CVE-2026-46285
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
A use-after-free vulnerability was found in the Linux kernel's docg3 driver. The docg3_release() function dereferences freed memory of the docg3 structure after calling doc_release_device().
Risk Assessment
This could cause a system panic or potentially allow arbitrary code execution in kernel context, posing a serious risk to system stability and security.
Recommendation
Immediately update the Linux kernel to a version containing the fix (commit removing the unsafe dereference).
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: mtd: docg3: fix use-after-free in docg3_release() In docg3_release(), the docg3 pointer is obtained from cascade->floors[0]->priv before the loop that calls doc_release_device() on each floor. doc_release_device() frees the docg3 struct via kfree(docg3) at line 1881. After the loop, docg3->cascade->bch dereferences the already-freed pointer. Fix this by accessing cascade->bch directly, which is equivalent since docg3->cascade points back to the same cascade struct, and is already available as a local variable. This also removes the now-unused docg3 local variable.