CVE-2026-64414
In the Linux kernel, the following vulnerability has been resolved: netfilter: handle unreadable frags sashiko reports: When an skb with unreadable fragments (such as from devmem TCP, where skb_frags_readable(skb) returns false) is processed by the u32 module, skb_copy_bits() will safely return a negative error code [..] xt_u32: bail out with hotdrop in this case. gather_frags: return -1, just as if we had no fragment header. nfnetlink_queue: restrict to the linear part. nfnetlink_log: restrict to the linear part. v2: - skb_zerocopy helpers don't copy readable flag, i.e. nfnetlink_queue is broken too xt_u32 shouldn't return true if hotdrop was set.
Affected versions
Linux kernel versions
6.12
and later are affected. Fixed in
6.12.96,
6.18.39,
7.1.4,
7.2-rc3
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-64414?
CVE-2026-64414 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.12 onward and has been patched in 6.12.96, 6.18.39, 7.1.4 and others. CVE-2026-64414 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-2026-64414?
Yes. CVE-2026-64414 has been patched. Fixed versions include 6.12.96, 6.18.39, 7.1.4 and others. If you are running Linux kernel 6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-64414 actively exploited?
No. CVE-2026-64414 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.