{"id":"CVE-2026-74707","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: validate metadata when processing requests\n\nThe zero-copy path validates TX metadata while obtaining the descriptor\ncontext, then reads it again later when prepari…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: validate metadata when processing requests\n\nThe zero-copy path validates TX metadata while obtaining the descriptor\ncontext, then reads it again later when prepari…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-20"],"vendor":"Linux","product":"Linux","affected":["Linux >= ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 < 5fd121971912dee2f5af1efec64462ac722deb17","Linux >= ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 < 0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba","Linux >= ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 < 849b1664dbda1cf6c63e0fd4f9dec23782b8c851","Linux d9d736c416c9a85f84e15435ba82a177262e745b","Linux >= 6.14.2 < 6.15","Linux 6.15"],"published":"2026-08-22","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:17:53.490","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74707","references":[{"url":"https://git.kernel.org/stable/c/0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5fd121971912dee2f5af1efec64462ac722deb17","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/849b1664dbda1cf6c63e0fd4f9dec23782b8c851","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74707.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-74707"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2521453"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74707"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74707"},{"url":"https://kernelcve.org/list/?q=CVE-2026-74707"},{"url":"https://lore.kernel.org/linux-cve-announce/2026082237-CVE-2026-74707-360f@gregkh/T"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00184,"epssPercentile":0.07893,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T19:15:08.406835Z"},"scores":{"nvd":7.8,"vendor":4.7},"ingestedAt":"2026-10-14T13:30:58.543Z","slug":"CVE-2026-74707","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nxsk: validate metadata when processing requests\n\nThe zero-copy path validates TX metadata while obtaining the descriptor\ncontext, then reads it again later when preparing the hardware request.\nUser space can change the metadata between those operations and bypass the\noriginal validation.\n\nValidate the metadata in xsk_tx_metadata_request() and use the resulting\nflags snapshot for every feature check. Read request fields once so all\nzero-copy drivers process only values observed after successful\nvalidation.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74707.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}