CVE-2026-74559
In the Linux kernel, the following vulnerability has been resolved: xsk: drain continuation descs after overflow in xsk_build_skb() Fix generic xmit path multi-buffer logic when packets are either too big (count of descriptors exceed MAX_SKB_FRAGS) or an invalid descriptor is included in fragmented packet. Introduce xdp_sock::drain_cont and act upon this flag - when it is set, keep on consuming descriptors from AF_XDP Tx ring and put them directly onto Cq. Previously these descriptors were silently lost and could never be reached again.
Affected versions
Linux kernel versions
6.6
and later are affected. Fixed in
6.18.44,
7.1.8,
7.2-rc6
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-74559?
CVE-2026-74559 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.6 onward and has been patched in 6.18.44, 7.1.8 and 7.2-rc6. CVE-2026-74559 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-2026-74559?
Yes. CVE-2026-74559 has been patched. Fixed versions include 6.18.44, 7.1.8 and 7.2-rc6. If you are running Linux kernel 6.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-74559 actively exploited?
No. CVE-2026-74559 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.