In the Linux kernel, the following vulnerability has been resolved:
RDMA/core: Fix potential use after free in ib_dealloc_pd_user()
When accessing a PD via the netlink path the only synchronization mechanism for the said PD is rdma_restrack_get(). Currently, rdma_restrack_del() is invoked at the end of ib_dealloc_pd_user(), which is too late, since by that point vendor-specific resources associated with the PD might already be freed. This can leave a short window where the PD remains accessible through restrack, leading to a potential use-after-free.
Fix this by moving the rdma_restrack_begin_del() call to the start of ib_dealloc_pd_user(), ensuring that the PD is removed from restrack before its internal resources are released. This guarantees that no new users hold references to a PD that is in the process of destruction.
In addition, this change preserves the intended inverted order between create and destroy routines: resources are added to restrack at the end of successful creation, and hence shall be removed from the restrack first thing during the destruction flow, which keeps the lifecycle management consistent and predictable.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.18-tools-debuginfoUpgrade perf6.18Upgrade python3-perf-debuginfoUpgrade perf6.18-debuginfoUpgrade bpftool-debuginfoUpgrade kernel6.18-tools-develUpgrade python3-perf6.18-debuginfoUpgrade python3-perf6.18Upgrade kernel6.18-modules-extra-commonUpgrade kernel-headersUpgrade microvm-kernel6.18Upgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade bpftool6.18-debuginfoUpgrade kernel6.18-modules-extraUpgrade kernelUpgrade bpftool6.18Upgrade perfUpgrade kernel6.18-develUpgrade kernel-livepatch-6.1.188-233.385Upgrade bpftoolUpgrade kernel-tools-develUpgrade kernel6.18-debuginfo-common-aarch64Upgrade kernel-modules-extraUpgrade kernel6.18-debuginfoUpgrade kernel-develUpgrade perf-debuginfoUpgrade kernel6.18Upgrade python3-perfUpgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-6.18.54-121.166Upgrade kernel6.18-toolsUpgrade kernel6.18-headersUpgrade kernel-modules-extra-commonUpgrade kernel-tools | Oct 13, 2026 | Sep 17, 2026 |
| Debian | — | Upgrade linuxUpgrade linux-6.12 | Sep 30, 2026 | Sep 17, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 30, 2026 | Sep 17, 2026 |
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