{"id":"CVE-2026-90299","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix sleepable check for tracing/lsm prog\n\nWhen CONFIG_FUNCTION_ERROR_INJECTION is disabled, a sleepable tracing prog\nis allowed to attach to '__x64_'-alike prefix …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix sleepable check for tracing/lsm prog\n\nWhen CONFIG_FUNCTION_ERROR_INJECTION is disabled, a sleepable tracing prog\nis allowed to attach to '__x64_'-alike prefix …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 16d9c5660692d6f0e6aba367274de2b6dfd4343c < 976f1be72740cfbc351d3841fd21186dda3ea723","Linux >= 16d9c5660692d6f0e6aba367274de2b6dfd4343c < 00244bdaa423d93f4571f3f6854378ce3365e524","Linux 7.1"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:27.403","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90299","references":[{"url":"https://git.kernel.org/stable/c/00244bdaa423d93f4571f3f6854378ce3365e524","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/976f1be72740cfbc351d3841fd21186dda3ea723","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.830Z","epss":0.00204,"epssPercentile":0.10654,"slug":"CVE-2026-90299","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix sleepable check for tracing/lsm prog\n\nWhen CONFIG_FUNCTION_ERROR_INJECTION is disabled, a sleepable tracing prog\nis allowed to attach to '__x64_'-alike prefix symbols.\n\nIt is because the verifier does not verify whether the symbol is a kernel\nfunction or a bpf prog. That said, a sleepable tracing prog is allowed to\nattach to a bpf prog target whose name has '__x64_'-alike prefix.\n\nFor example, a sleepable fentry prog attaches to a '__x64_sys_nop' XDP\nprog, and copies buffer from a user pointer with bpf_copy_from_user()\nhelper. After attaching the XDP prog to lo interface, the kernel BUG\ncould be triggered by 'ping -c 1 -W 1 127.0.0.1':\n\n[    3.460756] BUG: sleeping function called from invalid context at kernel/bpf/trampoline.c:1324\n\nFix it by disallowing sleepable prog always when its target\nbtf is not a kernel's btf.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}