Vulnerability Details CVE-2024-58000
In the Linux kernel, the following vulnerability has been resolved:
io_uring: prevent reg-wait speculations
With *ENTER_EXT_ARG_REG instead of passing a user pointer with arguments
for the waiting loop the user can specify an offset into a pre-mapped
region of memory, in which case the
[offset, offset + sizeof(io_uring_reg_wait)) will be intepreted as the
argument.
As we address a kernel array using a user given index, it'd be a subject
to speculation type of exploits. Use array_index_nospec() to prevent
that. Make sure to pass not the full region size but truncate by the
maximum offset allowed considering the structure size.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 11.1%
CVSS Severity
CVSS v3 Score 5.5
References
Products affected by CVE-2024-58000
-
cpe:2.3:o:linux:linux_kernel:6.13
-
cpe:2.3:o:linux:linux_kernel:6.13.1