CVE-2026-53294
mailbox: mailbox-test: don't free the reused channel
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.
INFO
Published Date :
June 26, 2026, 8:17 p.m.
Last Modified :
July 8, 2026, 3:53 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the Linux kernel to the latest version.
- Apply the specific patch for the mailbox double-free.
- Verify the mailbox component handles channel freeing correctly.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53294.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53294 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53294
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53294 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53294 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-415 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.141 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.91 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.10 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.175 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.4 up to (excluding) 5.10.258 Added Reference Type kernel.org: https://git.kernel.org/stable/c/240c71a2aea36a1a4210f911a1c32ea88777e8e4 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3afca89fae501dbd7421e1777b5b8f033b1d98d0 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5c209299b0113e289e238fa5f2e8f00c59f76060 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5d4f3d0f64f1016cb78b400a70b67df91fac99b5 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/82f6dcea46cf5de65c4ba7283f7c7b34de4a324d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/88ebadbf0deefdaccdab868b44ff70a0a257f473 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c494a11da45ad7ec9b0ff216c3e3ace351193bb6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/fc0089f82c3e36060c2c79156bc2018bfb16b56b Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 26, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8ea4484d0c2bb4e2152261943fa1a3522654b1c7', 'lessThan': 'fc0089f82c3e36060c2c79156bc2018bfb16b56b', 'versionType': 'git'}, {'status': 'affected', 'version': '8ea4484d0c2bb4e2152261943fa1a3522654b1c7', 'lessThan': '5d4f3d0f64f1016cb78b400a70b67df91fac99b5', 'versionType': 'git'}, {'status': 'affected', 'version': '8ea4484d0c2bb4e2152261943fa1a3522654b1c7', 'lessThan': 'c494a11da45ad7ec9b0ff216c3e3ace351193bb6', 'versionType': 'git'}, {'status': 'affected', 'version': '8ea4484d0c2bb4e2152261943fa1a3522654b1c7', 'lessThan': '3afca89fae501dbd7421e1777b5b8f033b1d98d0', 'versionType': 'git'}, {'status': 'affected', 'version': '8ea4484d0c2bb4e2152261943fa1a3522654b1c7', 'lessThan': '5c209299b0113e289e238fa5f2e8f00c59f76060', 'versionType': 'git'}, {'status': 'affected', 'version': '8ea4484d0c2bb4e2152261943fa1a3522654b1c7', 'lessThan': '82f6dcea46cf5de65c4ba7283f7c7b34de4a324d', 'versionType': 'git'}, {'status': 'affected', 'version': '8ea4484d0c2bb4e2152261943fa1a3522654b1c7', 'lessThan': '240c71a2aea36a1a4210f911a1c32ea88777e8e4', 'versionType': 'git'}, {'status': 'affected', 'version': '8ea4484d0c2bb4e2152261943fa1a3522654b1c7', 'lessThan': '88ebadbf0deefdaccdab868b44ff70a0a257f473', 'versionType': 'git'}], 'programFiles': ['drivers/mailbox/mailbox-test.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.4'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.4', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.258', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.209', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.141', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.91', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.33', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.10', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/mailbox/mailbox-test.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/240c71a2aea36a1a4210f911a1c32ea88777e8e4 Added Reference https://git.kernel.org/stable/c/3afca89fae501dbd7421e1777b5b8f033b1d98d0 Added Reference https://git.kernel.org/stable/c/5c209299b0113e289e238fa5f2e8f00c59f76060 Added Reference https://git.kernel.org/stable/c/5d4f3d0f64f1016cb78b400a70b67df91fac99b5 Added Reference https://git.kernel.org/stable/c/82f6dcea46cf5de65c4ba7283f7c7b34de4a324d Added Reference https://git.kernel.org/stable/c/88ebadbf0deefdaccdab868b44ff70a0a257f473 Added Reference https://git.kernel.org/stable/c/c494a11da45ad7ec9b0ff216c3e3ace351193bb6 Added Reference https://git.kernel.org/stable/c/fc0089f82c3e36060c2c79156bc2018bfb16b56b