298 lines
16 KiB
JSON
298 lines
16 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-74378",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-08-15T05:44:03.890Z",
|
|
"datePublished": "2026-08-15T05:58:56.381Z",
|
|
"dateUpdated": "2026-10-16T18:55:36.455Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-09-14T11:58:46.129Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe\n\nget_srq_wqe() reads wqe->dma.num_sge from the shared receive queue\nbuffer, which is mapped into userspace. It validates num_sge against\nmax_sge, but then re-reads the same field to calculate the memcpy\nsize. A concurrent userspace thread can modify num_sge between\nvalidation and use, causing a heap buffer overflow when copying the\nWQE into qp->resp.srq_wqe.\n\nRead num_sge into a local variable and use it for both the bounds\ncheck and the size calculation."
|
|
}
|
|
],
|
|
"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 - Exploitation requires a local process with mmap write access to the SRQ receive queue shared with the kernel; although incoming RoCE/UDP packets trigger get_srq_wqe(), a remote peer cannot modify num_sge in the victim's userspace-mapped WQE buffer, so the TOCTOU overflow cannot be achieved from the network alone.\nAC:L - The attacker controls both sides of the race: a userspace thread that repeatedly rewrites num_sge in the mmap'd SRQ entry and the thread/process that posts recv WQEs and receives the triggering RoCE Send/Write packet, making the TOCTOU window reliably winnable without external timing luck.\nPR:L - An unprivileged local user with access to /dev/infiniband/uverbs can create an SRQ (mmap'd queue), associate a QP, and post recv buffers via ibverbs; rxe device setup via \"rdma link add type rxe\" is reachable with CAP_NET_ADMIN inside a user namespace (unshare -Urn).\nUI:N - No victim user interaction is required; the attacker operates their own malicious RDMA userspace process and can self-trigger the vulnerable responder path with RoCE request packets once SRQ/QP resources are configured.\nS:U - The heap overflow corrupts kernel memory within the rxe_qp responder context on the same host kernel, enabling local privilege escalation rather than crossing a VM, container, or IOMMU security boundary to impact a different authority.\nC:H - The attacker-controlled memcpy size causes an out-of-bounds copy from the mmap'd SRQ ring buffer and overflows the fixed qp->resp.srq_wqe kernel buffer, enabling adjacent kernel heap data disclosure and providing primitives that can be developed into arbitrary kernel memory reads.\nI:H - Overflowing qp->resp.srq_wqe corrupts subsequent fields in rxe_resp_info/rxe_qp (e.g., responder resource pointers and state), giving a kernel heap buffer overflow that can be leveraged for arbitrary kernel memory writes and local privilege escalation.\nA:H - Corrupting responder state inside rxe_qp can cause kernel oops/panic or wedged RDMA processing during packet handling; even failed exploitation attempts can crash the kernel through use of corrupted function pointers and queue state."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"drivers/infiniband/sw/rxe/rxe_resp.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
|
|
"lessThan": "c8db0e5ab0b6c540214c46c56aaac7cbcb0967fe",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
|
|
"lessThan": "e48daa94ad2d406225b73491fc935064716f0ec7",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
|
|
"lessThan": "3cfa2a3adc51b7c57729961a03446962ff10e3d2",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
|
|
"lessThan": "cd19a6345e3727adafafa5954b58b13c92e13b80",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
|
|
"lessThan": "3e07ea9579dc9553d2285c26c2823931358aa3b8",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
|
|
"lessThan": "02558c86b6b761063e9399e6b939984500327ef1",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
|
|
"lessThan": "b9800d7953d119bcc068c74587d48e4ba0313629",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
|
|
"lessThan": "22b8fbded65b8c441b634a185f8da67657df6c50",
|
|
"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/sw/rxe/rxe_resp.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "4.8",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "4.8",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.10.270",
|
|
"lessThanOrEqual": "5.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.15.221",
|
|
"lessThanOrEqual": "5.15.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.1.178",
|
|
"lessThanOrEqual": "6.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.145",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.97",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.40",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.1.5",
|
|
"lessThanOrEqual": "7.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.2",
|
|
"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": "5.10.270"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.8",
|
|
"versionEndExcluding": "5.15.221"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.8",
|
|
"versionEndExcluding": "6.1.178"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.8",
|
|
"versionEndExcluding": "6.6.145"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.8",
|
|
"versionEndExcluding": "6.12.97"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.8",
|
|
"versionEndExcluding": "6.18.40"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.8",
|
|
"versionEndExcluding": "7.1.5"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.8",
|
|
"versionEndExcluding": "7.2"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/c8db0e5ab0b6c540214c46c56aaac7cbcb0967fe"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/e48daa94ad2d406225b73491fc935064716f0ec7"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/3cfa2a3adc51b7c57729961a03446962ff10e3d2"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/cd19a6345e3727adafafa5954b58b13c92e13b80"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/3e07ea9579dc9553d2285c26c2823931358aa3b8"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/02558c86b6b761063e9399e6b939984500327ef1"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/b9800d7953d119bcc068c74587d48e4ba0313629"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/22b8fbded65b8c441b634a185f8da67657df6c50"
|
|
}
|
|
],
|
|
"title": "RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2026-74378",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "total"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2026-10-16T18:54:53.282881Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-10-16T18:55:36.455Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |