RDMA/srpt: fix integer overflow in immediate data length check

Summary

In the Linux kernel, the following vulnerability has been resolved: RDMA/srpt: fix integer overflow in immediate data length check imm_buf->len is a user-controlled uint32_t received from the network. Adding it to imm_data_offset without overflow checking allows a malicious initiator to send len=0xFFFFFFFF, causing req_size to wrap around to a small value, bypassing the bounds check, and subsequently passing a ~4GB length to sg_init_one(). Use check_add_overflow() to detect wrapping before the comparison.

Timeline

1. Aug 15, 2026, 5:59 AM UTCCVE published
2. Oct 16, 2026, 6:55 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: total

3. Oct 16, 2026, 7:05 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 · fixed in c82c860f8c8e4f4f454c9f14d0ad0c0466965f7d; From 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 · fixed in 3efa5301137140a3ca3677a9098c0a93a0acfd49; From 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 · fixed in 067b9556eeb007f28b7c2033b4dcde5b6d88418f; From 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 · fixed in dcf7a986f377cce0749ed53f1d64195fbd5fdf91; From 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 · fixed in 07dec3f6dcb6c6cc891162d252b800eb0e6d5e8e; From 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 · fixed in 65572fbd86033ae2370125593d59b8be34253aaf; From 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 · fixed in 72497172a4799119a0282a5eb5e2b8ddcc821921; From 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 · fixed in eb4ecdf631fe00e8020bf461503cb9b7017ed796

• Linux Linux

  5.0

• KernelLinux

  From 5.0.0 · fixed in 5.10.261; From 5.11.0 · fixed in 5.15.212; From 5.16.0 · fixed in 6.1.178; From 6.2.0 · fixed in 6.6.145; From 6.7.0 · fixed in 6.12.97; From 6.13.0 · fixed in 6.18.40; From 6.19.0 · fixed in 7.1.5

References 8