CVE-2026-52908
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.
Affected versions
Linux kernel versions
6.2
and later are affected. Fixed in
6.6.143,
6.12.94,
6.18.36,
7.0.13,
7.1
and their respective stable series.
References
5 totalFrequently asked questions
-
What is CVE-2026-52908?
CVE-2026-52908 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.2 onward and has been patched in 6.6.143, 6.12.94, 6.18.36 and others. CVE-2026-52908 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2026-52908?
Yes — CVE-2026-52908 has been patched. Fixed versions include 6.6.143, 6.12.94, 6.18.36 and others. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2026-52908 actively exploited?
No — CVE-2026-52908 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.