How severe is CVE-2021-47240?

This vulnerability has a severity rating of HIGH with a CVSS score of 7.1 out of 10.

What type of vulnerability is CVE-2021-47240?

This is classified as CWE-125, which is a common weakness in software security.

CVE-2021-47240 - HIGH Severity | CVSS 7.1

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: fix OOB Read in qrtr_endpoint_post Syzbot reported slab-out-of-bounds Read in qrtr_endpoint_post. The problem was in wrong _size_ type: if (len != ALIGN(size, 4) + hdrlen) goto err; If size from qrtr_hdr is 4294967293 (0xfffffffd), the result of ALIGN(size, 4) will be 0. In case of len == hdrlen and size == 4294967293 in header this check won't fail and skb_put_data(skb, data + hdrlen, size); will read out of bound from data, which is hdrlen allocated block.

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