{"id":"CVE-2026-74305","revision":"60b24260f8ec43688c4de5bc317afe08","records":[{"revision":"60b24260f8ec43688c4de5bc317afe08","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74305","aliases":[],"title":"bpf: Tighten cgroup storage cookie checks for prog arrays","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Tighten cgroup storage cookie checks for prog arrays\n\nThe fix in commit abad3d0bad72 (\"bpf: Fix oob access in cgroup local\nstorage\") is still incomplete. The prog-array compatibility check\ntreats a program with no cgroup storage as compatible with any stored\nstorage cookie. This allows a storage-less program to bridge a tail\ncall chain between an entry program and a storage-using callee even\nthough cgroup local storage at runtime still follows the caller's\ncontext, that is, A -> B(no storage) -> C(storage) path.\n\nRequiring exact cookie equality would break the legitimate case of a\nstorage-less leaf program being tail called from a storage-using one.\nInstead, only accept a zero storage cookie if the program cannot\nperform tail calls itself. This keeps A -> B(no storage) working\nwhile rejecting the A -> B(no storage) -> C(storage) bridge.","state":0,"publishedAt":"2026-08-15T05:58:06.654+00:00","modifiedAt":"2026-10-16T18:55:31.883+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/core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c1c74584b9b4043c52e41fec415226e582d266a3\",\n                            \"lessThan\": \"87177497cca90bf4fcfb759eb898560eb5b46a10\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"66da7cee78590259b400e51a70622ccd41da7bb2\",\n                            \"lessThan\": \"1c762d28698483ce7c372091f34d86e4d4828652\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7acfa07c585e3d7a64654d38f0a5c762877d0b9b\",\n                            \"lessThan\": \"eb73056ce2a6f101ddd3bdba89af6b24ebffff85\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"41688d1fc5d163a6c2c0e95c0419e2cb31a44648\",\n                            \"lessThan\": \"9ca06849c4239aa2d580c54651f8588c51cb398b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"abad3d0bad72a52137e0c350c59542d75ae4f513\",\n                            \"lessThan\": \"46fbafe3d2d569d828e8d24a7dbe1659f63685cf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"abad3d0bad72a52137e0c350c59542d75ae4f513\",\n                            \"lessThan\": \"cb22dc79528eb26a46d346c3118dbd6b14c70609\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"abad3d0bad72a52137e0c350c59542d75ae4f513\",\n                            \"lessThan\": \"10627ddc0167aab5c1c390a10ef461e9937aba08\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"19341d5c59e8c7e8528e40f8663e99d67810473c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.15.192\",\n                            \"lessThan\": \"5.15.212\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.151\",\n                            \"lessThan\": \"6.1.178\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.105\",\n                            \"lessThan\": \"6.6.145\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.46\",\n                            \"lessThan\": \"6.12.97\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.16.1\",\n                            \"lessThan\": \"6.17\",\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/core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.17\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.17\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.212\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.178\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\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/87177497cca90bf4fcfb759eb898560eb5b46a10","https://git.kernel.org/stable/c/1c762d28698483ce7c372091f34d86e4d4828652","https://git.kernel.org/stable/c/eb73056ce2a6f101ddd3bdba89af6b24ebffff85","https://git.kernel.org/stable/c/9ca06849c4239aa2d580c54651f8588c51cb398b","https://git.kernel.org/stable/c/46fbafe3d2d569d828e8d24a7dbe1659f63685cf","https://git.kernel.org/stable/c/cb22dc79528eb26a46d346c3118dbd6b14c70609","https://git.kernel.org/stable/c/10627ddc0167aab5c1c390a10ef461e9937aba08"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74305","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74305","identifiers":["CVE-2026-74305"]},"retained":false,"historicalAffected":[]}],"coverage":[]}