254 lines
12 KiB
JSON
254 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2024-38542",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-06-18T19:36:34.919Z",
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"datePublished": "2024-06-19T13:35:17.310Z",
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"dateUpdated": "2026-08-05T11:32:40.715Z"
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},
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"containers": {
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"cna": {
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:32:40.715Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mana_ib: boundary check before installing cq callbacks\n\nAdd a boundary check inside mana_ib_install_cq_cb to prevent index overflow."
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}
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],
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"metrics": [
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable code is reached only from local userspace via write()/ioctl() on /dev/infiniband/uverbs* (ibv_create_qp with IB_QPT_RAW_PACKET), not from any network-facing handler. No remote peer data influences the path.\nAC:L - The attacker deterministically drives the code path by creating raw-packet QPs (including RSS QPs with a 64-entry indirection table, allocating many HW CQs per call), and the missing check fires on any device/host-returned cq_id outside [0, max_num_cqs) — including the INVALID_QUEUE_ID sentinel the sibling remove helper explicitly guards against; on a confidential/untrusted-host Azure VM the id is fully attacker-chosen.\nPR:L - An unprivileged local user with access to the RDMA uverbs device node and CAP_NET_RAW — routinely granted to non-root RDMA/HPC workloads and included in default container capability sets — can trigger it; consistent with the existing scoring of the identical mana_ib_create_qp_rss/install_cq_cb path (CVE-2026-46117, CVE-2026-46145).\nUI:N - Exploitation is entirely self-contained in the attacker's own QP-creation sequence; no victim action, mount, or file open is required.\nS:U - The out-of-bounds access corrupts kernel memory within the same kernel security authority; there is no hypervisor, IOMMU, or sandbox boundary crossed.\nC:H - `WARN_ON(gc->cq_table[cq->queue.id])` performs an unbounded out-of-bounds read past the vcalloc'd table, and the resulting kernel-memory corruption is leverageable for arbitrary kernel read, disclosing sensitive data and defeating KASLR.\nI:H - `gc->cq_table[cq->queue.id] = gdma_cq` is an out-of-bounds write of a valid kernel heap pointer at an unvalidated index, and the stale entry is never cleared on teardown (remove_cq_cb bails on its bound check), giving a persistent write primitive usable for control-flow hijack and privilege escalation.\nA:H - An index beyond the table lands in unmapped vmalloc guard pages or corrupts adjacent kernel structures, producing an oops/panic; the completion path later dereferences cq_table entries, so a corrupted entry crashes the kernel."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/infiniband/hw/mana/cq.c"
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],
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{
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"programFiles": [
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"drivers/infiniband/hw/mana/cq.c"
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"version": "0",
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},
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"lessThanOrEqual": "6.8.*",
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"status": "unaffected",
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"version": "6.9.3",
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"status": "unaffected",
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},
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{
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"version": "6.10",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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"versionStartIncluding": "6.8.2",
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"versionEndExcluding": "6.8.12"
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"title": "RDMA/mana_ib: boundary check before installing cq callbacks",
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{
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"type": "ssvc",
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"content": {
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"timestamp": "2024-06-20T15:44:47.071270Z",
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"id": "CVE-2024-38542",
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