CVE-2026-90151 | In the Linux kernel, the following vulnerability has been resolved: NFSv4: remove callback IDR entry on client allocation failure nfs4_alloc_client() allocates an NFSv4.0 callback identifier before it finishes setting up the client. If any later initialization step fails, the error path frees the nfs_client directly with nfs_free_client(). That bypasses nfs_put_client(), which is where the callback IDR entry is removed during normal teardown. A failed allo
In the Linux kernel, the following vulnerability has been resolved:
NFSv4: remove callback IDR entry on client allocation failure
nfs4_alloc_client() allocates an NFSv4.0 callback identifier before it
finishes setting up the client. If any later initialization step fails,
the error path frees the nfs_client directly with nfs_free_client(). That
bypasses nfs_put_client(), which is where the callback IDR entry is
removed during normal teardown.
A failed allocation can therefore leave cb_ident_idr pointing at a freed
nfs_client. A later NFSv4.0 callback lookup by cb_ident would find the
stale pointer and take a reference to it.
Make the callback IDR removal helper callable by the allocation failure
path, and remove the callback identifier before freeing the client.
This was found by a local static-analysis checker for publish-before-free
lifetime bugs and confirmed by manual inspection.
- 🔗 git.kernel.org/stable/c/68c721391b761dbe38d5b0094d2bb6e8…
- 🔗 git.kernel.org/stable/c/9bfdd0f591307b5198826a0e7a5b2f35…
- 🔗 git.kernel.org/stable/c/7c4812eb96bdcafb31a65b12f2aa9665…
- 🔗 git.kernel.org/stable/c/fc95ca82d5ae598c428ab5a00ae69f85…
- 🔗 git.kernel.org/stable/c/80b1c3d5a881f7d9081aa9f46da97428…
- 🔗 git.kernel.org/stable/c/3f2387e8bfbc4efda5d77c3a11a028d0…
- 🔗 git.kernel.org/stable/c/5891c03e150920618db0e9c4ea2d772a…
- 🔗 git.kernel.org/stable/c/d05c2007b3d84ccba11dc6e9cb320276…
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CVE-2026-90151 | In the Linux kernel, the following vulnerability has been resolved: NFSv4: remove callback IDR entry on client allocation failure nfs4_alloc_client() allocates an NFSv4.0 callback identifier before it finishes setting up the client. If any later initialization step fails, the error path frees the nfs_client directly with nfs_free_client(). That bypasses nfs_put_client(), which is where the callback IDR entry is removed during normal teardown. A failed allo
In the Linux kernel, the following vulnerability has been resolved: NFSv4: remove callback IDR entry on client allocation failure nfs4_alloc_client() allocates an NFSv4.0 callback identifier before it finishes setting up the client. If an