{"id":"CVE-2026-93144","revision":"e2d59e57032946649a074a8de3dbb2ae","records":[{"revision":"e2d59e57032946649a074a8de3dbb2ae","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93144","aliases":[],"title":"bpf: Reject writes through untrusted BTF pointers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject writes through untrusted BTF pointers\n\ncheck_ptr_to_btf_access() lets program-type btf_struct_access callbacks\nvalidate writes before the default BTF access path rejects non-read\naccesses. That bypasses the read-only policy for untrusted BTF pointers\ncreated by helpers such as bpf_rdonly_cast().\n\nReject non-read accesses through PTR_UNTRUSTED BTF pointers at the\ncommon entry point, before the callback branch to handle all cases.","state":0,"publishedAt":"2026-09-17T16:11:42.757+00:00","modifiedAt":"2026-10-21T12:52:02.003+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/verifier.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"282de143ead96a5d53331e946f31c977b4610a74\",\n                            \"lessThan\": \"56f92fecd80419567288b7972caa90107033836e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"282de143ead96a5d53331e946f31c977b4610a74\",\n                            \"lessThan\": \"c4dc883447ae38c4e22a29cc016046fa65d88994\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"282de143ead96a5d53331e946f31c977b4610a74\",\n                            \"lessThan\": \"644cf4e77c2770d4246f6d12f99bc80d253b0ec6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"282de143ead96a5d53331e946f31c977b4610a74\",\n                            \"lessThan\": \"19d5566b84ca1af0256d0d0003e1a081580c3ba3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"282de143ead96a5d53331e946f31c977b4610a74\",\n                            \"lessThan\": \"ac65c710cc643cbc52b899627577357867249530\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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/verifier.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.160\",\n                            \"lessThanOrEqual\": \"6.6.*\",\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\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\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":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/56f92fecd80419567288b7972caa90107033836e","https://git.kernel.org/stable/c/c4dc883447ae38c4e22a29cc016046fa65d88994","https://git.kernel.org/stable/c/644cf4e77c2770d4246f6d12f99bc80d253b0ec6","https://git.kernel.org/stable/c/19d5566b84ca1af0256d0d0003e1a081580c3ba3","https://git.kernel.org/stable/c/ac65c710cc643cbc52b899627577357867249530"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93144","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93144","identifiers":["CVE-2026-93144"]},"retained":false,"historicalAffected":[]}],"coverage":[]}