CVE-2026-74378
CVE CVE-2026-74378EUVD EUVD-2026-59525Published 2026-08-15T05:58:56.000ZLast changed 2026-08-17T05:46:30.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe get_srq_wqe() reads wqe->dma.num_sge from the shared receive queue buffer, which is mapped into userspace. It validates num_sge against max_sge, but then re-reads the same field to calculate the memcpy size. A concurrent userspace thread can modify num_sge between validation and use, causing a heap buffer overflow when copying the WQE into qp->resp.srq_wqe. Read num_sge into a local variable and use it for both the bounds check and the size calculation.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 4.8; patch: 0; 8700e3e7c4857d28ebaa824509934556da0b3e76 <3cfa2a3adc51b7c57729961a03446962ff10e3d2; patch: 6.1.178; patch: 7.2; patch: 6.18.40; patch: 7.1.5; 8700e3e7c4857d28ebaa824509934556da0b3e76 <3e07ea9579dc9553d2285c26c2823931358aa3b8; patch: 6.6.145; 8700e3e7c4857d28ebaa824509934556da0b3e76 <b9800d7953d119bcc068c74587d48e4ba0313629; 8700e3e7c4857d28ebaa824509934556da0b3e76 <cd19a6345e3727adafafa5954b58b13c92e13b80; 8700e3e7c4857d28ebaa824509934556da0b3e76 <02558c86b6b761063e9399e6b939984500327ef1; patch: 6.12.97; 8700e3e7c4857d28ebaa824509934556da0b3e76 <22b8fbded65b8c441b634a185f8da67657df6c50
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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