What’s Vulnerable › Vulnerabilities

CVE-2025-38660: [ceph] parse_longname(): strrchr() expects NUL-terminated string

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-22 · updated 2026-10-15

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...

Affected products

• Linux kernel: from 6.6 before 6.12.42; from 6.13 before 6.15.10; from 6.16 before 6.16.1 — fixed in 6.12.42, 6.15.10, 6.16.1

How to fix

Upgrade to a fixed version: Linux kernel 6.12.42, 6.15.10, 6.16.1. Check the vendor advisory for mitigations.

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/4b9aee707c4580511983a0998547f3b28514e6a6
• https://git.kernel.org/stable/c/bb80f7618832d26f7e395f52f82b1dac76223e5f

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