7.8

CVE-2026-90435: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-90435DEBIAN-CVE-2026-90435
Published 17-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-90435 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.3% 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
0.13%
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 1 · Related 1
OPENSUSE-SU-2026:11893-1

Timeline

  1. 17-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix integer overflow of user QP buffer size set_user_buf_size() computes the QP buffer size by left-shifting the user-supplied rq.wqe_cnt and rq.wqe_shift values as signed integers. A sufficiently large rq.wqe_cnt causes signed integer overflow, which is undefined behavior, and yields a small or negative buf_size, causing ib_umem_get() to map a buffer smaller than the hardware will actually write into. Replace the shifts and addition with check_shl_overflow() and check_add_overflow(), rejecting invalid user inputs. Moreover, guard the identical shift computing qp->sq.offset in _create_user_qp() before set_user_buf_size() is reached.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.13%

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

Ubuntu169 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c, < ccce6b7ef1d7efc59ccba3421e1339c6e63a3d20 | ≥ e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c, < d99622e40aaa910ade681dfd4dc0fa240a011331 | ≥ e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c, < c845e5e05140ea1bc64a5b1107942d93c876034d | ≥ e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c, < 42fb8aefffff5b458aaa66803364a16e0ea44129 | ≥ e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c, < d7fa2ff72ad1861eac194a4e0075d504ba8c246e | ≥ e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c, < 5b6cfc6d7ff0959dd9766fdc24286a253b59ca77 | ≥ e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c, < f917707f0de0832b8ab582391b1f64e549995c6c | ≥ e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c, < dec47e4b0fe34afdf38caa72b4408ba95502e5de | 3.11

3 vendors · 172 products

References

13 links
Show all 13 references