High severity7.8NVD Advisory· Published Sep 24, 2026· Updated Oct 3, 2026
CVE-2026-97421
CVE-2026-97421
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
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2Patches
Vulnerability mechanics
References
6- git.kernel.org/stable/c/09ea6837a0434fb4db99528a5055b6d822135dcfnvd
- git.kernel.org/stable/c/3014da7587ce006cd08004fd6b257626b314e0a3nvd
- git.kernel.org/stable/c/5fc5b73109540809b094710fac44da81dd8a3ff8nvd
- git.kernel.org/stable/c/ae3cf7d2c4d506c5c91746321644e1a08d989e2anvd
- git.kernel.org/stable/c/ddccf6cc3861de2fe60986933bead79220e0d797nvd
- git.kernel.org/stable/c/e9bbb5f5349ef560ff6f0395564f04c3aa664559nvd
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