CVE-2026-52908High· 7.8▾ TwilightIn 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 …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.1%
Last analysed / modified upstream
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.
Linux >= b40656aa7d559adc1fe689396dc58b92a9a27286 < 09dc18894148381d3bfc550083b1236043870dceLinux >= b40656aa7d559adc1fe689396dc58b92a9a27286 < eba5df21eda0fe7418efbea2f799f8ea1b8ca94cLinux >= b40656aa7d559adc1fe689396dc58b92a9a27286 < 2904e985a2917b5dac65df82733065e78a65fc9dLinux >= b40656aa7d559adc1fe689396dc58b92a9a27286 < 50334a05a950840b39a1ce3d2a173b4183db9b3eLinux >= b40656aa7d559adc1fe689396dc58b92a9a27286 < badad6fad60def1b9805559dd81dbab3d97b82aaLinux 6.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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