Vulnerability Information
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Vulnerability Title
Linux kernel io_uring PROVIDE_BUFFERS MAX_RW_COUNT bypass
Vulnerability Description
The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc/<PID>/mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b ("io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers") (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c ("io_uring: add IORING_OP_PROVIDE_BUFFERS") (v5.7-rc1).
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Vulnerability Type
缓冲区大小计算不正确
Vulnerability Title
Linux kernel 缓冲区错误漏洞
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel MAX_RW_COUNT存在缓冲区错误漏洞。攻击者可以通过Linux内核的MAX_RW_COUNT触发缓冲区溢出，以触发拒绝服务，并可能运行代码。
CVSS Information
N/A
Vulnerability Type
N/A