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Red Hat: CVE-2021-47236: kernel: net: cdc_eem: fix tx fixup skb leak (Multiple Advisories)

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Red Hat: CVE-2021-47236: kernel: net: cdc_eem: fix tx fixup skb leak (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
05/21/2024
Created
07/03/2024
Added
07/03/2024
Modified
07/09/2024

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.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2021-47236
  • RHSA-2024:4211
  • RHSA-2024:4352

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