CVE-2025-38258
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write memcg_path_store() assigns a newly allocated memory buffer to filter->memcg_path, without deallocating the previously allocated and assigned memory buffer. As a result, users can leak kernel memory by continuously writing a data to memcg_path DAMOS sysfs file. Fix the leak by deallocating the previously set memory buffer.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-07-09 11:15:28.110000
Last modified
2026-11-05 21:18:23.580000
View original CVE JSON
{
"id": "CVE-2025-38258",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-07-09T11:15:28.110",
"lastModified": "2026-11-05T21:18:23.580",
"vulnStatus": "Analyzed",
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write\n\nmemcg_path_store() assigns a newly allocated memory buffer to\nfilter->memcg_path, without deallocating the previously allocated and\nassigned memory buffer. As a result, users can leak kernel memory by\ncontinuously writing a data to memcg_path DAMOS sysfs file. Fix the leak\nby deallocating the previously set memory buffer."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/damon/sysfs-schemes: la liberación de la antigua ruta damon_sysfs_scheme_filter->memcg_path al escribir en memcg_path_store() asigna un búfer de memoria recién asignado a filter->memcg_path, sin liberar el búfer de memoria previamente asignado. Como resultado, los usuarios pueden perder memoria del kernel escribiendo continuamente datos en el archivo sysfs de DAMOS, memcg_path. Para solucionar la pérdida, libere el búfer de memoria previamente asignado."
}
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"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
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