{"id":"CVE-2026-74361","state":"PUBLISHED","title":"nvme: fix FDP fdpcidx bounds check","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix FDP fdpcidx bounds check\n\nThe fdpcidx bounds check sets n = NUMFDPC + 1 but used > instead of >=,\nincorrectly accepting fdp_idx when it equals n (i.e. NUMFDPC + 1).","publishedAt":"2026-08-15T05:58:44.857Z","updatedAt":"2026-10-16T18:55:35.477Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"30b5f20bb2ddab013035399e5c7e6577da49320a","status":"affected","lessThan":"5e406928404d67a8da8aa3ae21732e1ea1a04118","versionType":"git"},{"version":"30b5f20bb2ddab013035399e5c7e6577da49320a","status":"affected","lessThan":"5d0e7d2af884b91329235abb16652ae4eead8079","versionType":"git"},{"version":"30b5f20bb2ddab013035399e5c7e6577da49320a","status":"affected","lessThan":"0967074f6830718fd2597404ef119bddd0dbfd00","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","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/nvme/host/core.c"]}],"references":["https://git.kernel.org/stable/c/5e406928404d67a8da8aa3ae21732e1ea1a04118","https://git.kernel.org/stable/c/5d0e7d2af884b91329235abb16652ae4eead8079","https://git.kernel.org/stable/c/0967074f6830718fd2597404ef119bddd0dbfd00"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74361.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74361","state":"PUBLISHED","datePublished":"2026-08-15T05:58:44.857Z","dateUpdated":"2026-10-16T18:55:35.477Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.887Z"},"containers":{"cna":{"title":"nvme: fix FDP fdpcidx bounds check","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix FDP fdpcidx bounds check\n\nThe fdpcidx bounds check sets n = NUMFDPC + 1 but used > instead of >=,\nincorrectly accepting fdp_idx when it equals n (i.e. NUMFDPC + 1)."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"30b5f20bb2ddab013035399e5c7e6577da49320a","status":"affected","lessThan":"5e406928404d67a8da8aa3ae21732e1ea1a04118","versionType":"git"},{"version":"30b5f20bb2ddab013035399e5c7e6577da49320a","status":"affected","lessThan":"5d0e7d2af884b91329235abb16652ae4eead8079","versionType":"git"},{"version":"30b5f20bb2ddab013035399e5c7e6577da49320a","status":"affected","lessThan":"0967074f6830718fd2597404ef119bddd0dbfd00","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","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/nvme/host/core.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/5e406928404d67a8da8aa3ae21732e1ea1a04118"},{"url":"https://git.kernel.org/stable/c/5d0e7d2af884b91329235abb16652ae4eead8079"},{"url":"https://git.kernel.org/stable/c/0967074f6830718fd2597404ef119bddd0dbfd00"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"},"scenarios":[{"lang":"en","value":"AV:N - The bug is in the NVMe host driver while parsing Get Features/Get Log responses during namespace scan; a malicious NVMe-oF target can deliver crafted FDP data over TCP/RDMA to any host already using remote NVMe storage, which is the highest-impact reachable deployment.\nAC:L - An attacker controlling the NVMe endpoint fully sets fdpcidx and numfdpc in protocol responses and can reliably make fdpcidx equal numfdpc+1, walk one descriptor past the valid list, and hit the out-of-bounds read without races or victim-specific heap layout.\nPR:N - Exploitation needs no local account or capabilities on the victim; a remote malicious/compromised NVMe-oF target (or physical device inserted by an attacker) triggers parsing during connect/rescan/AEN-driven namespace scans without further local authorization.\nUI:N - No victim user action is required at exploit time because namespace scanning and AEN-triggered rescans run automatically in kernel workqueues once a controller is present, and a remote target can force rescans with Notice Namespace Changed events.\nS:U - Impact is confined to kernel memory and block-layer metadata on the host parsing the malicious device responses; it does not cross a VM, container, or IOMMU security boundary into a separate authority.\nC:H - Accepting fdpcidx=numfdpc+1 lets the descriptor walk advance past the last valid FDP configuration and then reads desc->nrg and desc->runs out of bounds, leaking adjacent kvmalloc/heap contents or attacker-crafted bytes from beyond the valid descriptor array.\nI:H - The out-of-bounds descriptor fields are copied into info->runs and influence queue write_stream_granularity limits, giving attacker-controlled modification of kernel block-layer state from memory corruption primitives that can be chained beyond a simple crash.\nA:H - If the out-of-bounds descriptor pointer lies past the allocated FDP log buffer, accessing desc->nrg/desc->runs can fault the kernel (oops/panic); even successful parsing still represents unsafe memory access with high availability risk under attacker control."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:46:20.518Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-74361","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T18:54:29.350780Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T18:55:35.477Z"}}]}}}