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Debian: CVE-2024-49960: linux, linux-6.1 -- security update

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Debian: CVE-2024-49960: linux, linux-6.1 -- security update

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
10/21/2024
Created
12/03/2024
Added
12/02/2024
Modified
01/28/2025

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix timer use-after-free on failed mount Syzbot has found an ODEBUG bug in ext4_fill_super The del_timer_sync function cancels the s_err_report timer, which reminds about filesystem errors daily. We should guarantee the timer is no longer active before kfree(sbi). When filesystem mounting fails, the flow goes to failed_mount3, where an error occurs when ext4_stop_mmpd is called, causing a read I/O failure. This triggers the ext4_handle_error function that ultimately re-arms the timer, leaving the s_err_report timer active before kfree(sbi) is called. Fix the issue by canceling the s_err_report timer after calling ext4_stop_mmpd.

Solution(s)

  • debian-upgrade-linux
  • debian-upgrade-linux-6-1

References

  • https://attackerkb.com/topics/cve-2024-49960
  • CVE - 2024-49960
  • DSA-5818-1
  • 查看数 694
  • 已创建
  • 最后回复

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