CVE-2026-80880

Unknown

Last modified

CVE-2026-80880 is a vulnerability of currently unknown severity. 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.

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= ef3642c4f54d3493c92c71faf46139b2473bc532, < cbc9982c8573fb9e35040063aa78c8ebe768a1ff; >= ef3642c4f54d3493c92c71faf46139b2473bc532, < ee914ef54a7e707453ecb43eb30fb0a5c6dd0d69; >= ef3642c4f54d3493c92c71faf46139b2473bc532, < 94f7e50eb6b2ce7fbd9aeac1db22460d2013a3fb; >= ef3642c4f54d3493c92c71faf46139b2473bc532, < eb7cb798e563b3f3b3baeb9cc6f7455764267e50; >= ef3642c4f54d3493c92c71faf46139b2473bc532, < d4f84bfa089fe71f775d25beb29303e844494c25; >= ef3642c4f54d3493c92c71faf46139b2473bc532, < 5d02b9a2efd11d28d2a8feac7769686b1b871d9c; >= ef3642c4f54d3493c92c71faf46139b2473bc532, < ee7a8335069150c3f1893a697ab30bbeca00d796
LinuxLinux5.11

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-80880?
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.
How severe is CVE-2026-80880?
Severity scoring for CVE-2026-80880 is pending analysis.
How do I fix CVE-2026-80880?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST