{"id":"CVE-2026-98075","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: reject BPF_PSEUDO_FUNC reference to the main program\n\nfixups.c:jit_subprogs() rewrites BPF_PSEUDO_FUNC loads to contain real\nfunction addresses","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: reject BPF_PSEUDO_FUNC reference to the main program\n\nfixups.c:jit_subprogs() rewrites BPF_PSEUDO_FUNC loads to contain real\nfunction addresses. This function is i…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-824","CWE-20"],"vendor":"Linux","product":"Linux","affected":["Linux >= 69c087ba6225b574afb6e505b72cb75242a3d844 < c74750dca96f40a1adb9d334f5a3152f44b270c3","Linux >= 69c087ba6225b574afb6e505b72cb75242a3d844 < 314c8caa9cb64ad60c5b969fe9a3e2dcdccf156f","Linux >= 69c087ba6225b574afb6e505b72cb75242a3d844 < 8cb75f7ada25b1cf25f2f74dec3ba649b9064a09","Linux >= 69c087ba6225b574afb6e505b72cb75242a3d844 < 118212417ba0120d99f84154799f8880f07411f4","Linux >= 69c087ba6225b574afb6e505b72cb75242a3d844 < d6c39774ae093c9f7009cc4ae918f18fc1af7ae7","Linux >= 69c087ba6225b574afb6e505b72cb75242a3d844 < 92f0bd0e2b632c6565ac2214a4d7d2ed37e5b9f6","Linux >= 69c087ba6225b574afb6e505b72cb75242a3d844 < 374b2c5561db80fcdd7cdce44af37a49416f61c7","Linux 5.13"],"published":"2026-09-25","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:18:28.910","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98075","references":[{"url":"https://git.kernel.org/stable/c/118212417ba0120d99f84154799f8880f07411f4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/314c8caa9cb64ad60c5b969fe9a3e2dcdccf156f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/374b2c5561db80fcdd7cdce44af37a49416f61c7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8cb75f7ada25b1cf25f2f74dec3ba649b9064a09","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/92f0bd0e2b632c6565ac2214a4d7d2ed37e5b9f6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c74750dca96f40a1adb9d334f5a3152f44b270c3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d6c39774ae093c9f7009cc4ae918f18fc1af7ae7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98075.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98075"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541251"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98075"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98075"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98075.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-98075"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00173,"epssPercentile":0.0663,"cvssSource":"vendor","ingestedAt":"2026-09-25T11:06:38.838Z","slug":"CVE-2026-98075","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: reject BPF_PSEUDO_FUNC reference to the main program\n\nfixups.c:jit_subprogs() rewrites BPF_PSEUDO_FUNC loads to contain real\nfunction addresses. This function is invoked from bpf_jit_subprogs()\nonly when env->subprog_cnt > 1. Meaning that for any program like\nbelow:\n\n  int main(void *ctx) {\n    void *ptr = main;\n    ...\n    bpf_timer_set_callback(..., ptr);\n    ...\n  }\n\nThe 'ptr' won't be ever converted to contain an address.\nIn combination with e.g. bpf_timer_set_callback() this would lead to a\nfunction call at a bogus address.\n\nInstead of complicating the implementation, just assume that no useful\nprogram needs main to be a sync or async callback and reject\nBPF_PSEUDO_FUNC loads for the main subprogram.\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 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98075.json)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":212353,"id":"CVE-2026-98075","ts":1790668156758,"field":"cvss","old":null,"new":"7"},{"seq":212352,"id":"CVE-2026-98075","ts":1790668156758,"field":"severity","old":"none","new":"high"}]}