{"id":"CVE-2026-98062","revision":"35908ac1df964eb4a84dda6ea7d7a329","records":[{"revision":"35908ac1df964eb4a84dda6ea7d7a329","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98062","aliases":[],"title":"bpf: Mark signal tracepoint siginfo arguments as scalar","description":"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 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.","state":0,"publishedAt":"2026-09-25T10:24:06.597+00:00","modifiedAt":"2026-10-21T12:54:20.506+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/bpf/btf.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"b2fc4b17fc13810ef440fb323fad3981cd174985\",\n                            \"lessThan\": \"05757377fa0447163d07c43a119f81abe1eef8dc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"838a10bd2ebfe11a60dd67687533a7cfc220cc86\",\n                            \"lessThan\": \"0e78cb242a57e481061fcb542fed4d51afba25c4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"838a10bd2ebfe11a60dd67687533a7cfc220cc86\",\n                            \"lessThan\": \"d2eaea3599bcce659ce91862254dc91bcbdb6351\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"838a10bd2ebfe11a60dd67687533a7cfc220cc86\",\n                            \"lessThan\": \"77515ab12e4983e6416f8c35039a3f0c0822ac70\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.12.6\",\n                            \"lessThan\": \"6.12.114\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/bpf/btf.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.13\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.114\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/05757377fa0447163d07c43a119f81abe1eef8dc","https://git.kernel.org/stable/c/0e78cb242a57e481061fcb542fed4d51afba25c4","https://git.kernel.org/stable/c/d2eaea3599bcce659ce91862254dc91bcbdb6351","https://git.kernel.org/stable/c/77515ab12e4983e6416f8c35039a3f0c0822ac70"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98062","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98062","identifiers":["CVE-2026-98062"]},"retained":false,"historicalAffected":[]}],"coverage":[]}