In the Linux kernel, the following vulnerability has been resolved:
mlxsw: fix refcount leak in mlxsw_sp_vrs_lpm_tree_replace()
When mlxsw_sp_vrs_lpm_tree_replace() fails after replacing some VRs,
the error rollback loop does not correctly revert the preceding
replacements. The loop decrements the index but fails to update the
vr pointer, which still points to the VR that caused the failure. As
a result, the condition and the rollback call always operate on the
same VR, potentially calling mlxsw_sp_vr_lpm_tree_replace() multiple
times on it while never rolling back the earlier VRs. Those VRs
continue to hold a reference to new_tree acquired via
mlxsw_sp_lpm_tree_hold(), leaking the reference count of new_tree.
Fix by reinitializing vr inside the error loop with the updated index:
vr = &mlxsw_sp->router->vrs[i];
so that the loop correctly iterates over all VRs that were actually
replaced.
CVSS
No CVSS.
References
Configurations
No configuration.
History
No history.
Information
Published : 2026-08-15 06:22
Updated : 2026-08-17 06:18
NVD link : CVE-2026-72307
Mitre link : CVE-2026-72307
CVE.ORG link : CVE-2026-72307
JSON object : View
Products Affected
No product.
CWE
No CWE.