NetSight
IP …
high8.4

CVE-2021-47240

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 qr…

Impact

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.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 4.15 before 4.19.196
from 4.20 before 5.4.128
from 5.5 before 5.10.46
from 5.11 before 5.12.13
Version 5.13

Weakness classification

CWE-125

References