CVE-2026-74559

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74559", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.916Z", "datePublished": "2026-08-15T12:28:03.279Z", "dateUpdated": "2026-10-21T12:45:57.288Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:45:57.288Z"}, "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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/xdp_sock.h", "net/xdp/xsk.c"], "versions": [{"version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a", "lessThan": "ecd0d1cde0478c232a867f14ec99cf97aff5eb30", "status": "affected", "versionType": "git"}, {"version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a", "lessThan": "ceb00cb87a22c42d20c39336213db2b843ca9e34", "status": "affected", "versionType": "git"}, {"version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a", "lessThan": "5e94d74e4f3baebaa083288f33b4be7ce0a34982", "status": "affected", "versionType": "git"}, {"version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a", "lessThan": "bd44a6dcd4248883de90f5dad53ae80066e27096", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/xdp_sock.h", "net/xdp/xsk.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "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"}]}]}], "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"}], "title": "xsk: drain continuation descs after overflow in xsk_build_skb()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/net/xdp_sock.h", "net/xdp/xsk.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ecd0d1cde0478c232a867f14ec99cf97aff5eb30", "status": "affected", "version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a", "versionType": "git"}, {"lessThan": "ceb00cb87a22c42d20c39336213db2b843ca9e34", "status": "affected", "version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a", "versionType": "git"}, {"lessThan": "5e94d74e4f3baebaa083288f33b4be7ce0a34982", "status": "affected", "version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a", "versionType": "git"}, {"lessThan": "bd44a6dcd4248883de90f5dad53ae80066e27096", "status": "affected", "version": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["include/net/xdp_sock.h", "net/xdp/xsk.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.6"}, {"lessThan": "6.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.44", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-74559", "lastModified": "2026-10-21T13:19:47.073", "metrics": {}, "published": "2026-08-15T13:18:01.390", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5e94d74e4f3baebaa083288f33b4be7ce0a34982"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bd44a6dcd4248883de90f5dad53ae80066e27096"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ceb00cb87a22c42d20c39336213db2b843ca9e34"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ecd0d1cde0478c232a867f14ec99cf97aff5eb30"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: xsk: drain continuation descs after overflow in xsk_build_skb()", "id": "2517044", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517044"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nxsk: drain continuation descs after overflow in xsk_build_skb()\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.", "A flaw was found in the Linux kernel's AF_XDP (eXpress Data Path) networking component. This vulnerability, located in the `xsk_build_skb()` function, involves improper handling of network packet descriptors. When processing large or malformed multi-buffer packets, the system fails to properly drain continuation descriptors after an overflow, leading to their silent loss. An attacker could exploit this issue by sending specially crafted packets, resulting in a denial of service that impacts network communication."], "name": "CVE-2026-74559", "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74559\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74559\nhttps://lore.kernel.org/linux-cve-announce/2026081552-CVE-2026-74559-0b2d@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cf24f5a5feeaae34c1a34d1e04f8ac697290427a,ceb00cb87a22c42d20c39336213db2b843ca9e34)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cf24f5a5feeaae34c1a34d1e04f8ac697290427a,5e94d74e4f3baebaa083288f33b4be7ce0a34982)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cf24f5a5feeaae34c1a34d1e04f8ac697290427a,bd44a6dcd4248883de90f5dad53ae80066e27096)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.44,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.8,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc6,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T15:00:04.340506+00:00", "updated": "2026-08-21T23:15:05.351229+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}