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Oracle Linux: (CVE-2021-47236) ELSA-2024-4211: kernel security and bug fix update

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Oracle Linux: (CVE-2021-47236) ELSA-2024-4211: kernel security and bug fix update

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
05/21/2024
Created
07/04/2024
Added
07/03/2024
Modified
07/03/2024

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)

  • oracle-linux-upgrade-kernel

References

  • ELSA-2024-4211
  • CVE-2021-47236

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