CVE-2026-80880 PUBLISHED

IB/mlx5: Properly support implicit ODP rereg_mr

Assigner: Linux
Reserved: 26.08.2026 Published: 04.09.2026 Updated: 04.09.2026

In the Linux kernel, the following vulnerability has been resolved:

IB/mlx5: Properly support implicit ODP rereg_mr

Due to all the child mkeys in the implicit ODP configuration we cannot change anything in place for the parent mkey. Instead the whole thing needs to be rebuilt if any change is requested. If the user does not specify a translation then force the implicit values which will then fall through the logic into mlx5_ib_reg_user_mr() to allocate a completely new MR.

Since implicit children were also touching the mr->pd, this removes another case where the access was racy.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from ef3642c4f54d3493c92c71faf46139b2473bc532 to cbc9982c8573fb9e35040063aa78c8ebe768a1ff (excl.)
  • affected from ef3642c4f54d3493c92c71faf46139b2473bc532 to ee914ef54a7e707453ecb43eb30fb0a5c6dd0d69 (excl.)
  • affected from ef3642c4f54d3493c92c71faf46139b2473bc532 to 94f7e50eb6b2ce7fbd9aeac1db22460d2013a3fb (excl.)
  • affected from ef3642c4f54d3493c92c71faf46139b2473bc532 to eb7cb798e563b3f3b3baeb9cc6f7455764267e50 (excl.)
  • affected from ef3642c4f54d3493c92c71faf46139b2473bc532 to d4f84bfa089fe71f775d25beb29303e844494c25 (excl.)
  • affected from ef3642c4f54d3493c92c71faf46139b2473bc532 to 5d02b9a2efd11d28d2a8feac7769686b1b871d9c (excl.)
  • affected from ef3642c4f54d3493c92c71faf46139b2473bc532 to ee7a8335069150c3f1893a697ab30bbeca00d796 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.11 is affected
  • unaffected from 0 to 5.11 (excl.)
  • unaffected from 5.15.212 to 5.15.* (incl.)
  • unaffected from 6.1.178 to 6.1.* (incl.)
  • unaffected from 6.6.145 to 6.6.* (incl.)
  • unaffected from 6.12.97 to 6.12.* (incl.)
  • unaffected from 6.18.40 to 6.18.* (incl.)
  • unaffected from 7.1.5 to 7.1.* (incl.)
  • unaffected from 7.2 to * (incl.)

References