PT-2026-43723 · Linux+1 · Linux Kernel+1
CVE-2026-45856
·
Published
2026-05-27
·
Updated
2026-07-31
CVSS v3.1
7.1
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The
ib uverbs post send() function uses the wqe size variable from userspace without validation before passing it to kmalloc(). If a small value is provided for wqe size, the system may perform an out-of-bounds read from kernel heap memory when accessing fields such as user wr->opcode and user wr->num sge, potentially leaking sensitive kernel information to userspace. Additionally, an excessively large wqe size can trigger a warning in the memory allocation path.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel