{"id":"CVE-2026-74559","state":"PUBLISHED","title":"xsk: drain continuation descs after overflow in xsk_build_skb()","description":"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 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.","publishedAt":"2026-08-15T12:28:03.279Z","updatedAt":"2026-10-21T12:45:57.288Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cf24f5a5feeaae34c1a34d1e04f8ac697290427a","status":"affected","lessThan":"ecd0d1cde0478c232a867f14ec99cf97aff5eb30","versionType":"git"},{"version":"cf24f5a5feeaae34c1a34d1e04f8ac697290427a","status":"affected","lessThan":"ceb00cb87a22c42d20c39336213db2b843ca9e34","versionType":"git"},{"version":"cf24f5a5feeaae34c1a34d1e04f8ac697290427a","status":"affected","lessThan":"5e94d74e4f3baebaa083288f33b4be7ce0a34982","versionType":"git"},{"version":"cf24f5a5feeaae34c1a34d1e04f8ac697290427a","status":"affected","lessThan":"bd44a6dcd4248883de90f5dad53ae80066e27096","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/net/xdp_sock.h","net/xdp/xsk.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/net/xdp_sock.h","net/xdp/xsk.c"]}],"references":["https://git.kernel.org/stable/c/ecd0d1cde0478c232a867f14ec99cf97aff5eb30","https://git.kernel.org/stable/c/ceb00cb87a22c42d20c39336213db2b843ca9e34","https://git.kernel.org/stable/c/5e94d74e4f3baebaa083288f33b4be7ce0a34982","https://git.kernel.org/stable/c/bd44a6dcd4248883de90f5dad53ae80066e27096"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74559.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74559","state":"PUBLISHED","datePublished":"2026-08-15T12:28:03.279Z","dateUpdated":"2026-10-21T12:45:57.288Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.916Z"},"containers":{"cna":{"title":"xsk: drain continuation descs after overflow in xsk_build_skb()","descriptions":[{"lang":"en","value":"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 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cf24f5a5feeaae34c1a34d1e04f8ac697290427a","status":"affected","lessThan":"ecd0d1cde0478c232a867f14ec99cf97aff5eb30","versionType":"git"},{"version":"cf24f5a5feeaae34c1a34d1e04f8ac697290427a","status":"affected","lessThan":"ceb00cb87a22c42d20c39336213db2b843ca9e34","versionType":"git"},{"version":"cf24f5a5feeaae34c1a34d1e04f8ac697290427a","status":"affected","lessThan":"5e94d74e4f3baebaa083288f33b4be7ce0a34982","versionType":"git"},{"version":"cf24f5a5feeaae34c1a34d1e04f8ac697290427a","status":"affected","lessThan":"bd44a6dcd4248883de90f5dad53ae80066e27096","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/net/xdp_sock.h","net/xdp/xsk.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/net/xdp_sock.h","net/xdp/xsk.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:45:57.288Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}