{"id":"CVE-2026-92515","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Preserve unique-field state across nested structs\n\nbtf_find_struct_field() initializes a fresh seen mask for every recursive\ndescent","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Preserve unique-field state across nested structs\n\nbtf_find_struct_field() initializes a fresh seen mask for every recursive\ndescent. Unique special fields in diff…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 64e8ee814819f21beeeda00d4119221443d77992 < cec97102d4147e18568c93946014c4c8ebf86fcf","Linux >= 64e8ee814819f21beeeda00d4119221443d77992 < 28d5f20ed022ade0fb0bfbf50b78fec782083175","Linux >= 64e8ee814819f21beeeda00d4119221443d77992 < 373a1e9366e711b89bc5e45bd6edf33ef62402cd","Linux >= 64e8ee814819f21beeeda00d4119221443d77992 < f08619f060468076e4acbdc10e0713af20d60e65","Linux 6.11"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:54.360","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92515","references":[{"url":"https://git.kernel.org/stable/c/28d5f20ed022ade0fb0bfbf50b78fec782083175","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/373a1e9366e711b89bc5e45bd6edf33ef62402cd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cec97102d4147e18568c93946014c4c8ebf86fcf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f08619f060468076e4acbdc10e0713af20d60e65","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92515.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-92515"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536786"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92515"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92515"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-92515.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-17T16:21:47.778Z","epss":0.002,"epssPercentile":0.09779,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-694"],"slug":"CVE-2026-92515","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Preserve unique-field state across nested structs\n\nbtf_find_struct_field() initializes a fresh seen mask for every recursive\ndescent. Unique special fields in different levels of the same aggregate\ntherefore do not see one another. The duplicate fields can reach\nbtf_parse_fields(), where they trigger an invariant WARN_ON_ONCE(). A\ncrafted user BTF can consequently trigger the warning before map creation\nchecks capabilities.\n\nInitialize the seen mask once in btf_find_field() and pass the same pointer\nthrough struct, datasec, and nested-struct walks. This gives the entire field\ntraversal one shared uniqueness state.\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** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92515.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225479,"id":"CVE-2026-92515","ts":1792498265112,"field":"cvss","old":null,"new":"5.5"},{"seq":225478,"id":"CVE-2026-92515","ts":1792498265112,"field":"severity","old":"none","new":"medium"}]}