CVE-2026-53213

Description

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().

References

• https://git.kernel.org/stable/c/02f5e4db57c0cdd7bac89d503b301a093a0fa95c
• https://git.kernel.org/stable/c/30165a09f76eaf34951c818eb5d9d6e4771d76f6
• https://git.kernel.org/stable/c/4fc692dc6df5bc777cc1bcebf95179e28594875f
• https://git.kernel.org/stable/c/5d563a5da8717629ae72f9eadf1e0e340bd1658b
• https://git.kernel.org/stable/c/c034aa0b1ba5f49cbdf8ef193d6ec714d74aac27