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HighFix available

RDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz()

Type: advisorySources: OSV

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

Products
Kernel
Affected versions
Not specified
Fixed versions
5.15.222, 6.1.189, 6.12.111, 6.18.53, 6.6.158
CVEs
CVE-2026-97421
Confirmed fixed CVEs
Not specified
Updated in this feed
4 Nov 2026, 13:24 UTC · Revision 1

Source evidence

RDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz()

core-osv · Original source

Published 24 Sept 2026, 16:03 UTC

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

osv:CVE-2026-97421

Kernel

Fixed versions: 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53

Complete source record
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  "url": "https://osv.dev/vulnerability/CVE-2026-97421",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "RDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz()",
    "summary": "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",
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  "published_at": "2026-09-24T16:03:31.505+00:00"
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