Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ipc: fix to protect IPCS lookups using RCU syzbot reported that it discovered a use-after-free vulnerability, [0] [0]: https://lore.kernel.org/all/67af13f8.050a0220.21dd3.0038.GAE@google.com/ idr_for_each() is protected by rwsem, but this is not enough. If it is not protected by RCU read-critical region, when idr_for_each() calls radix_tree_node_free() through call_rcu() to free the radix_tree_node structure, the node will be freed immediately, and when reading the next node in radix_tree_for_each_slot(), the already freed memory may be read. Therefore, we need to add code to make sure that idr_for_each() is protected within the RCU read-critical region when we call it in shm_destroy_orphaned().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b34a6b1da371ed8af1221459a18c67970f7e3d53 before 5f1e1573bf103303944fd7225559de5d8297539c; affected b34a6b1da371ed8af1221459a18c67970f7e3d53 before b968ba8bfd9f90914957bbbd815413bf6a98eca7; affected b34a6b1da371ed8af1221459a18c67970f7e3d53 before 74bc813d11c30e28fc5261dc877cca662ccfac68; affected b34a6b1da371ed8af1221459a18c67970f7e3d53 before 78297d53d3878d43c1d627d20cd09f611fa4b91d; affected b34a6b1da371ed8af1221459a18c67970f7e3d53 before 5180561afff8e0f029073c8c8117c95c6512d1f9; affected b34a6b1da371ed8af1221459a18c67970f7e3d53 before 68c173ea138b66d7dd1fd980c9bc578a18e11884; affected b34a6b1da371ed8af1221459a18c67970f7e3d53 before b0b6bf90ce2699a574b3683e22c44d0dcdd7a057; affected b34a6b1da371ed8af1221459a18c67970f7e3d53 before d66adabe91803ef34a8b90613c81267b5ded1472 |
| Linux / Linux | affected 3.1; unaffected 0 before 3.1; unaffected 5.4.295 through 5.4.*; unaffected 5.10.239 through 5.10.*; unaffected 5.15.186 through 5.15.*; unaffected 6.1.142 through 6.1.*; unaffected 6.6.95 through 6.6.*; unaffected 6.12.35 through 6.12.*; unaffected 6.15.4 through 6.15.*; unaffected 6.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5f1e1573bf103303944fd7225559de5d8297539c
- https://git.kernel.org/stable/c/b968ba8bfd9f90914957bbbd815413bf6a98eca7
- https://git.kernel.org/stable/c/74bc813d11c30e28fc5261dc877cca662ccfac68
- https://git.kernel.org/stable/c/78297d53d3878d43c1d627d20cd09f611fa4b91d
- https://git.kernel.org/stable/c/5180561afff8e0f029073c8c8117c95c6512d1f9
- https://git.kernel.org/stable/c/68c173ea138b66d7dd1fd980c9bc578a18e11884
- https://git.kernel.org/stable/c/b0b6bf90ce2699a574b3683e22c44d0dcdd7a057
- https://git.kernel.org/stable/c/d66adabe91803ef34a8b90613c81267b5ded1472
ADP enrichment
No English description supplied.
No English description supplied.
No English description supplied.
No references supplied.