{"id":"CVE-2026-92485","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-92485","summary":"bpf: Fix WARNING in bpf_tracing_link_release","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix WARNING in bpf_tracing_link_release\n\nThe trampoline could be corrupted by the blindly\n'tr->flags = BPF_TRAMP_F_TAIL_CALL_CTX' in verifier.\n\n1. A fexit attached to a tail_call_reachable prog. 'tr->flags' became\n   'BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_TAIL_CALL_CTX'. And, the\n   trampoline would poke the target prog's nop insn using jmp insn instead\n   of call insn.\n2. Another fexit loaded with the same tail_call_reachable prog target.\n   'tr->flags' became 'BPF_TRAMP_F_TAIL_CALL_CTX'.\n3. Close the first fexit link. Due to no BPF_TRAMP_F_CALL_ORIG in\n   'tr->flags', the trampoline will fail to restore the prog's nop insn\n   using call insn.\n\n[    3.410719] WARNING: kernel/bpf/syscall.c:3551 at bpf_tracing_link_release+0x53/0x60, CPU#1: test_progs/98\n...\n[    3.428793]  bpf_link_free+0x58/0x130\n[    3.429293]  bpf_link_release+0x23/0x30\n\nFix the warning by updating 'tr->flags' with '|=' and lock.","published":"2026-09-17T16:10:00.999Z","modified":"2026-09-19T03:47:26.443291304Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"7.2.6"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/48a0209d8da0d90a7b0a0db19d1ff88027b13781"},{"type":"WEB","url":"https://git.kernel.org/stable/c/61aaa8782bec59ecffd22e030f54ef9351bcabf9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92485.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92485"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-19T03:47:26.443291304Z"}}