CVE-2025-40074
In the Linux kernel, the following vulnerability has been resolved: ipv4: start using dst_dev_rcu() Change icmpv4_xrlim_allow(), ip_defrag() to prevent possible UAF. Change ipmr_prepare_xmit(), ipmr_queue_fwd_xmit(), ip_mr_output(), ipv4_neigh_lookup() to use lockdep enabled dst_dev_rcu().
Affected versions
Linux kernel versions
4.13
and later are affected. Fixed in
6.17.3,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40074 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/6ad8de3cefdb6ffa6708b21c567df0dbf82c43a8
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PatchKernel patch commithttps://git.kernel.org/stable/c/923e0734c386984d45de508528a7a7ad91d791cc
Frequently asked questions
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What is CVE-2025-40074?
CVE-2025-40074 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.13 onward and has been patched in 6.17.3 and 6.18. CVE-2025-40074 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-2025-40074?
Yes — CVE-2025-40074 has been patched. Fixed versions include 6.17.3 and 6.18. If you are running Linux kernel 4.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40074 actively exploited?
No — CVE-2025-40074 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.