Answer in brief
CVE-2026-90435 records a High severity (CVSS 7.8) 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.
CVSS is 7.8. 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
Oct 19, 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.