CVE-2021-47236

net: cdc_eem: fix tx fixup skb leak

Description

In the Linux kernel, the following vulnerability has been resolved: net: cdc_eem: fix tx fixup skb leak when usbnet transmit a skb, eem fixup it in eem_tx_fixup(), if skb_copy_expand() failed, it return NULL, usbnet_start_xmit() will have no chance to free original skb. fix it by free orginal skb in eem_tx_fixup() first, then check skb clone status, if failed, return NULL to usbnet.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.04%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/f12554b0ff639e74612cc01b3b4a049e098d2d65 patch
https://git.kernel.org/stable/c/14184ec5c958b589ba934da7363a2877879204df patch
https://git.kernel.org/stable/c/1bcacd6088d61c0ac6a990d87975600a81f3247e patch
https://git.kernel.org/stable/c/f4e6a7f19c82f39b1803e91c54718f0d7143767d patch
https://git.kernel.org/stable/c/81de2ed06df8b5451e050fe6a318af3263dbff3f patch
https://git.kernel.org/stable/c/05b2b9f7d24b5663d9b47427fe1555bdafd3ea02 patch
https://git.kernel.org/stable/c/b4f7a9fc9d094c0c4a66f2ad7c37b1dbe9e78f88 patch
https://git.kernel.org/stable/c/c3b26fdf1b32f91c7a3bc743384b4a298ab53ad7 patch

Frequently Asked Questions

What is the severity of CVE-2021-47236?
CVE-2021-47236 has been scored as a medium severity vulnerability.
How to fix CVE-2021-47236?
To fix CVE-2021-47236, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47236 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-47236 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47236?
CVE-2021-47236 affects Linux Linux, Linux Linux.
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