Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: RDMA/rtrs-srv: Fix integer underflow in process_read and process_write usr_len is read from a network-supplied message field (le16_to_cpu) and used to compute data_len = off - usr_len without validating that usr_len <= off. A malicious RDMA client can send usr_len > off causing an integer underflow, resulting in data_len wrapping to a huge size_t value which is then passed to the rdma_ev callback as a memory length, leading to out-of-bounds memory access. Fix by reading and validating usr_len <= off before rtrs_srv_get_ops_ids() in both process_read() and process_write(), ensuring the early return path acquires no reference and has no resource leak.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9cb837480424e78ed585376f944088246685aec3 before 6b1e26e70d7ca9f0906af2283558a530eeb1f066; affected 9cb837480424e78ed585376f944088246685aec3 before 2c52b2afded988233cd4ccc185cf5147bbc77a76; affected 9cb837480424e78ed585376f944088246685aec3 before b042b4947752df0b3d16e683ac09fb4f7f0e33e0; affected 9cb837480424e78ed585376f944088246685aec3 before 24ad03bfeda05fca04c56677e57fd3d6bc3e9978; affected 9cb837480424e78ed585376f944088246685aec3 before c76e9123ab91a903396d26e6ab1b5caae5c6b149; affected 9cb837480424e78ed585376f944088246685aec3 before 54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5 |
| Linux / Linux | affected 5.8; unaffected 0 before 5.8; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6b1e26e70d7ca9f0906af2283558a530eeb1f066
- https://git.kernel.org/stable/c/2c52b2afded988233cd4ccc185cf5147bbc77a76
- https://git.kernel.org/stable/c/b042b4947752df0b3d16e683ac09fb4f7f0e33e0
- https://git.kernel.org/stable/c/24ad03bfeda05fca04c56677e57fd3d6bc3e9978
- https://git.kernel.org/stable/c/c76e9123ab91a903396d26e6ab1b5caae5c6b149
- https://git.kernel.org/stable/c/54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5