CVE-2025-38660
CVE-2025-38660 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- EPSS exploit prediction: 0% (4th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-25542
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
In the Linux kernel, the following vulnerability has been resolved: [ceph] parse_longname(): strrchr() expects NUL-terminated string ... and parse_longname() is not guaranteed that. That's the reason why it uses kmemdup_nul() to build the argument for kstrtou64(); the problem is, kstrtou64() is not the only thing that need it. Just get a NUL-terminated copy of the entire thing and be done with that...
Frequently asked questions
- What is CVE-2025-38660?
- In the Linux kernel, the following vulnerability has been resolved: [ceph] parse_longname(): strrchr() expects NUL-terminated string ... and parse_longname() is not guaranteed that. That's the reason why it uses kmemdup_nul() to build the argument for kstrtou64(); the problem is, kstrtou64() is not the only thing that need it. Just get a NUL-terminated copy of the entire thing and be done with that...
- How severe is CVE-2025-38660?
- CVE-2025-38660 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2025-38660 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-38660?
- CVE-2025-38660 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-38660?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-38660 have an EU (EUVD) identifier?
- Yes. CVE-2025-38660 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25542.
- When was CVE-2025-38660 published?
- CVE-2025-38660 was published on 2025-08-22 and last updated on 2026-06-17.
References
- https://git.kernel.org/stable/c/101841c38346f4ca41dc1802c867da990ffb32eb
- https://git.kernel.org/stable/c/3145b2b11492d61c512bbc59660bb823bc757f48
- https://git.kernel.org/stable/c/493479af8af3ab907f49e99323777d498a4fbd2b
- https://git.kernel.org/stable/c/bb80f7618832d26f7e395f52f82b1dac76223e5f
Affected products (1)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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