# CVE-2022-49410: linux: In the Linux kernel, the following vulnerability has been resolved:  tracing: Fix potential double free in create_var...

CVE-2022-49410 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49410, released February 26, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-49410
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  tracing: Fix potential double free in create_var_ref()  In create_var_ref(), init_var_ref() is called to initialize the fields of variable ref_field, which is allocated in the previous function call to create_hist_field(). Function init_var_ref() allocates the corresponding fields such as ref_field->system, but frees these fields when the function encounters an error. The caller later calls destroy_hist_field() to conduct error handling, which frees the fields and the variable itself. This results in double free of the fields which are already freed in the previous function.  Fix this by storing NULL to the corresponding fields when they are freed in init_var_ref().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.5-1 | [DEBIAN-CVE-2022-49410](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49410.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.5-1 | [DEBIAN-CVE-2022-49410](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49410.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.5-1 | [DEBIAN-CVE-2022-49410](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49410.md) | Feb 26, 2025 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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