a86f15847a3d7d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iommu/riscv/iommu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"6.18.57","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/iommu/riscv/iommu.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/787405e9e7bdc53ea7e063fe7b855171b4bd0e91"},{"url":"https://git.kernel.org/stable/c/6d4c12ab9ab8db87411c863a54e0e97f9197afde"},{"url":"https://git.kernel.org/stable/c/ca58afa40946acd252a50fa4d4a86f15847a3d7d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:12:09.901Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}