Answer in brief
CVE-2026-90435 records a Unknown severity vulnerability in RDMA/mlx5: Fix integer overflow of user QP buffer size. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <ccce6b7ef1d7efc59ccba3421e1339c6e63a3d20 || >=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <d99622e40aaa910ade681dfd4dc0fa240a011331 || >=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <c845e5e05140ea1bc64a5b1107942d93c876034d || >=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <42fb8aefffff5b458aaa66803364a16e0ea44129 || >=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <d7fa2ff72ad1861eac194a4e0075d504ba8c246e || >=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <5b6cfc6d7ff0959dd9766fdc24286a253b59ca77 || >=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <f917707f0de0832b8ab582391b1f64e549995c6c || >=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <dec47e4b0fe34afdf38caa72b4408ba95502e5de | ccce6b7ef1d7efc59ccba3421e1339c6e63a3d20, d99622e40aaa910ade681dfd4dc0fa240a011331, c845e5e05140ea1bc64a5b1107942d93c876034d, 42fb8aefffff5b458aaa66803364a16e0ea44129, d7fa2ff72ad1861eac194a4e0075d504ba8c246e, 5b6cfc6d7ff0959dd9766fdc24286a253b59ca77, f917707f0de0832b8ab582391b1f64e549995c6c, dec47e4b0fe34afdf38caa72b4408ba95502e5de |
| Linux/Linuxgeneric | 3.11 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
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.
Quoted source text, attributed separately from HOL analysis.