{"id":"CVE-2025-68208","revision":"df267aa63a1141c488ba241aeda9b9bb","records":[{"revision":"df267aa63a1141c488ba241aeda9b9bb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-68208","aliases":[],"title":"bpf: account for current allocated stack depth in widen_imprecise_scalars()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: account for current allocated stack depth in widen_imprecise_scalars()\n\nThe usage pattern for widen_imprecise_scalars() looks as follows:\n\n    prev_st = find_prev_entry(env, ...);\n    queued_st = push_stack(...);\n    widen_imprecise_scalars(env, prev_st, queued_st);\n\nWhere prev_st is an ancestor of the queued_st in the explored states\ntree. This ancestor is not guaranteed to have same allocated stack\ndepth as queued_st. E.g. in the following case:\n\n    def main():\n      for i in 1..2:\n        foo(i)        // same callsite, differnt param\n\n    def foo(i):\n      if i == 1:\n        use 128 bytes of stack\n      iterator based loop\n\nHere, for a second 'foo' call prev_st->allocated_stack is 128,\nwhile queued_st->allocated_stack is much smaller.\nwiden_imprecise_scalars() needs to take this into account and avoid\naccessing bpf_verifier_state->frame[*]->stack out of bounds.","state":0,"publishedAt":"2025-12-16T13:48:35.298+00:00","modifiedAt":"2026-10-15T22:02:47.833+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\": \"ab470fefce2837e66b771c60858118d50bb5bb10\",\n                            \"lessThan\": \"64b12dca2b0abcb5fc0542887d18b926ea5cf711\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2793a8b015f7f1caadb9bce9c63dc659f7522676\",\n                            \"lessThan\": \"9944c7938cd5b3f37b0afec0481c7c015e4f1c58\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2793a8b015f7f1caadb9bce9c63dc659f7522676\",\n                            \"lessThan\": \"57e04e2ff56e32f923154f0f7bc476fcb596ffe7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2793a8b015f7f1caadb9bce9c63dc659f7522676\",\n                            \"lessThan\": \"b0c8e6d3d866b6a7f73877f71968dbffd27b7785\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.6.15\",\n                            \"lessThan\": \"6.6.117\",\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\": \"6.6.117\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.59\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.17.9\",\n                            \"lessThanOrEqual\": \"6.17.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18\",\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/64b12dca2b0abcb5fc0542887d18b926ea5cf711","https://git.kernel.org/stable/c/9944c7938cd5b3f37b0afec0481c7c015e4f1c58","https://git.kernel.org/stable/c/57e04e2ff56e32f923154f0f7bc476fcb596ffe7","https://git.kernel.org/stable/c/b0c8e6d3d866b6a7f73877f71968dbffd27b7785"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-68208","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-68208","identifiers":["CVE-2025-68208"]},"retained":false,"historicalAffected":[]}],"coverage":[]}