CVE-2026-53213

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux6d45c81d229d71da54d374143e7d6abad4c0cf31 < 30165a09f76eaf34951c818eb5d9d6e4771d76f6affected
LinuxLinux6d45c81d229d71da54d374143e7d6abad4c0cf31 < fd87d6966041e33ef7d2e5dc59f9a52b71c6ae5faffected
LinuxLinux6d45c81d229d71da54d374143e7d6abad4c0cf31 < e0ce103e89d61eef70edc1d1ae3bfd4c0aacbc2eaffected
LinuxLinux6d45c81d229d71da54d374143e7d6abad4c0cf31 < c034aa0b1ba5f49cbdf8ef193d6ec714d74aac27affected
LinuxLinux6d45c81d229d71da54d374143e7d6abad4c0cf31 < 02f5e4db57c0cdd7bac89d503b301a093a0fa95caffected
LinuxLinux6d45c81d229d71da54d374143e7d6abad4c0cf31 < 4fc692dc6df5bc777cc1bcebf95179e28594875faffected
LinuxLinux6d45c81d229d71da54d374143e7d6abad4c0cf31 < 5d563a5da8717629ae72f9eadf1e0e340bd1658baffected
LinuxLinux4.8affected
LinuxLinux0 < 4.8unaffected
LinuxLinux5.15.210 <= 5.15.*unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.94 <= 6.12.*unaffected
LinuxLinux6.18.36 <= 6.18.*unaffected
LinuxLinux7.0.13 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References