{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98064",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:19:56.073Z",
        "datePublished": "2026-09-25T10:24:07.811Z",
        "dateUpdated": "2026-10-19T09:13:14.000Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:13:14.000Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix NULL-ptr-deref when showing a void BTF type\n\nbtf_modifier_show() resolves the modifier and then calls\nbtf_type_ops(t)->show() unconditionally. For the void type (type_id 0,\nBTF_KIND_UNKN) kind_ops[] has no entry, so ->show is NULL.\n\nA \"const void\" (a modifier resolving to void) cannot be a map key or\nvalue - map_check_btf() rejects it because void has no size - so the map\ndump path does not reach it. But bpf_snprintf_btf() takes a type_id\nstraight from the BPF program, and passing such a \"const void\" from the\nvmlinux BTF NULL-derefs:\n\nKASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]\nRIP: 0010:btf_modifier_show (kernel/bpf/btf.c:2914)\nCall Trace:\n <TASK>\n btf_type_show (kernel/bpf/btf.c:8251)\n btf_type_snprintf_show (kernel/bpf/btf.c:8321)\n bpf_snprintf_btf (kernel/trace/bpf_trace.c:1047)\n bpf_prog_test_run_raw_tp (net/bpf/test_run.c:829)\n __sys_bpf (kernel/bpf/syscall.c:4804)\n do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n </TASK>\n\nFall back to btf_df_show() when the resolved type has no show op; it\nemits the \"<unsupported kind:N>\" placeholder already used for kinds like\nFWD and FUNC. bpf_snprintf_btf() then returns the length as usual."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/bpf/btf.c"
                    ],
                    "versions": [
                        {
                            "version": "c4d0bfb45068d853a478b9067a95969b1886a30f",
                            "lessThan": "cf528f2d7a0a54f2a3c6d439cfa3c8d7dfe90d8d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c4d0bfb45068d853a478b9067a95969b1886a30f",
                            "lessThan": "adb15557a641cb8a31f83e5f62bd12042b138c7b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c4d0bfb45068d853a478b9067a95969b1886a30f",
                            "lessThan": "62b00074b58ccf43f61f70f2cfcac80937b530c6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c4d0bfb45068d853a478b9067a95969b1886a30f",
                            "lessThan": "86d86f9fcf62dd3654090fbf3cf7ae5f42aa0706",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c4d0bfb45068d853a478b9067a95969b1886a30f",
                            "lessThan": "717abdfd1d559d01fdd102023f0a990fb0437240",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c4d0bfb45068d853a478b9067a95969b1886a30f",
                            "lessThan": "98f1cb95221332139acf514350ae2cae3b8656c5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c4d0bfb45068d853a478b9067a95969b1886a30f",
                            "lessThan": "5324f4e75ff6e9c2ca2e267c5f34f0937f9d0ac9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c4d0bfb45068d853a478b9067a95969b1886a30f",
                            "lessThan": "4ea508b9ebd78bce7f212166d2e2cba66b875f08",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/bpf/btf.c"
                    ],
                    "versions": [
                        {
                            "version": "5.10",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.10",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.111",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.7",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "5.15.222"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionStartIncluding": "5.10",
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                                {
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                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "7.2.7"
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                                    "versionEndExcluding": "7.3"
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                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/cf528f2d7a0a54f2a3c6d439cfa3c8d7dfe90d8d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/adb15557a641cb8a31f83e5f62bd12042b138c7b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/62b00074b58ccf43f61f70f2cfcac80937b530c6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/86d86f9fcf62dd3654090fbf3cf7ae5f42aa0706"
                },
                {
                    "url": "https://git.kernel.org/stable/c/717abdfd1d559d01fdd102023f0a990fb0437240"
                },
                {
                    "url": "https://git.kernel.org/stable/c/98f1cb95221332139acf514350ae2cae3b8656c5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5324f4e75ff6e9c2ca2e267c5f34f0937f9d0ac9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4ea508b9ebd78bce7f212166d2e2cba66b875f08"
                }
            ],
            "title": "bpf: Fix NULL-ptr-deref when showing a void BTF type",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}