GHSA-3886-873F-6XPF
Vulnerability from github – Published: 2026-06-25 09:31 – Updated: 2026-07-02 21:32In 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": [],
"aliases": [
"CVE-2026-53213"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-25T09:16:38Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: fix krealloc() memory leak\n\nDon\u0027t just overwrite the original pointer passed to krealloc()\nwith its return value without checking latter:\n\n MEM = krealloc(MEM, SZ, GFP);\n\nIf krealloc() returns NULL, that erases the pointer\nto the still allocated memory, hence leaks this memory.\nInstead, use a temporary variable, check it\u0027s not NULL\nand only then assign it to the original pointer:\n\n TMP = krealloc(MEM, SZ, GFP);\n if (!TMP) return;\n MEM = TMP;\n\nWhile on it, use krealloc_array().",
"id": "GHSA-3886-873f-6xpf",
"modified": "2026-07-02T21:32:05Z",
"published": "2026-06-25T09:31:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53213"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/02f5e4db57c0cdd7bac89d503b301a093a0fa95c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/30165a09f76eaf34951c818eb5d9d6e4771d76f6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4fc692dc6df5bc777cc1bcebf95179e28594875f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5d563a5da8717629ae72f9eadf1e0e340bd1658b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c034aa0b1ba5f49cbdf8ef193d6ec714d74aac27"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e0ce103e89d61eef70edc1d1ae3bfd4c0aacbc2e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fd87d6966041e33ef7d2e5dc59f9a52b71c6ae5f"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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