{"id":"CVE-2026-74559","title":"xsk: drain continuation descs after overflow in xsk_build_skb()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: drain continuation descs after overflow in xsk_build_skb()\n\nFix generic xmit path multi-buffer logic when packets are either too big\n(count of descriptors exceed M…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= cf24f5a5feeaae34c1a34d1e04f8ac697290427a < ecd0d1cde0478c232a867f14ec99cf97aff5eb30","Linux >= cf24f5a5feeaae34c1a34d1e04f8ac697290427a < ceb00cb87a22c42d20c39336213db2b843ca9e34","Linux >= cf24f5a5feeaae34c1a34d1e04f8ac697290427a < 5e94d74e4f3baebaa083288f33b4be7ce0a34982","Linux >= cf24f5a5feeaae34c1a34d1e04f8ac697290427a < bd44a6dcd4248883de90f5dad53ae80066e27096","Linux 6.6"],"published":"2026-08-15","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:45:57.288Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74559","references":[{"url":"https://git.kernel.org/stable/c/ecd0d1cde0478c232a867f14ec99cf97aff5eb30"},{"url":"https://git.kernel.org/stable/c/ceb00cb87a22c42d20c39336213db2b843ca9e34"},{"url":"https://git.kernel.org/stable/c/5e94d74e4f3baebaa083288f33b4be7ce0a34982"},{"url":"https://git.kernel.org/stable/c/bd44a6dcd4248883de90f5dad53ae80066e27096"}],"tags":["cve.org"],"epss":0.00206,"epssPercentile":0.10136,"ingestedAt":"2026-10-21T12:48:53.578Z","slug":"CVE-2026-74559","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nxsk: drain continuation descs after overflow in xsk_build_skb()\n\nFix generic xmit path multi-buffer logic when packets are either too big\n(count of descriptors exceed MAX_SKB_FRAGS) or an invalid descriptor is\nincluded in fragmented packet. Introduce xdp_sock::drain_cont and act\nupon this flag - when it is set, keep on consuming descriptors from\nAF_XDP Tx ring and put them directly onto Cq. Previously these\ndescriptors were silently lost and could never be reached again.\n\n## Affected\n\n- `Linux >= cf24f5a5feeaae34c1a34d1e04f8ac697290427a < ecd0d1cde0478c232a867f14ec99cf97aff5eb30`\n- `Linux >= cf24f5a5feeaae34c1a34d1e04f8ac697290427a < ceb00cb87a22c42d20c39336213db2b843ca9e34`\n- `Linux >= cf24f5a5feeaae34c1a34d1e04f8ac697290427a < 5e94d74e4f3baebaa083288f33b4be7ce0a34982`\n- `Linux >= cf24f5a5feeaae34c1a34d1e04f8ac697290427a < bd44a6dcd4248883de90f5dad53ae80066e27096`\n- `Linux 6.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}