CVE-2021-47236
net: cdc_eem: fix tx fixup skb leak
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
21 May 2024Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/05b2b9f7d24b5663d9b47427fe1555bdafd3ea02https://git.kernel.org/stable/c/14184ec5c958b589ba934da7363a2877879204dfhttps://git.kernel.org/stable/c/1bcacd6088d61c0ac6a990d87975600a81f3247ehttps://git.kernel.org/stable/c/81de2ed06df8b5451e050fe6a318af3263dbff3fhttps://git.kernel.org/stable/c/b4f7a9fc9d094c0c4a66f2ad7c37b1dbe9e78f88https://git.kernel.org/stable/c/c3b26fdf1b32f91c7a3bc743384b4a298ab53ad7https://git.kernel.org/stable/c/f12554b0ff639e74612cc01b3b4a049e098d2d65https://git.kernel.org/stable/c/f4e6a7f19c82f39b1803e91c54718f0d7143767d