CVE-2026-97421RDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz()
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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
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from a40c20dabdf9045270767c75918feb67f0727c89 before 3014da7587ce006cd08004fd6b257626b314e0a3; from a40c20dabdf9045270767c75918feb67f0727c89 before ddccf6cc3861de2fe60986933bead79220e0d797; from a40c20dabdf9045270767c75918feb67f0727c89 before e9bbb5f5349ef560ff6f0395564f04c3aa664559; from a40c20dabdf9045270767c75918feb67f0727c89 before ae3cf7d2c4d506c5c91746321644e1a08d989e2a; from a40c20dabdf9045270767c75918feb67f0727c89 before 5fc5b73109540809b094710fac44da81dd8a3ff8; from a40c20dabdf9045270767c75918feb67f0727c89 before 09ea6837a0434fb4db99528a5055b6d822135dcf; 85e40ba1c4a5246b35e91c2ed69d4680426904d7; 59f07434b297e2268f5d5c567db5b09145245cf1; and 4 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/3014da7587ce006cd08004fd6b257626b314e0a3
- https://git.kernel.org/stable/c/ddccf6cc3861de2fe60986933bead79220e0d797
- https://git.kernel.org/stable/c/e9bbb5f5349ef560ff6f0395564f04c3aa664559
- https://git.kernel.org/stable/c/ae3cf7d2c4d506c5c91746321644e1a08d989e2a
- https://git.kernel.org/stable/c/5fc5b73109540809b094710fac44da81dd8a3ff8
- https://git.kernel.org/stable/c/09ea6837a0434fb4db99528a5055b6d822135dcf
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.