Overview
- 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 We should guarantee the timer is no longer active before kfree(sbi).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.
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- NVD status
- Modified
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 7.8
- Impact score
- 5.9
- Exploitability score
- 1.8
- Vector string
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity
- HIGH
Weaknesses
- nvd@nist.gov
- CWE-416
Social media
- Hype score
- Not currently trending
🚨 Critical #Linux Kernel Vulnerability Patched: #CVE-2024-49960 Explained https://t.co/TQlYIIJWm9
@UndercodeNews
28 Oct 2024
30 Impressions
0 Retweets
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CVE-2024-49960 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… https://t.co/ezxe3UztaY
@CVEnew
21 Oct 2024
201 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
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