Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
99fa331dc8629be55ac7a0cca0dc56492070ddac to < 5eb0c57a8b568eb08f464861d84d518a2af939acaffected99fa331dc8629be55ac7a0cca0dc56492070ddac to < d5cc211e8c39e46f357d30a092d683e84d560de9affected99fa331dc8629be55ac7a0cca0dc56492070ddac to < 2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5baffected99fa331dc8629be55ac7a0cca0dc56492070ddac to < 8c013e3a8d8273da4d47bf1c27f016a3551996f5affected99fa331dc8629be55ac7a0cca0dc56492070ddac to < 64c72390d8407ea86de712a477c796b07d37abc4affected99fa331dc8629be55ac7a0cca0dc56492070ddac to < 235ef2d0e750885c29340b0fc40620a7a4f52e12affected
Linux Linux
Default version status: affected
5.3affected0 to < 5.3unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/5eb0c57a8b568eb08f464861d84d518a2af939ac ↗
- https://git.kernel.org/stable/c/d5cc211e8c39e46f357d30a092d683e84d560de9 ↗
- https://git.kernel.org/stable/c/2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b ↗
- https://git.kernel.org/stable/c/8c013e3a8d8273da4d47bf1c27f016a3551996f5 ↗
- https://git.kernel.org/stable/c/64c72390d8407ea86de712a477c796b07d37abc4 ↗
- https://git.kernel.org/stable/c/235ef2d0e750885c29340b0fc40620a7a4f52e12 ↗