CVE-2026-92507

CVE CVE-2026-92507EUVD EUVD-2026-82128Published 2026-09-17T16:10:18.000ZLast changed 2026-09-18T17:55:30.000ZCVSS 7.8

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.3-rc1; 91a7c58fce065506fd98954d27694e5d83c96638 <d9c0daf9362aad2aeed1d9c5536d108772a8d31c; patch: 6.6.157; 91a7c58fce065506fd98954d27694e5d83c96638 <c06f2856a1d7e75a5ff247fc05224aa2452e7265; patch: 7.2.6; 91a7c58fce065506fd98954d27694e5d83c96638 <df0e9efe61ca706a07b1c9bf93fcb9032455efc4; 5.10; patch: 6.12.110; 91a7c58fce065506fd98954d27694e5d83c96638 <66d65f36d39759e9f62dc746dc71d862f20f827f; patch: 6.18.52; patch: 6.1.188; patch: 0; 91a7c58fce065506fd98954d27694e5d83c96638 <8b90e701342275f414e36e7421c502237df241ad; 91a7c58fce065506fd98954d27694e5d83c96638 <7647363fa02046da681acc3c827d9f301c06e0e7

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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