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Oracle Linux: (CVE-2021-47456) ELSA-2024-4211: kernel security and bug fix update

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Oracle Linux: (CVE-2021-47456) 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
05/22/2024
Created
07/04/2024
Added
07/03/2024
Modified
07/03/2024

Description

In the Linux kernel, the following vulnerability has been resolved:

can: peak_pci: peak_pci_remove(): fix UAF

When remove the module peek_pci, referencing 'chan' again after

releasing 'dev' will cause UAF.

Fix this by releasing 'dev' later.

The following log reveals it:

[ 35.961814 ] BUG: KASAN: use-after-free in peak_pci_remove+0x16f/0x270 [peak_pci]

[ 35.963414 ] Read of size 8 at addr ffff888136998ee8 by task modprobe/5537

[ 35.965513 ] Call Trace:

[ 35.965718 ] dump_stack_lvl+0xa8/0xd1

[ 35.966028 ] print_address_description+0x87/0x3b0

[ 35.966420 ] kasan_report+0x172/0x1c0

[ 35.966725 ] ? peak_pci_remove+0x16f/0x270 [peak_pci]

[ 35.967137 ] ? trace_irq_enable_rcuidle+0x10/0x170

[ 35.967529 ] ? peak_pci_remove+0x16f/0x270 [peak_pci]

[ 35.967945 ] __asan_report_load8_noabort+0x14/0x20

[ 35.968346 ] peak_pci_remove+0x16f/0x270 [peak_pci]

[ 35.968752 ] pci_device_remove+0xa9/0x250

Solution(s)

  • oracle-linux-upgrade-kernel

References

  • ELSA-2024-4211
  • CVE-2021-47456

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