In the Linux kernel, the following vulnerability has been resolved:
net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
In emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..).
If some error happens in emac_tx_fill_tpd(), the skb will be freed via
dev_kfree_skb(skb) in error branch of emac_tx_fill_tpd().
But the freed skb is still used via skb->len by netdev_sent_queue(,skb->len).
As i observed that emac_tx_fill_tpd() haven't modified the value of skb->len,
thus my patch assigns skb->len to 'len' before the possible free and
use 'len' instead of skb->len later.
References
Configurations
Configuration 1 (hide)
|
History
09 Dec 2024, 17:59
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-416 | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| References | () https://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834 - Patch | |
| References | () https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775d - Patch | |
| References | () https://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57 - Patch | |
| References | () https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7 - Patch | |
| References | () https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99d - Patch | |
| References | () https://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955 - Patch | |
| References | () https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322 - Patch | |
| References | () https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b - Patch |
Information
Published : 2024-02-28 09:15
Updated : 2024-12-09 17:59
NVD link : CVE-2021-47013
Mitre link : CVE-2021-47013
CVE.ORG link : CVE-2021-47013
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free