Tracker / CVE-2021-47240
CVE-2021-47240
High 8.4
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 and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 4.15 → 4.19.196 |
| linux | linux_kernel · 4.20 → 5.4.128 |
| linux | linux_kernel · 5.11 → 5.12.13 |
| linux | linux_kernel · 5.5 → 5.10.46 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.