CVE-2026-53213

About vulnerability

In the Linux kernel, the following vulnerability has been resolved:

drm/vc4: fix krealloc() memory leak

Don’t just overwrite the original pointer passed to krealloc() with its return value without checking latter:

MEM = krealloc(MEM, SZ, GFP);

If krealloc() returns NULL, that erases the pointer to the still allocated memory, hence leaks this memory. Instead, use a temporary variable, check it’s not NULL and only then assign it to the original pointer:

TMP = krealloc(MEM, SZ, GFP); if (!TMP) return; MEM = TMP;

While on it, use krealloc_array().

Affected product:

AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , Debian 10 ELS , Oracle Linux 7 ELS , TuxCare 9.6 ESU , Ubuntu 16.04 ELS , Ubuntu 18.04 ELS , Ubuntu 20.04 ELS

Affected packages:

kernel @ 5.14.0 (+10 more)

Live-patch status from KernelCare for each operating system.