{"id":"CVE-2026-98062","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Mark signal tracepoint siginfo arguments as scalar\n\nThe signal_generate and signal_deliver tracepoints declare their info\nargument as a struct kernel_siginfo point…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Mark signal tracepoint siginfo arguments as scalar\n\nThe signal_generate and signal_deliver tracepoints declare their info\nargument as a struct kernel_siginfo point…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 838a10bd2ebfe11a60dd67687533a7cfc220cc86 < 0e78cb242a57e481061fcb542fed4d51afba25c4","Linux >= 838a10bd2ebfe11a60dd67687533a7cfc220cc86 < d2eaea3599bcce659ce91862254dc91bcbdb6351","Linux >= 838a10bd2ebfe11a60dd67687533a7cfc220cc86 < 77515ab12e4983e6416f8c35039a3f0c0822ac70","Linux b2fc4b17fc13810ef440fb323fad3981cd174985","Linux >= 6.12.6 < 6.13","Linux 6.13"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T11:17:35.220","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98062","references":[{"url":"https://git.kernel.org/stable/c/0e78cb242a57e481061fcb542fed4d51afba25c4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/77515ab12e4983e6416f8c35039a3f0c0822ac70","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d2eaea3599bcce659ce91862254dc91bcbdb6351","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-25T11:06:38.842Z","slug":"CVE-2026-98062","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Mark signal tracepoint siginfo arguments as scalar\n\nThe signal_generate and signal_deliver tracepoints declare their info\nargument as a struct kernel_siginfo pointer. btf_ctx_access() therefore\ntreats it as a trusted pointer for tp_btf programs.\n\nSignal delivery also uses SEND_SIG_NOINFO and SEND_SIG_PRIV as special\nvalues for this argument. Those values are zero and one respectively,\nand are not pointers. A tp_btf program can currently dereference either\nvalue and fault the kernel. In particular, signal_generate can run from\ntimer interrupt context, turning the fault into a kernel panic.\n\nRecord both tracepoints in raw_tp_null_args[] and mark argument one as\na non-pointer. This preserves scalar access to the cookie while rejecting\ndirect and helper-mediated pointer use. Merely marking it nullable would\nnot suffice because SEND_SIG_PRIV is nonzero.\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":[]}