CVE-2026-97413RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 9cb837480424e78ed585376f944088246685aec3 builds before 6b1e26e70d7ca9f0906af2283558a530eeb1f066; 9cb837480424e78ed585376f944088246685aec3 builds before 2c52b2afded988233cd4ccc185cf5147bbc77a76; from 9cb837480424e78ed585376f944088246685aec3 before b042b4947752df0b3d16e683ac09fb4f7f0e33e0; from 9cb837480424e78ed585376f944088246685aec3 before 24ad03bfeda05fca04c56677e57fd3d6bc3e9978; from 9cb837480424e78ed585376f944088246685aec3 before c76e9123ab91a903396d26e6ab1b5caae5c6b149; from 9cb837480424e78ed585376f944088246685aec3 before 54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5 | CNA record |
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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.