Linux Kernel: Double-Free in mailbox:mailbox-test Channel Aliasing
CVE-2026-53294 Published on June 26, 2026
mailbox: mailbox-test: don't free the reused channel
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.
Products Associated with CVE-2026-53294
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Affected Versions
Linux:- Version 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and below fc0089f82c3e36060c2c79156bc2018bfb16b56b is affected.
- Version 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and below 5d4f3d0f64f1016cb78b400a70b67df91fac99b5 is affected.
- Version 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and below c494a11da45ad7ec9b0ff216c3e3ace351193bb6 is affected.
- Version 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and below 3afca89fae501dbd7421e1777b5b8f033b1d98d0 is affected.
- Version 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and below 5c209299b0113e289e238fa5f2e8f00c59f76060 is affected.
- Version 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and below 82f6dcea46cf5de65c4ba7283f7c7b34de4a324d is affected.
- Version 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and below 240c71a2aea36a1a4210f911a1c32ea88777e8e4 is affected.
- Version 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and below 88ebadbf0deefdaccdab868b44ff70a0a257f473 is affected.
- Version 4.4 is affected.
- Before 4.4 is unaffected.
- Version 5.10.258, <= 5.10.* is unaffected.
- Version 5.15.209, <= 5.15.* is unaffected.
- Version 6.1.175, <= 6.1.* is unaffected.
- Version 6.6.141, <= 6.6.* is unaffected.
- Version 6.12.91, <= 6.12.* is unaffected.
- Version 6.18.33, <= 6.18.* is unaffected.
- Version 7.0.10, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.