{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-40990", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-12T12:17:45.605Z", "datePublished": "2024-07-12T12:37:34.485Z", "dateUpdated": "2026-08-05T11:34:28.146Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:34:28.146Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Add check for srq max_sge attribute\n\nmax_sge attribute is passed by the user, and is inserted and used\nunchecked, so verify that the value doesn't exceed maximum allowed value\nbefore using it." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable code is reached only through the local uverbs character device `/dev/infiniband/uverbsN` via the CREATE_SRQ/CREATE_XSRQ ioctl-style command; there is no path from a remote RDMA peer or network packet into `mlx5_ib_create_srq()` with an attacker-chosen `max_sge`.\nAC:L - The attacker fully controls `max_sge` (a raw `__u32` copied from the uverbs command with no core-layer validation) and `max_wr`, so the oversized `desc_size`/`wqe_shift`, the truncated firmware `log_rq_stride` field, and the undersized PAS computation are produced deterministically on the first attempt with no race or layout dependency.\nPR:L - `uverbs_devnode()` makes `/dev/infiniband/uverbs*` mode 0666 in the kernel itself, and allocating a PD plus creating an SRQ requires no capability (only a non-zero default `RLIMIT_MEMLOCK` for `ib_umem_get()`), so any unprivileged local user — including one inside a container with the RDMA device exposed — can trigger it.\nUI:N - The attacker performs the entire sequence (open uverbs device, alloc PD, create SRQ) itself; no action by any other user or administrator is needed.\nS:U - The corruption and its consequences are confined to the kernel's own security authority on the same host; no VM, IOMMU, or sandbox boundary is crossed by the flaw itself.\nC:H - The unchecked value undersizes the `kvzalloc()`'d CREATE_SRQ mailbox and its PAS array while `mlx5_ib_populate_pas()` is bounded only by the umem block count, and it desynchronizes the firmware's WQ geometry from the kernel's — memory corruption of this kind is leverageable for kernel heap disclosure, and on branches lacking the `WARN_ON` guard the device is handed a truncated physical-address list to DMA against.\nI:H - The same undersized-PAS / out-of-bounds descriptor-write condition yields a kernel heap write primitive, and the truncated `log_rq_stride`/`log_wq_stride` firmware fields let the NIC operate on a work queue whose stride and extent disagree with the memory actually registered for it, giving attacker-influenced writes.\nA:H - The path reliably produces a user-triggerable `WARN_ON()` in `__set_srq_page_size()` and a shift-out-of-bounds in `get_pas_size()` (kernel panic under `panic_on_warn` or UBSAN trap), and feeding the ConnectX firmware an inconsistent WQ geometry can drive the device into a fatal/health-recovery state that takes down all traffic on the adapter." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/infiniband/hw/mlx5/srq.c" ], "versions": [ { "version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "lessThan": "7186b81c1f15e39069b1af172c6a951728ed3511", "status": "affected", "versionType": "git" }, { "version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "lessThan": "1e692244bf7dd827dd72edc6c4a3b36ae572f03c", "status": "affected", "versionType": "git" }, { "version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "lessThan": "999586418600b4b3b93c2a0edd3a4ca71ee759bf", "status": "affected", "versionType": "git" }, { "version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "lessThan": "e0deb0e9c967b61420235f7f17a4450b4b4d6ce2", "status": "affected", "versionType": "git" }, { "version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "lessThan": "4ab99e3613139f026d2d8ba954819e2876120ab3", "status": "affected", "versionType": "git" }, { "version": "e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c", "lessThan": "36ab7ada64caf08f10ee5a114d39964d1f91e81d", "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/infiniband/hw/mlx5/srq.c" ], "versions": [ { "version": "3.11", "status": "affected" }, { "version": "0", "lessThan": "3.11", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.221", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.162", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.96", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.36", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.7", "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": "3.11", "versionEndExcluding": "5.10.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "5.15.162" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.1.96" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.6.36" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.9.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/7186b81c1f15e39069b1af172c6a951728ed3511" }, { "url": "https://git.kernel.org/stable/c/1e692244bf7dd827dd72edc6c4a3b36ae572f03c" }, { "url": "https://git.kernel.org/stable/c/999586418600b4b3b93c2a0edd3a4ca71ee759bf" }, { "url": "https://git.kernel.org/stable/c/e0deb0e9c967b61420235f7f17a4450b4b4d6ce2" }, { "url": 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"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": "2025-11-03T21:58:55.239Z" } }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-40990", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T17:01:51.391484Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:20.373Z" } } ] } }