CVE-2026-74378
- Source
- https://cve.org/CVERecord?id=CVE-2026-74378
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-74378.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-74378
- Downstream
- Published
- 2026-08-15T05:58:56Z
- Modified
- 2026-08-18T04:17:30Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74378.json" }- References
-
- https://git.kernel.org/stable/c/02558c86b6b761063e9399e6b939984500327ef1
- https://git.kernel.org/stable/c/22b8fbded65b8c441b634a185f8da67657df6c50
- https://git.kernel.org/stable/c/3cfa2a3adc51b7c57729961a03446962ff10e3d2
- https://git.kernel.org/stable/c/3e07ea9579dc9553d2285c26c2823931358aa3b8
- https://git.kernel.org/stable/c/b9800d7953d119bcc068c74587d48e4ba0313629
- https://git.kernel.org/stable/c/cd19a6345e3727adafafa5954b58b13c92e13b80
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74378.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-74378
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8700e3e7c4857d28ebaa824509934556da0b3e76Fixed3cfa2a3adc51b7c57729961a03446962ff10e3d2Fixedcd19a6345e3727adafafa5954b58b13c92e13b80Fixed3e07ea9579dc9553d2285c26c2823931358aa3b8Fixed02558c86b6b761063e9399e6b939984500327ef1Fixedb9800d7953d119bcc068c74587d48e4ba0313629Fixed22b8fbded65b8c441b634a185f8da67657df6c50
Linux / Kernel
Package
- Name
- Kernel