Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz() Several corner cases, especially important on 32 bits: - umem->iova is u64, the function argument should pass in u64 or iova will be truncated - Check that the length is not too large for the iova - Check that lengths > 4G don't overflow the GENMASK
References6
- git.kernel.org/stable/c/09ea6837a0434fb4db99528a5055b6d822135dcf
- git.kernel.org/stable/c/3014da7587ce006cd08004fd6b257626b314e0a3
- git.kernel.org/stable/c/5fc5b73109540809b094710fac44da81dd8a3ff8
- git.kernel.org/stable/c/ae3cf7d2c4d506c5c91746321644e1a08d989e2a
- git.kernel.org/stable/c/ddccf6cc3861de2fe60986933bead79220e0d797
- git.kernel.org/stable/c/e9bbb5f5349ef560ff6f0395564f04c3aa664559
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 9 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.