{"id":"CVE-2022-50168","revision":"b41921d02a0f48e0917017c524939b21","records":[{"revision":"b41921d02a0f48e0917017c524939b21","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2022-50168","aliases":[],"title":"bpf, x86: fix freeing of not-finalized bpf_prog_pack","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, x86: fix freeing of not-finalized bpf_prog_pack\n\nsyzbot reported a few issues with bpf_prog_pack [1], [2]. This only happens\nwith multiple subprogs. In jit_subprogs(), we first call bpf_int_jit_compile()\non each sub program. And then, we call it on each sub program again. jit_data\nis not freed in the first call of bpf_int_jit_compile(). Similarly we don't\ncall bpf_jit_binary_pack_finalize() in the first call of bpf_int_jit_compile().\n\nIf bpf_int_jit_compile() failed for one sub program, we will call\nbpf_jit_binary_pack_finalize() for this sub program. However, we don't have a\nchance to call it for other sub programs. Then we will hit \"goto out_free\" in\njit_subprogs(), and call bpf_jit_free on some subprograms that haven't got\nbpf_jit_binary_pack_finalize() yet.\n\nAt this point, bpf_jit_binary_pack_free() is called and the whole 2MB page is\nfreed erroneously.\n\nFix this with a custom bpf_jit_free() for x86_64, which calls\nbpf_jit_binary_pack_finalize() if necessary. Also, with custom\nbpf_jit_free(), bpf_prog_aux->use_bpf_prog_pack is not needed any more,\nremove it.\n\n[1] https://syzkaller.appspot.com/bug?extid=2f649ec6d2eea1495a8f\n[2] https://syzkaller.appspot.com/bug?extid=87f65c75f4a72db05445","state":0,"publishedAt":"2025-06-18T11:03:21.593+00:00","modifiedAt":"2026-10-15T21:31:18.723+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                        \"arch/x86/net/bpf_jit_comp.c\",\n                        \"include/linux/bpf.h\",\n                        \"include/linux/filter.h\",\n                        \"kernel/bpf/core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1022a5498f6f745c3b5fd3f050a5e11e7ca354f0\",\n                            \"lessThan\": \"f91ce608a79c0db3e72bd63c23e011a9ebc31505\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1022a5498f6f745c3b5fd3f050a5e11e7ca354f0\",\n                            \"lessThan\": \"60e66074812dde9cde3d99cdd3caa9e40f1a4516\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1022a5498f6f745c3b5fd3f050a5e11e7ca354f0\",\n                            \"lessThan\": \"1d5f82d9dd477d5c66e0214a68c3e4f308eadd6d\",\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                        \"arch/x86/net/bpf_jit_comp.c\",\n                        \"include/linux/bpf.h\",\n                        \"include/linux/filter.h\",\n                        \"kernel/bpf/core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.18\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.18.18\",\n                            \"lessThanOrEqual\": \"5.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.19.2\",\n                            \"lessThanOrEqual\": \"5.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.0\",\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/f91ce608a79c0db3e72bd63c23e011a9ebc31505","https://git.kernel.org/stable/c/60e66074812dde9cde3d99cdd3caa9e40f1a4516","https://git.kernel.org/stable/c/1d5f82d9dd477d5c66e0214a68c3e4f308eadd6d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-50168","license":"CVE Program Terms of Use","key":"cve-program:CVE-2022-50168","identifiers":["CVE-2022-50168"]},"retained":false,"historicalAffected":[]}],"coverage":[]}