RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.14 % · percentile 4 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
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.
References
- https://git.kernel.org/stable/c/c8db0e5ab0b6c540214c46c56aaac7cbcb0967fe
- https://git.kernel.org/stable/c/e48daa94ad2d406225b73491fc935064716f0ec7
- https://git.kernel.org/stable/c/3cfa2a3adc51b7c57729961a03446962ff10e3d2
- https://git.kernel.org/stable/c/cd19a6345e3727adafafa5954b58b13c92e13b80
- https://git.kernel.org/stable/c/3e07ea9579dc9553d2285c26c2823931358aa3b8
- https://git.kernel.org/stable/c/02558c86b6b761063e9399e6b939984500327ef1
- https://git.kernel.org/stable/c/b9800d7953d119bcc068c74587d48e4ba0313629
- https://git.kernel.org/stable/c/22b8fbded65b8c441b634a185f8da67657df6c50
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-59525
- GCVE · GCVE-0-2026-74378
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1372 — Multiples vulnérabilités dans les produits SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1335 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1333 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1288 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1255 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1231 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 8700e3e7c4857d28ebaa824509934556da0b3e76 < c8db0e5ab0b6c540214c46c56aaac7cbcb0967fe ; affected 8700e3e7c4857d28ebaa824509934556da0b3e76 < e48daa94ad2d406225b73491fc935064716f0ec7 ; affected 8700e3e7c4857d28ebaa824509934556da0b3e76 < 3cfa2a3adc51b7c57729961a03446962ff10e3d2 ; affected 8700e3e7c4857d28ebaa824509934556da0b3e76 < cd19a6345e3727adafafa5954b58b13c92e13b80 ; affected 8700e3e7c4857d28ebaa824509934556da0b3e76 < 3e07ea9579dc9553d2285c26c2823931358aa3b8 ; affected 8700e3e7c4857d28ebaa824509934556da0b3e76 < 02558c86b6b761063e9399e6b939984500327ef1 |
| Linux · Linux | affected 4.8 ; unaffected 0 < 4.8 ; unaffected 5.10.270 ≤ 5.10.* ; unaffected 5.15.221 ≤ 5.15.* ; unaffected 6.1.178 ≤ 6.1.* ; unaffected 6.6.145 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |