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.
References
Configurations
Configuration 1 (hide)
|
History
09 Dec 2024, 18:24
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-416 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/3093ee182f01689b89e9f8797b321603e5de4f63 - Patch | |
| References | () https://git.kernel.org/stable/c/30b9e92d0b5e5d5dc1101ab856c17009537cbca4 - Patch | |
| References | () https://git.kernel.org/stable/c/3e22b88e02c194f6c80867abfef5cc09383461f4 - Patch | |
| References | () https://git.kernel.org/stable/c/608a4b90ece039940e9425ee2b39c8beff27e00c - Patch | |
| References | () https://git.kernel.org/stable/c/ad9ce7188432650469a6c7625bf479f5ed0b6155 - Patch |
Information
Published : 2024-02-28 09:15
Updated : 2024-12-09 18:24
NVD link : CVE-2021-47012
Mitre link : CVE-2021-47012
CVE.ORG link : CVE-2021-47012
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free