{"id":"CVE-2026-92507","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix potential use after free in ib_dealloc_pd_user()\n\nWhen accessing a PD via the netlink path the only synchronization\nmechanism for the said PD is rdma_res…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix potential use after free in ib_dealloc_pd_user()\n\nWhen accessing a PD via the netlink path the only synchronization\nmechanism for the said PD is rdma_res…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 91a7c58fce065506fd98954d27694e5d83c96638 < df0e9efe61ca706a07b1c9bf93fcb9032455efc4","Linux >= 91a7c58fce065506fd98954d27694e5d83c96638 < 7647363fa02046da681acc3c827d9f301c06e0e7","Linux >= 91a7c58fce065506fd98954d27694e5d83c96638 < d9c0daf9362aad2aeed1d9c5536d108772a8d31c","Linux >= 91a7c58fce065506fd98954d27694e5d83c96638 < 66d65f36d39759e9f62dc746dc71d862f20f827f","Linux >= 91a7c58fce065506fd98954d27694e5d83c96638 < c06f2856a1d7e75a5ff247fc05224aa2452e7265","Linux >= 91a7c58fce065506fd98954d27694e5d83c96638 < 8b90e701342275f414e36e7421c502237df241ad","Linux 5.10"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:18:13.340","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92507","references":[{"url":"https://git.kernel.org/stable/c/66d65f36d39759e9f62dc746dc71d862f20f827f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7647363fa02046da681acc3c827d9f301c06e0e7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8b90e701342275f414e36e7421c502237df241ad","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c06f2856a1d7e75a5ff247fc05224aa2452e7265","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d9c0daf9362aad2aeed1d9c5536d108772a8d31c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/df0e9efe61ca706a07b1c9bf93fcb9032455efc4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00171,"epssPercentile":0.05663,"ingestedAt":"2026-09-17T16:21:47.780Z","slug":"CVE-2026-92507","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix potential use after free in ib_dealloc_pd_user()\n\nWhen accessing a PD via the netlink path the only synchronization\nmechanism for the said PD is rdma_restrack_get().\nCurrently, rdma_restrack_del() is invoked at the end of\nib_dealloc_pd_user(), which is too late, since by that point\nvendor-specific resources associated with the PD might already be\nfreed. This can leave a short window where the PD remains accessible\nthrough restrack, leading to a potential use-after-free.\n\nFix this by moving the rdma_restrack_begin_del() call to the start of\nib_dealloc_pd_user(), ensuring that the PD is removed from restrack\nbefore its internal resources are released. This guarantees that no new\nusers hold references to a PD that is in the process of destruction.\n\nIn addition, this change preserves the intended inverted order\nbetween create and destroy routines: resources are added to\nrestrack at the end of successful creation, and hence shall be removed\nfrom the restrack first thing during the destruction flow, which keeps\nthe lifecycle management consistent and predictable.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207335,"id":"CVE-2026-92507","ts":1789757340949,"field":"cvss","old":null,"new":"7.8"},{"seq":207334,"id":"CVE-2026-92507","ts":1789757340949,"field":"severity","old":"none","new":"high"}]}