Answer in brief
CVE-2026-74378 records a High severity (CVSS 7.8) vulnerability in RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8700e3e7c4857d28ebaa824509934556da0b3e76 <3cfa2a3adc51b7c57729961a03446962ff10e3d2 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <cd19a6345e3727adafafa5954b58b13c92e13b80 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <3e07ea9579dc9553d2285c26c2823931358aa3b8 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <02558c86b6b761063e9399e6b939984500327ef1 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <b9800d7953d119bcc068c74587d48e4ba0313629 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <22b8fbded65b8c441b634a185f8da67657df6c50 | 3cfa2a3adc51b7c57729961a03446962ff10e3d2, cd19a6345e3727adafafa5954b58b13c92e13b80, 3e07ea9579dc9553d2285c26c2823931358aa3b8, 02558c86b6b761063e9399e6b939984500327ef1, b9800d7953d119bcc068c74587d48e4ba0313629, 22b8fbded65b8c441b634a185f8da67657df6c50 |
| Linux/Linuxgeneric | 4.8 | Not reported |
| Linux/Linuxgeneric | >=8700e3e7c4857d28ebaa824509934556da0b3e76 <c8db0e5ab0b6c540214c46c56aaac7cbcb0967fe || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <e48daa94ad2d406225b73491fc935064716f0ec7 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <3cfa2a3adc51b7c57729961a03446962ff10e3d2 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <cd19a6345e3727adafafa5954b58b13c92e13b80 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <3e07ea9579dc9553d2285c26c2823931358aa3b8 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <02558c86b6b761063e9399e6b939984500327ef1 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <b9800d7953d119bcc068c74587d48e4ba0313629 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <22b8fbded65b8c441b634a185f8da67657df6c50 | c8db0e5ab0b6c540214c46c56aaac7cbcb0967fe, e48daa94ad2d406225b73491fc935064716f0ec7, 3cfa2a3adc51b7c57729961a03446962ff10e3d2, cd19a6345e3727adafafa5954b58b13c92e13b80, 3e07ea9579dc9553d2285c26c2823931358aa3b8, 02558c86b6b761063e9399e6b939984500327ef1, b9800d7953d119bcc068c74587d48e4ba0313629, 22b8fbded65b8c441b634a185f8da67657df6c50 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.