CVE-2025-21671 Details
Description
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.
A use-after-free vulnerability has been identified in the zram component of the Linux kernel. This issue arises because, if the zram_meta_alloc function fails early, the allocated zram->table is freed but not set to NULL. As a result, there is a potential for the zram_meta_free function to access the table, particularly if the user resets a device that has failed and remains uninitialized.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 10, 2025References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
| CWE-416 | Use After Free | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.1.122, < 6.1.127 >= 6.6.68, < 6.6.74 >= 6.12.7, < 6.12.11 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Nov 3, 2025 | CVE Modified | CVE |
| Feb 10, 2025 | CVE Modified | CISA-ADP |
| Feb 4, 2025 | Initial Analysis | [email protected] |
| Jan 31, 2025 | New CVE Received | kernel.org |