Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f4eecd5da3422e82e88e36c33cbd2595eebcacb1 before 68c721391b761dbe38d5b0094d2bb6e8489ad92b; affected f4eecd5da3422e82e88e36c33cbd2595eebcacb1 before 9bfdd0f591307b5198826a0e7a5b2f35f87acd2d; affected f4eecd5da3422e82e88e36c33cbd2595eebcacb1 before 7c4812eb96bdcafb31a65b12f2aa96659429d1d4; affected f4eecd5da3422e82e88e36c33cbd2595eebcacb1 before fc95ca82d5ae598c428ab5a00ae69f8526d59371; affected f4eecd5da3422e82e88e36c33cbd2595eebcacb1 before 80b1c3d5a881f7d9081aa9f46da9742878a0f893; affected f4eecd5da3422e82e88e36c33cbd2595eebcacb1 before 3f2387e8bfbc4efda5d77c3a11a028d0a119c48f; affected f4eecd5da3422e82e88e36c33cbd2595eebcacb1 before 5891c03e150920618db0e9c4ea2d772abacdcfd1; affected f4eecd5da3422e82e88e36c33cbd2595eebcacb1 before d05c2007b3d84ccba11dc6e9cb3202768cc72f14 |
| Linux / Linux | affected 2.6.38; unaffected 0 before 2.6.38; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/68c721391b761dbe38d5b0094d2bb6e8489ad92b
- https://git.kernel.org/stable/c/9bfdd0f591307b5198826a0e7a5b2f35f87acd2d
- https://git.kernel.org/stable/c/7c4812eb96bdcafb31a65b12f2aa96659429d1d4
- https://git.kernel.org/stable/c/fc95ca82d5ae598c428ab5a00ae69f8526d59371
- https://git.kernel.org/stable/c/80b1c3d5a881f7d9081aa9f46da9742878a0f893
- https://git.kernel.org/stable/c/3f2387e8bfbc4efda5d77c3a11a028d0a119c48f
- https://git.kernel.org/stable/c/5891c03e150920618db0e9c4ea2d772abacdcfd1
- https://git.kernel.org/stable/c/d05c2007b3d84ccba11dc6e9cb3202768cc72f14