CVE-2026-92509 (GCVE-0-2026-92509)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:10 – Updated: 2026-10-19 09:04
VLAI
Title
RDMA/core: Fix potential use after free in counter_release()
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Fix potential use after free in counter_release() When accessing a counter via the netlink path the only synchronization mechanism for the said counter is rdma_restrack_get(). Currently, rdma_restrack_del() is invoked at the end of counter_release(), which is too late, since by that point vendor-specific resources associated with the counter might already be freed. This can leave a short window where the counter remains accessible through restrack, leading to a potential use-after-free. Fix this by moving the rdma_restrack_del() call to be before the freeing of the vendor-specific resources, ensuring that the counter is removed from restrack before its internal resources are released. This guarantees that no new users hold references to a counter that is in the process of destruction.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6794 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 99fa331dc8629be55ac7a0cca0dc56492070ddac , < 5eb0c57a8b568eb08f464861d84d518a2af939ac (git)
Affected: 99fa331dc8629be55ac7a0cca0dc56492070ddac , < d5cc211e8c39e46f357d30a092d683e84d560de9 (git)
Affected: 99fa331dc8629be55ac7a0cca0dc56492070ddac , < 2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b (git)
Affected: 99fa331dc8629be55ac7a0cca0dc56492070ddac , < 8c013e3a8d8273da4d47bf1c27f016a3551996f5 (git)
Affected: 99fa331dc8629be55ac7a0cca0dc56492070ddac , < 64c72390d8407ea86de712a477c796b07d37abc4 (git)
Affected: 99fa331dc8629be55ac7a0cca0dc56492070ddac , < 235ef2d0e750885c29340b0fc40620a7a4f52e12 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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}



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