356 lines
17 KiB
JSON
356 lines
17 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2021-47485",
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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": "2024-05-22T06:20:56.201Z",
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"datePublished": "2024-05-22T08:19:36.158Z",
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"dateUpdated": "2026-08-05T08:48:01.651Z"
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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": "2026-08-05T08:48:01.651Z"
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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\nIB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields\n\nOverflowing either addrlimit or bytes_togo can allow userspace to trigger\na buffer overflow of kernel memory. Check for overflows in all the places\ndoing math on user controlled buffers."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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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 bug is reached only via local writev/write_iter on the qib char device (/dev/ipath) after context assignment; it is not triggered by remote InfiniBand packet processing.\nAC:L - The attacker fully controls iovec lengths and PBC/header fields that drive the overflowing arithmetic, so the heap overflow can be triggered reliably once the QIB device is present and SDMA is running.\nPR:L - No capabilities are checked on the open/assign/writev path; access is only gated by /dev/ipath permissions, and this userspace SDMA interface is intended for unprivileged PSM/MPI processes on systems with the HCA.\nUI:N - The attacker opens the device and issues crafted write/writev calls themselves; no separate victim action is required.\nS:U - Impact is kernel memory corruption and privilege escalation on the same host authority, not a cross-boundary escape (VM/IOMMU/sandbox).\nC:H - A controllable kernel heap buffer overflow can be leveraged for arbitrary kernel memory disclosure.\nI:H - Kernel heap overflow of qib_user_sdma_pkt addr[]/adjacent memory enables arbitrary write and control-flow hijacking for full integrity compromise.\nA:H - The same heap corruption can cause kernel oops/panic or hang, fully impacting availability."
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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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"vendor": "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/qib/qib_user_sdma.c"
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],
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"drivers/infiniband/hw/qib/qib_user_sdma.c"
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],
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"versions": [
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{
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"version": "2.6.35",
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},
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{
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"version": "0",
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"lessThan": "2.6.35",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.4.292",
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"lessThanOrEqual": "4.4.*",
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"status": "unaffected",
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},
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{
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"status": "unaffected",
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"version": "4.19.216",
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"version": "5.10.77",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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{
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"version": "5.14.16",
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"lessThanOrEqual": "5.14.*",
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"status": "unaffected",
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{
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"version": "5.15",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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