Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Fix a use after free in siw_alloc_mr Our code analyzer reported a UAF. In siw_alloc_mr(), it calls siw_mr_add_mem(mr,..). In the implementation of siw_mr_add_mem(), mem is assigned to mr->mem and then mem is freed via kfree(mem) if xa_alloc_cyclic() failed. Here, mr->mem still point to a freed object. After, the execution continue up to the err_out branch of siw_alloc_mr, and the freed mr->mem is used in siw_mr_drop_mem(mr). My patch moves "mr->mem = mem" behind the if (xa_alloc_cyclic(..)<0) {} section, to avoid the uaf.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 2251334dcac9eb337575d8767e2a6a7e81848f7f before 30b9e92d0b5e5d5dc1101ab856c17009537cbca4; affected 2251334dcac9eb337575d8767e2a6a7e81848f7f before 608a4b90ece039940e9425ee2b39c8beff27e00c; affected 2251334dcac9eb337575d8767e2a6a7e81848f7f before 3e22b88e02c194f6c80867abfef5cc09383461f4; affected 2251334dcac9eb337575d8767e2a6a7e81848f7f before ad9ce7188432650469a6c7625bf479f5ed0b6155; affected 2251334dcac9eb337575d8767e2a6a7e81848f7f before 3093ee182f01689b89e9f8797b321603e5de4f63 |
| Linux / Linux | affected 5.3; unaffected 0 before 5.3; unaffected 5.4.119 through 5.4.*; unaffected 5.10.37 through 5.10.*; unaffected 5.11.21 through 5.11.*; unaffected 5.12.4 through 5.12.*; unaffected 5.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/30b9e92d0b5e5d5dc1101ab856c17009537cbca4
- https://git.kernel.org/stable/c/608a4b90ece039940e9425ee2b39c8beff27e00c
- https://git.kernel.org/stable/c/3e22b88e02c194f6c80867abfef5cc09383461f4
- https://git.kernel.org/stable/c/ad9ce7188432650469a6c7625bf479f5ed0b6155
- https://git.kernel.org/stable/c/3093ee182f01689b89e9f8797b321603e5de4f63
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/30b9e92d0b5e5d5dc1101ab856c17009537cbca4
- https://git.kernel.org/stable/c/608a4b90ece039940e9425ee2b39c8beff27e00c
- https://git.kernel.org/stable/c/3e22b88e02c194f6c80867abfef5cc09383461f4
- https://git.kernel.org/stable/c/ad9ce7188432650469a6c7625bf479f5ed0b6155
- https://git.kernel.org/stable/c/3093ee182f01689b89e9f8797b321603e5de4f63