CVE-2026-80880 is a vulnerability in Linux Kernel
Published on September 4, 2026
IB/mlx5: Properly support implicit ODP rereg_mr
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.
Products Associated with CVE-2026-80880
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Affected Versions
Linux:- Version ef3642c4f54d3493c92c71faf46139b2473bc532 and below cbc9982c8573fb9e35040063aa78c8ebe768a1ff is affected.
- Version ef3642c4f54d3493c92c71faf46139b2473bc532 and below ee914ef54a7e707453ecb43eb30fb0a5c6dd0d69 is affected.
- Version ef3642c4f54d3493c92c71faf46139b2473bc532 and below 94f7e50eb6b2ce7fbd9aeac1db22460d2013a3fb is affected.
- Version ef3642c4f54d3493c92c71faf46139b2473bc532 and below eb7cb798e563b3f3b3baeb9cc6f7455764267e50 is affected.
- Version ef3642c4f54d3493c92c71faf46139b2473bc532 and below d4f84bfa089fe71f775d25beb29303e844494c25 is affected.
- Version ef3642c4f54d3493c92c71faf46139b2473bc532 and below 5d02b9a2efd11d28d2a8feac7769686b1b871d9c is affected.
- Version ef3642c4f54d3493c92c71faf46139b2473bc532 and below ee7a8335069150c3f1893a697ab30bbeca00d796 is affected.
- Version 5.11 is affected.
- Before 5.11 is unaffected.
- Version 5.15.212, <= 5.15.* is unaffected.
- Version 6.1.178, <= 6.1.* is unaffected.
- Version 6.6.145, <= 6.6.* is unaffected.
- Version 6.12.97, <= 6.12.* is unaffected.
- Version 6.18.40, <= 6.18.* is unaffected.
- Version 7.1.5, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.