Answer in brief
CVE-2026-74378 records a Unknown severity 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). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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). 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 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 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.
Answer in brief
CVE-2026-74378 records a Unknown severity 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). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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). 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 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 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.