{"id":"CVE-2025-38060","revision":"77e19b2ff744490ca822be7a8a942a04","records":[{"revision":"77e19b2ff744490ca822be7a8a942a04","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-38060","aliases":[],"title":"bpf: copy_verifier_state() should copy 'loop_entry' field","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: copy_verifier_state() should copy 'loop_entry' field\n\nThe bpf_verifier_state.loop_entry state should be copied by\ncopy_verifier_state(). Otherwise, .loop_entry values from unrelated\nstates would poison env->cur_state.\n\nAdditionally, env->stack should not contain any states with\n.loop_entry != NULL. The states in env->stack are yet to be verified,\nwhile .loop_entry is set for states that reached an equivalent state.\nThis means that env->cur_state->loop_entry should always be NULL after\npop_stack().\n\nSee the selftest in the next commit for an example of the program that\nis not safe yet is accepted by verifier w/o this fix.\n\nThis change has some verification performance impact for selftests:\n\nFile Program Insns (A) Insns (B) Insns (DIFF) States (A) States (B) States (DIFF)\n---------------------------------- ---------------------------- --------- --------- -------------- ---------- ---------- -------------\narena_htab.bpf.o arena_htab_llvm 717 426 -291 (-40.59%) 57 37 -20 (-35.09%)\narena_htab_asm.bpf.o arena_htab_asm 597 445 -152 (-25.46%) 47 37 -10 (-21.28%)\narena_list.bpf.o arena_list_del 309 279 -30 (-9.71%) 23 14 -9 (-39.13%)\niters.bpf.o iter_subprog_check_stacksafe 155 141 -14 (-9.03%) 15 14 -1 (-6.67%)\niters.bpf.o iter_subprog_iters 1094 1003 -91 (-8.32%) 88 83 -5 (-5.68%)\niters.bpf.o loop_state_deps2 479 725 +246 (+51.36%) 46 63 +17 (+36.96%)\nkmem_cache_iter.bpf.o open_coded_iter 63 59 -4 (-6.35%) 7 6 -1 (-14.29%)\nverifier_bits_iter.bpf.o max_words 92 84 -8 (-8.70%) 8 7 -1 (-12.50%)\nverifier_iterating_callbacks.bpf.o cond_break2 113 107 -6 (-5.31%) 12 12 +0 (+0.00%)\n\nAnd significant negative impact for sched_ext:\n\nFile Program Insns (A) Insns (B) Insns (DIFF) States (A) States (B) States (DIFF)\n----------------- ---------------------- --------- --------- -------------------- ---------- ---------- ------------------\nbpf.bpf.o lavd_init 7039 14723 +7684 (+109.16%) 490 1139 +649 (+132.45%)\nbpf.bpf.o layered_dispatch 11485 10548 -937 (-8.16%) 848 762 -86 (-10.14%)\nbpf.bpf.o layered_dump 7422 1000001 +992579 (+13373.47%) 681 31178 +30497 (+4478.27%)\nbpf.bpf.o layered_enqueue 16854 71127 +54273 (+322.02%) 1611 6450 +4839 (+300.37%)\nbpf.bpf.o p2dq_dispatch 665 791 +126 (+18.95%) 68 78 +10 (+14.71%)\nbpf.bpf.o p2dq_init 2343 2980 +637 (+27.19%) 201 237 +36 (+17.91%)\nbpf.bpf.o refresh_layer_cpumasks 16487 674760 +658273 (+3992.68%) 1770 65370 +63600 (+3593.22%)\nbpf.bpf.o rusty_select_cpu 1937 40872 +38935 (+2010.07%) 177 3210 +3033 (+1713.56%)\nscx_central.bpf.o central_dispatch 636 2687 +2051 (+322.48%) 63 227 +164 (+260.32%)\nscx_nest.bpf.o nest_init 636 815 +179 (+28.14%) 60 73 +13 (+21.67%)\nscx_qmap.bpf.o qmap_dispatch \n---truncated---","state":0,"publishedAt":"2025-06-18T09:33:39.61+00:00","modifiedAt":"2026-10-21T12:36:41.334+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\": \"c8f6d285825f61d619c4c2509bfd75eb366db900\",\n \"lessThan\": \"b7867e55cbcbaed8498b6b96855371eb9afebdc7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2a0992829ea3864939d917a5c7b48be6629c6217\",\n \"lessThan\": \"46ba5757a7a4714e7d3f68cfe118208822cb3d78\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2a0992829ea3864939d917a5c7b48be6629c6217\",\n \"lessThan\": \"8b4afd89fa75f738a80ca849126fd3cad77bcbf1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2a0992829ea3864939d917a5c7b48be6629c6217\",\n \"lessThan\": \"bbbc02b7445ebfda13e4847f4f1413c6480a85a9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6.6.15\",\n \"lessThan\": \"6.6.160\",\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/verifier.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.7\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.7\",\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\": \"6.12.31\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.14.9\",\n \"lessThanOrEqual\": \"6.14.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.15\",\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/b7867e55cbcbaed8498b6b96855371eb9afebdc7","https://git.kernel.org/stable/c/46ba5757a7a4714e7d3f68cfe118208822cb3d78","https://git.kernel.org/stable/c/8b4afd89fa75f738a80ca849126fd3cad77bcbf1","https://git.kernel.org/stable/c/bbbc02b7445ebfda13e4847f4f1413c6480a85a9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38060","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-38060","identifiers":["CVE-2025-38060"]},"retained":false,"historicalAffected":[]}],"coverage":[]}