CVE-2026-52908
RDMA: During rereg_mr ensure that REREG_ACCESS is compatible
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible If IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be re-evaluated to ensure it is properly pinned as RW. Since the umem is hidden inside each driver's mr struct add a ib_umem_check_rereg() function that each driver has to call before processing IB_MR_REREG_ACCESS. mlx4 has to retain its duplicate ib_access_writable check because it implements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items in place sequentially while the MR is live, so it will continue to not support this combination.
INFO
Published Date :
June 19, 2026, 2 p.m.
Last Modified :
June 19, 2026, 2 p.m.
Remotely Exploit :
No
Source :
Linux
Affected Products
The following products are affected by CVE-2026-52908
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Apply the RDMA fix to the Linux kernel.
- Ensure REREG_ACCESS compatibility in drivers.
- Update IB_MR_REREG_ACCESS flags as needed.
- Retain mlx4-specific checks if applicable.
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