CVE-2026-64054

Summary

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

net: shaper: reject duplicate leaves in GROUP request

net_shaper_nl_group_doit() does not deduplicate NET_SHAPER_A_LEAVES entries. When userspace supplies the same leaf handle twice, the same old-parent pointer lands twice in old_nodes[]. The cleanup loop double frees the parent. Of course the same parent may still be in old_nodes[] twice if we are moving multiple of its leaves.

Note that this patch also implicitly fixes the fact that the i >= leaves_count path forgets to set ret.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5d5d4700e75d861e83bf18eb6bf66ff90f85fe4e < 5098b223f0f0c5c18a3884a8b0ea5bd4a0c7bd75affected
LinuxLinux5d5d4700e75d861e83bf18eb6bf66ff90f85fe4e < 31767bf852b59f05125b58a17007e4cd1ea9eb2eaffected
LinuxLinux5d5d4700e75d861e83bf18eb6bf66ff90f85fe4e < a9a2fa1da619f276580b0d4c5d12efac89e8642baffected
LinuxLinux6.13affected
LinuxLinux0 < 6.13unaffected
LinuxLinux6.18.34 <= 6.18.*unaffected
LinuxLinux7.0.11 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References