CVE-2026-53294 Details
Description
In the Linux kernel, the following vulnerability has been resolved: mailbox: mailbox-test: don't free the reused channel The RX channel can be aliased to the TX channel if it has a different MMIO. This special case needs to be handled when freeing the channels otherwise a double-free occurs.
A double-free vulnerability has been identified in the Linux kernel's mailbox testing mechanism. This issue arises because the receive (RX) channel can be mistakenly linked to the transmit (TX) channel if they have different memory-mapped I/O (MMIO) addresses. When freeing the channels, this overlap must be carefully managed to avoid a double-free situation. The vulnerability is present in the stable version of the Linux kernel.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the patched version are available on the official Linux kernel website.
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.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/240c71a2aea36a1a4210f911a1c32ea88777e8e4 | kernel.org | Patch |
| https://git.kernel.org/stable/c/3afca89fae501dbd7421e1777b5b8f033b1d98d0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/5c209299b0113e289e238fa5f2e8f00c59f76060 | kernel.org | Patch |
| https://git.kernel.org/stable/c/5d4f3d0f64f1016cb78b400a70b67df91fac99b5 | kernel.org | Patch |
| https://git.kernel.org/stable/c/82f6dcea46cf5de65c4ba7283f7c7b34de4a324d | kernel.org | Patch |
| https://git.kernel.org/stable/c/88ebadbf0deefdaccdab868b44ff70a0a257f473 | kernel.org | Patch |
| https://git.kernel.org/stable/c/c494a11da45ad7ec9b0ff216c3e3ace351193bb6 | kernel.org | Patch |
| https://git.kernel.org/stable/c/fc0089f82c3e36060c2c79156bc2018bfb16b56b | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-415 | Double Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.4, < 5.10.258 >= 5.11, < 5.15.209 >= 5.16, < 6.1.175 >= 6.2, < 6.6.141 >= 6.7, < 6.12.91 >= 6.13, < 6.18.33 >= 6.19, < 7.0.10 7.1 rc1 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 8, 2026 | Initial Analysis | [email protected] |
| Jun 26, 2026 | New CVE Received | kernel.org |