Use-after-free of transaction_t race in jbd2
Summary
GSD-2022-1001330: jbd2: fix use-after-free of transaction_t race. Affects Kernel versions >= 4f98186848707f530669238d90e0562d92a78aab, < bff94c57bd130e3062afa94414c2294871314096. No fix is published. How to fix ↓
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Background
The jbd2 (journaling block device 2) is a component of the Linux Kernel that provides support for file system journaling. It ensures the consistency and integrity of file systems by logging changes before they are committed to disk. The transaction_t structure is used to represent a journaling transaction in jbd2. However, a use-after-free vulnerability has been discovered in the race condition of the transaction_t structure, potentially leading to security issues.
Vulnerability Detail
The use-after-free vulnerability in jbd2 arises from a race condition in the handling of the transaction_t structure. This vulnerability can be exploited by an attacker to corrupt memory or execute arbitrary code. The impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability was introduced in Linux Kernel version v5.17 by commit 4f98186848707f530669238d90e0562d92a78aab and has been fixed in version v5.17.1 by commit bff94c57bd130e3062afa94414c2294871314096.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability at the moment.
Conclusion
The use-after-free of transaction_t race vulnerability in jbd2 can potentially lead to security issues. It is recommended to update the Linux Kernel to version v5.17.1 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
jbd2 (journaling block device 2) is a component of the Linux Kernel that provides support for file system journaling. It ensures the consistency and integrity of file systems by logging changes before they are committed to disk.
A use-after-free vulnerability occurs when a program continues to use a memory region after it has been freed. This can lead to memory corruption or the execution of arbitrary code.
This vulnerability can be exploited by an attacker to corrupt memory or execute arbitrary code. However, the impact and attack plausibility have not been proven yet.
This vulnerability was introduced in Linux Kernel version v5.17 by commit 4f98186848707f530669238d90e0562d92a78aab.
Yes, this vulnerability has been fixed in Linux Kernel version v5.17.1 by commit bff94c57bd130e3062afa94414c2294871314096.
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