CVE - CVE-2024-49960

CVE-ID
CVE-2024-49960	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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 We should guarantee the timer is no longer active before kfree(sbi).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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0ce160c5bdb67081a62293028dc85758a8efb22a URL:https://git.kernel.org/stable/c/0ce160c5bdb67081a62293028dc85758a8efb22a MISC:https://git.kernel.org/stable/c/9203817ba46ebba7c865c8de2aba399537b6e891 URL:https://git.kernel.org/stable/c/9203817ba46ebba7c865c8de2aba399537b6e891 MISC:https://git.kernel.org/stable/c/b85569585d0154d4db1e4f9e3e6a4731d407feb0 URL:https://git.kernel.org/stable/c/b85569585d0154d4db1e4f9e3e6a4731d407feb0 MISC:https://git.kernel.org/stable/c/cf3196e5e2f36cd80dab91ffae402e13935724bc URL:https://git.kernel.org/stable/c/cf3196e5e2f36cd80dab91ffae402e13935724bc MISC:https://git.kernel.org/stable/c/fa78fb51d396f4f2f80f8e96a3b1516f394258be URL:https://git.kernel.org/stable/c/fa78fb51d396f4f2f80f8e96a3b1516f394258be
Assigning CNA
kernel.org
Date Record Created
20241021	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241021)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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