CVE-2026-53294

mailbox: mailbox-test: don't free the reused channel

HIGH

7.8

CVSS Score

Published: June 26, 2026 at 07:40 PM UTC

Updated: July 8, 2026 at 04:09 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH7.8

Exploit prediction

EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

4.4 ≤ v < 5.10.2584.4 ≤ v < 5.15.2094.4 ≤ v < 6.1.1754.4 ≤ v < 6.12.914.4 ≤ v < 6.18.334.4 ≤ v < 6.6.1414.4 ≤ v < 7.0.104.4 ≤ v < 7.15.11 ≤ v < 5.15.2095.16 ≤ v < 6.1.1756.13 ≤ v < 6.18.336.19 ≤ v < 7.0.106.2 ≤ v < 6.6.1416.7 ≤ v < 6.12.917.1 rc18ea4484d0c2bb4e2152261943fa1a3522654b1c7

Vendor states this is fixed in 240c71a2aea36a1a4210f911a1c32ea88777e8e4 (fixed)

Vendor states this is fixed in 3afca89fae501dbd7421e1777b5b8f033b1d98d0 (fixed)

Vendor states this is fixed in 5c209299b0113e289e238fa5f2e8f00c59f76060 (fixed)

Vendor states this is fixed in 5d4f3d0f64f1016cb78b400a70b67df91fac99b5 (fixed)

Vendor states this is fixed in 82f6dcea46cf5de65c4ba7283f7c7b34de4a324d (fixed)

Vendor states this is fixed in 88ebadbf0deefdaccdab868b44ff70a0a257f473 (fixed)

Vendor states this is fixed in c494a11da45ad7ec9b0ff216c3e3ace351193bb6 (fixed)

Vendor states this is fixed in fc0089f82c3e36060c2c79156bc2018bfb16b56b (fixed)

Vendor states this is fixed in 4.4 (unaffected)

Vendor states this is fixed in 5.10.258 (unaffected)

Vendor states this is fixed in 5.15.209 (unaffected)

Vendor states this is fixed in 6.1.175 (unaffected)