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

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

Severity

5

CVSS

(AV:L/AC:L/Au:S/C:N/I:N/A:C)

Published

05/22/2024

Created

07/04/2024

Added

07/03/2024

Modified

01/07/2025

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

• https://attackerkb.com/topics/cve-2021-47456
• CVE - 2021-47456
• ELSA-2024-4211