CVE-2025-68744
In the Linux kernel, the following vulnerability has been resolved: bpf: Free special fields when update [lru_,]percpu_hash maps As [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing calls to 'bpf_obj_free_fields()' in 'pcpu_copy_value()' could cause the memory referenced by BPF_KPTR_{REF,PERCPU} fields to be held until the map gets freed. Fix this by calling 'bpf_obj_free_fields()' after 'copy_map_value[,_long]()' in 'pcpu_copy_value()'.
Affected versions
Linux kernel versions
6.4
and later are affected. Fixed in
6.6.120,
6.12.63,
6.17.13,
6.18.2,
6.19
and their respective stable series.
References
The following references provide additional information about CVE-2025-68744 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/3bf1378747e251571e0de15e7e0a6bf2919044e7
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PatchKernel patch commithttps://git.kernel.org/stable/c/4a03d69cece145e4fb527464be29c3806aa3221e
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PatchKernel patch commithttps://git.kernel.org/stable/c/6af6e49a76c9af7d42eb923703e7648cb2bf401a
Frequently asked questions
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What is CVE-2025-68744?
CVE-2025-68744 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.4 onward and has been patched in 6.6.120, 6.12.63, 6.17.13 and others. CVE-2025-68744 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-2025-68744?
Yes — CVE-2025-68744 has been patched. Fixed versions include 6.6.120, 6.12.63, 6.17.13 and others. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-68744 actively exploited?
No — CVE-2025-68744 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.