High severity7.8NVD Advisory· Published Jun 26, 2026· Updated Jul 8, 2026

CVE-2026-53294

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 products

Linux/Kernel3 versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=4.4,<5.10.258
- cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
- (no CPE)
osv-coords
pkg:linux/kernel
Range: >= 4.4.0, < 5.10.258

Patches

Vulnerability mechanics

References

git.kernel.org/stable/c/240c71a2aea36a1a4210f911a1c32ea88777e8e4nvdPatch
git.kernel.org/stable/c/3afca89fae501dbd7421e1777b5b8f033b1d98d0nvdPatch
git.kernel.org/stable/c/5c209299b0113e289e238fa5f2e8f00c59f76060nvdPatch
git.kernel.org/stable/c/5d4f3d0f64f1016cb78b400a70b67df91fac99b5nvdPatch
git.kernel.org/stable/c/82f6dcea46cf5de65c4ba7283f7c7b34de4a324dnvdPatch
git.kernel.org/stable/c/88ebadbf0deefdaccdab868b44ff70a0a257f473nvdPatch
git.kernel.org/stable/c/c494a11da45ad7ec9b0ff216c3e3ace351193bb6nvdPatch
git.kernel.org/stable/c/fc0089f82c3e36060c2c79156bc2018bfb16b56bnvdPatch

News mentions

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cvss	0.507
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000