7.8

CVE-2026-74378: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-74378DEBIAN-CVE-2026-74378
Published 15-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-74378 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.2% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.14%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 24 · Related 24
OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23881-1SUSE-SU-2026:23887-1SUSE-SU-2026:23897-1SUSE-SU-2026:23902-1SUSE-SU-2026:24181-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

0.00 pp

From 0.14% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu168 products
  • linuxAll versions (No fix recorded) | < 6.8.0-147.147 | < 7.0.0-38.38
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1067.70 | < 7.0.0-1014.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.180-1 | < 6.12.100-1 | < 7.1.5-1
Linux1 product
  • linux≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < c8db0e5ab0b6c540214c46c56aaac7cbcb0967fe | ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < e48daa94ad2d406225b73491fc935064716f0ec7 | ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < 3cfa2a3adc51b7c57729961a03446962ff10e3d2 | ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < cd19a6345e3727adafafa5954b58b13c92e13b80 | ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < 3e07ea9579dc9553d2285c26c2823931358aa3b8 | ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < 02558c86b6b761063e9399e6b939984500327ef1 | ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < b9800d7953d119bcc068c74587d48e4ba0313629 | ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < 22b8fbded65b8c441b634a185f8da67657df6c50 | 4.8

3 vendors · 170 products

References

21 links
Show all 21 references