What’s Vulnerable › Vulnerabilities

CVE-2026-74394: RDMA/srpt: fix integer overflow in immediate data length check

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

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.

Affected products

• Linux kernel: 5.0 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/067b9556eeb007f28b7c2033b4dcde5b6d88418f
• https://git.kernel.org/stable/c/07dec3f6dcb6c6cc891162d252b800eb0e6d5e8e
• https://git.kernel.org/stable/c/3efa5301137140a3ca3677a9098c0a93a0acfd49
• https://git.kernel.org/stable/c/65572fbd86033ae2370125593d59b8be34253aaf
• https://git.kernel.org/stable/c/72497172a4799119a0282a5eb5e2b8ddcc821921
• https://git.kernel.org/stable/c/c82c860f8c8e4f4f454c9f14d0ad0c0466965f7d
• https://git.kernel.org/stable/c/dcf7a986f377cce0749ed53f1d64195fbd5fdf91
• https://git.kernel.org/stable/c/eb4ecdf631fe00e8020bf461503cb9b7017ed796

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