CVE-2025-68221
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix address removal logic in mptcp_pm_nl_rm_addr Fix inverted WARN_ON_ONCE condition that prevented normal address removal counter updates. The current code only executes decrement logic when the counter is already 0 (abnormal state), while normal removals (counter > 0) are ignored.
Affected versions
Linux kernel versions
6.15
and later are affected. Fixed in
6.17.10,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-68221 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/92e239e36d600002559074994a545fcfac9afd2d
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PatchKernel patch commithttps://git.kernel.org/stable/c/f7d953c38245c0e9d8e268fb6a9e524602fb44ec
Frequently asked questions
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What is CVE-2025-68221?
CVE-2025-68221 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.15 onward and has been patched in 6.17.10 and 6.18. CVE-2025-68221 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2025-68221?
Yes — CVE-2025-68221 has been patched. Fixed versions include 6.17.10 and 6.18. If you are running Linux kernel 6.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-68221 actively exploited?
No — CVE-2025-68221 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.