VulnerabilityPublished 9 Jul 2025Updated 5 Nov 2026

CVE-2025-38258: Linux kernel · mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in c5d5b0047b0c0f304608f3824139f7bd34c48413 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:19 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in c5d5b0047b0c0f304608f3824139f7bd34c48413, 490a43d07f1663d827e802720d30cbc0494e4f81, 4f489fe6afb395dbc79840efa3c05440b760d883 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 9 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to c5d5b0047b0c0f304608f3824139f7bd34c48413, 490a43d07f1663d827e802720d30cbc0494e4f81, 4f489fe6afb395dbc79840efa3c05440b760d883 or 4a158ac0538dd5695eeaa00aa0720d711f3e4ef1.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 7ee161f18b5da5170b5d6a51aace49d312099128, < c5d5b0047b0c0f304608f3824139f7bd34c48413	Fixed in c5d5b0047b0c0f304608f3824139f7bd34c48413
LinuxLinux	Affected ≥ 7ee161f18b5da5170b5d6a51aace49d312099128, < 490a43d07f1663d827e802720d30cbc0494e4f81	Fixed in 490a43d07f1663d827e802720d30cbc0494e4f81
LinuxLinux	Affected ≥ 7ee161f18b5da5170b5d6a51aace49d312099128, < 4f489fe6afb395dbc79840efa3c05440b760d883	Fixed in 4f489fe6afb395dbc79840efa3c05440b760d883
LinuxLinux	Affected ≥ 7ee161f18b5da5170b5d6a51aace49d312099128, < 4a158ac0538dd5695eeaa00aa0720d711f3e4ef1	Fixed in 4a158ac0538dd5695eeaa00aa0720d711f3e4ef1
LinuxLinux	Affected =6.3	Fixed in–

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.

References

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