{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-41079","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-07-12T12:17:45.632Z","datePublished":"2024-07-29T15:04:16.733Z","dateUpdated":"2026-08-05T11:35:14.304Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:35:14.304Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: always initialize cqe.result\n\nThe spec doesn't mandate that the first two double words (aka results)\nfor the command queue entry need to be set to 0 when they are not\nused (not specified). Though, the target implemention returns 0 for TCP\nand FC but not for RDMA.\n\nLet's make RDMA behave the same and thus explicitly initializing the\nresult field. This prevents leaking any data from the stack."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - nvmet is the in-kernel NVMe-over-Fabrics target; the leaked CQE is delivered to a remote initiator over RDMA (RoCEv2 over UDP/IP, iWARP over TCP, and soft-RoCE/siw over ordinary Ethernet are all IP-routable) on the standard NVMe-oF port. The defect itself is in transport-generic `nvmet_req_init()`, and NVMe-oF targets are explicitly network-facing services.\nAC:L - The leak is fully deterministic — establish an RDMA CM connection and send any command capsule, and the uninitialized 8-byte result field is returned every time. There is no race, no timing window, and no memory-layout precondition required to obtain the disclosure.\nPR:N - The response buffers are allocated directly from the RDMA CM connect request, and any command sent before Connect completes (`req->sq->ctrl == NULL`) is rejected by `nvmet_parse_connect_cmd()` and completed with the uninitialized CQE — no host NQN validation, no DH-HMAC-CHAP authentication, and no valid NVMe Connect is needed. This is a purely pre-authentication code path.\nUI:N - Exploitation requires only that the attacker connect to the exported NVMe-oF target and issue commands; no action by any local user or administrator is involved.\nS:U - The disclosed data and the vulnerable code are both within the target kernel's security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Each response leaks 8 bytes of uninitialized kmalloc-16 slab memory, and the attacker controls the volume without bound — `hsqsize` is uncapped for I/O queues (up to ~131072 fresh CQEs per queue) and `nvmet_rdma_get_rsp()` allocates and frees a brand-new CQE per in-flight command past the free list, giving a repeatable spray-and-harvest oracle over recently-freed heap objects that readily yields kernel pointers and other sensitive residue.\nI:N - The bug only causes stale, non-attacker-chosen bytes to be emitted in the completion entry; no kernel data structure, file content, or target state is modified as a result.\nA:N - Reading uninitialized memory within a validly allocated 16-byte object causes no crash, hang, or resource exhaustion — the target continues operating normally while leaking."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/target/core.c","drivers/nvme/target/fabrics-cmd-auth.c","drivers/nvme/target/fabrics-cmd.c"],"versions":[{"version":"a07b4970f464f13640e28e16dad6cfa33647cc99","lessThan":"c6a2cf8b0764f3ba7d9bff58c8775a6d4476bb29","status":"affected","versionType":"git"},{"version":"a07b4970f464f13640e28e16dad6cfa33647cc99","lessThan":"30d35b24b7957922f81cfdaa66f2e1b1e9b9aed2","status":"affected","versionType":"git"},{"version":"a07b4970f464f13640e28e16dad6cfa33647cc99","lessThan":"10967873b80742261527a071954be8b54f0f8e4d","status":"affected","versionType":"git"},{"version":"a07b4970f464f13640e28e16dad6cfa33647cc99","lessThan":"0990e8a863645496b9e3f91cfcfd63cd95c80319","status":"affected","versionType":"git"},{"version":"a07b4970f464f13640e28e16dad6cfa33647cc99","lessThan":"cd0c1b8e045a8d2785342b385cb2684d9b48e426","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/target/core.c","drivers/nvme/target/fabrics-cmd-auth.c","drivers/nvme/target/fabrics-cmd.c"],"versions":[{"version":"4.8","status":"affected"},{"version":"0","lessThan":"4.8","status":"unaffected","versionType":"semver"},{"version":"5.15.209","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.101","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.42","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.9.11","lessThanOrEqual":"6.9.*","status":"unaffected","versionType":"semver"},{"version":"6.10","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":"4.8","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.1.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.6.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.9.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.10"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c6a2cf8b0764f3ba7d9bff58c8775a6d4476bb29"},{"url":"https://git.kernel.org/stable/c/30d35b24b7957922f81cfdaa66f2e1b1e9b9aed2"},{"url":"https://git.kernel.org/stable/c/10967873b80742261527a071954be8b54f0f8e4d"},{"url":"https://git.kernel.org/stable/c/0990e8a863645496b9e3f91cfcfd63cd95c80319"},{"url":"https://git.kernel.org/stable/c/cd0c1b8e045a8d2785342b385cb2684d9b48e426"}],"title":"nvmet: always initialize cqe.result","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/30d35b24b7957922f81cfdaa66f2e1b1e9b9aed2","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/10967873b80742261527a071954be8b54f0f8e4d","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/0990e8a863645496b9e3f91cfcfd63cd95c80319","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/cd0c1b8e045a8d2785342b385cb2684d9b48e426","tags":["x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T22:00:36.974Z"}},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-41079","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T16:21:11.653239Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-11T17:33:59.600Z"}}]}}