CVE-2026-53213
drm/vc4: fix krealloc() memory leak
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().
INFO
Published Date :
June 25, 2026, 9:16 a.m.
Last Modified :
July 2, 2026, 8:52 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Use a temporary variable for krealloc() return.
- Check if the temporary variable is NULL.
- Assign temporary variable to original pointer if not NULL.
- Consider using krealloc_array() where applicable.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53213.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53213 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53213
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53213 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53213 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 02, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-401 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.176 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.143 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.94 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.8 up to (excluding) 5.15.210 Added Reference Type kernel.org: https://git.kernel.org/stable/c/02f5e4db57c0cdd7bac89d503b301a093a0fa95c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/30165a09f76eaf34951c818eb5d9d6e4771d76f6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4fc692dc6df5bc777cc1bcebf95179e28594875f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5d563a5da8717629ae72f9eadf1e0e340bd1658b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c034aa0b1ba5f49cbdf8ef193d6ec714d74aac27 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e0ce103e89d61eef70edc1d1ae3bfd4c0aacbc2e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/fd87d6966041e33ef7d2e5dc59f9a52b71c6ae5f Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6d45c81d229d71da54d374143e7d6abad4c0cf31', 'lessThan': '30165a09f76eaf34951c818eb5d9d6e4771d76f6', 'versionType': 'git'}, {'status': 'affected', 'version': '6d45c81d229d71da54d374143e7d6abad4c0cf31', 'lessThan': 'fd87d6966041e33ef7d2e5dc59f9a52b71c6ae5f', 'versionType': 'git'}, {'status': 'affected', 'version': '6d45c81d229d71da54d374143e7d6abad4c0cf31', 'lessThan': 'e0ce103e89d61eef70edc1d1ae3bfd4c0aacbc2e', 'versionType': 'git'}, {'status': 'affected', 'version': '6d45c81d229d71da54d374143e7d6abad4c0cf31', 'lessThan': 'c034aa0b1ba5f49cbdf8ef193d6ec714d74aac27', 'versionType': 'git'}, {'status': 'affected', 'version': '6d45c81d229d71da54d374143e7d6abad4c0cf31', 'lessThan': '02f5e4db57c0cdd7bac89d503b301a093a0fa95c', 'versionType': 'git'}, {'status': 'affected', 'version': '6d45c81d229d71da54d374143e7d6abad4c0cf31', 'lessThan': '4fc692dc6df5bc777cc1bcebf95179e28594875f', 'versionType': 'git'}, {'status': 'affected', 'version': '6d45c81d229d71da54d374143e7d6abad4c0cf31', 'lessThan': '5d563a5da8717629ae72f9eadf1e0e340bd1658b', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/vc4/vc4_validate_shaders.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/vc4/vc4_validate_shaders.c'], 'defaultStatus': 'affected'}] Added 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(). Added Reference https://git.kernel.org/stable/c/02f5e4db57c0cdd7bac89d503b301a093a0fa95c Added Reference https://git.kernel.org/stable/c/30165a09f76eaf34951c818eb5d9d6e4771d76f6 Added Reference https://git.kernel.org/stable/c/4fc692dc6df5bc777cc1bcebf95179e28594875f Added Reference https://git.kernel.org/stable/c/5d563a5da8717629ae72f9eadf1e0e340bd1658b Added Reference https://git.kernel.org/stable/c/c034aa0b1ba5f49cbdf8ef193d6ec714d74aac27 Added Reference https://git.kernel.org/stable/c/e0ce103e89d61eef70edc1d1ae3bfd4c0aacbc2e Added Reference https://git.kernel.org/stable/c/fd87d6966041e33ef7d2e5dc59f9a52b71c6ae5f