CVE-2025-21671: Use After Free
First published: Fri Jan 31 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: zram: fix potential UAF of zram table If zram_meta_alloc failed early, it frees allocated zram->table without setting it NULL. Which will potentially cause zram_meta_free to access the table if user reset an failed and uninitialized device.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=6.1.122<6.1.127 | |
| Linux Kernel | >=6.6.68<6.6.74 | |
| Linux Kernel | >=6.12.7<6.12.11 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-21671?
CVE-2025-21671 has been rated with a high severity due to the potential for a use-after-free vulnerability in the Linux kernel.
How do I fix CVE-2025-21671?
To fix CVE-2025-21671, update your Linux kernel to versions 6.1.128 or later, or apply the relevant patches provided by the Linux community.
Which Linux kernel versions are affected by CVE-2025-21671?
CVE-2025-21671 affects Linux kernel versions 6.1.122 to 6.1.127, 6.6.68 to 6.6.74, and 6.12.7 to 6.12.11.
What is a use-after-free vulnerability as seen in CVE-2025-21671?
In the context of CVE-2025-21671, a use-after-free vulnerability occurs when a program continues to access memory after it has been freed, potentially leading to memory corruption.
Can CVE-2025-21671 be exploited remotely?
CVE-2025-21671 could potentially allow a local user to exploit the vulnerability, but its remote exploitability depends on the specific configurations and workloads.
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