Description

In the Linux kernel, the following vulnerability has been resolved:

RDMA/uverbs: Prevent integer overflow issue

In the expression "cmd.wqe_size * cmd.wr_count", both variables are u32
values that come from the user so the multiplication can lead to integer
wrapping. Then we pass the result to uverbs_request_next_ptr() which also
could potentially wrap. The "cmd.sge_count * sizeof(struct ib_uverbs_sge)"
multiplication can also overflow on 32bit systems although it's fine on
64bit systems.

This patch does two things. First, I've re-arranged the condition in
uverbs_request_next_ptr() so that the use controlled variable "len" is on
one side of the comparison by itself without any math. Then I've modified
all the callers to use size_mul() for the multiplications.

Classification

CVE ID: CVE-2024-57890

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.04% (scored less or equal to compared to others)

EPSS Date: 2025-02-13 (when was this score calculated)

References

https://git.kernel.org/stable/c/c57721b24bd897338a81a0ca5fff41600f0f1ad1
https://git.kernel.org/stable/c/42a6eb4ed7a9a41ba0b83eb0c7e0225b5fca5608
https://git.kernel.org/stable/c/c2f961c46ea0e5274c5c320d007c2dd949cf627a
https://git.kernel.org/stable/c/346db03e9926ab7117ed9bf19665699c037c773c
https://git.kernel.org/stable/c/b92667f755749cf10d9ef1088865c555ae83ffb7
https://git.kernel.org/stable/c/b3ef4ae713360501182695dd47d6b4f6e1a43eb8
https://git.kernel.org/stable/c/d0257e089d1bbd35c69b6c97ff73e3690ab149a9

Timeline