CVE-2026-74378

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.8
EG Score
7.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (6)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cd19a6345e3727adafafa5954b58b13c92e13b80
generic

RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b9800d7953d119bcc068c74587d48e4ba0313629
generic

RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3e07ea9579dc9553d2285c26c2823931358aa3b8
generic

RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3cfa2a3adc51b7c57729961a03446962ff10e3d2
generic

RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/22b8fbded65b8c441b634a185f8da67657df6c50
generic

RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/02558c86b6b761063e9399e6b939984500327ef1

Vendor Advisories for CVE-2026-74378(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 31× in last 7d / 31× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 04:50 UTCEG score recompute
  2. 2026-08-21 04:50 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 17:22 UTCGHSA enrichment
  5. 2026-08-20 05:50 UTCGHSA enrichment
  6. 2026-08-19 18:22 UTCEG score recompute
  7. 2026-08-19 18:22 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 05:32 UTCGHSA enrichment
  10. 2026-08-18 18:03 UTCEG score recompute
  11. 2026-08-18 18:03 UTCGHSA enrichment
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 06:24 UTCGHSA enrichment
  15. 2026-08-17 18:57 UTCEG score recompute
  16. 2026-08-17 18:56 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-17 06:26 UTCEG score recompute
  19. 2026-08-17 06:26 UTCGHSA enrichment
  20. 2026-08-17 05:56 UTCEG score recompute▲ 7.80
  21. 2026-08-17 05:56 UTCGHSA enrichment
  22. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  23. 2026-08-17 05:26 UTCEG score recompute
  24. 2026-08-17 05:26 UTCGHSA enrichment
  25. 2026-08-17 05:24 UTCMITRE cvelistV5
Show 6 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 14:56 UTCEPSS rescore
  3. 2026-08-16 02:15 UTCEPSS rescore
  4. 2026-08-15 06:23 UTCNVD update
  5. 2026-08-15 06:14 UTCEG score recompute
  6. 2026-08-15 06:12 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74378?
CVE-2026-74378 is a high vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix TOCTOU heap overflow in getsrqwqe getsrqwqe() 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…
When was CVE-2026-74378 disclosed?
CVE-2026-74378 was first published in the National Vulnerability Database on August 15, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74378 actively exploited?
CVE-2026-74378 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.0% of all scored CVEs.
What is the CVSS score of CVE-2026-74378?
CVE-2026-74378 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-74378?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74378, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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