{"id":"CVE-2026-74305","summary":"bpf: Tighten cgroup storage cookie checks for prog arrays","details":"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 -\u003e B(no storage) -\u003e 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 -\u003e B(no storage) working\nwhile rejecting the A -\u003e B(no storage) -\u003e C(storage) bridge.","modified":"2026-10-24T02:30:17.465778165Z","published":"2026-08-15T05:58:06.654Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74305.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/10627ddc0167aab5c1c390a10ef461e9937aba08"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1c762d28698483ce7c372091f34d86e4d4828652"},{"type":"WEB","url":"https://git.kernel.org/stable/c/46fbafe3d2d569d828e8d24a7dbe1659f63685cf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/87177497cca90bf4fcfb759eb898560eb5b46a10"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9ca06849c4239aa2d580c54651f8588c51cb398b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cb22dc79528eb26a46d346c3118dbd6b14c70609"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb73056ce2a6f101ddd3bdba89af6b24ebffff85"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74305.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74305"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c1c74584b9b4043c52e41fec415226e582d266a3"},{"fixed":"87177497cca90bf4fcfb759eb898560eb5b46a10"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"66da7cee78590259b400e51a70622ccd41da7bb2"},{"fixed":"1c762d28698483ce7c372091f34d86e4d4828652"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7acfa07c585e3d7a64654d38f0a5c762877d0b9b"},{"fixed":"eb73056ce2a6f101ddd3bdba89af6b24ebffff85"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"41688d1fc5d163a6c2c0e95c0419e2cb31a44648"},{"fixed":"9ca06849c4239aa2d580c54651f8588c51cb398b"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"abad3d0bad72a52137e0c350c59542d75ae4f513"},{"fixed":"46fbafe3d2d569d828e8d24a7dbe1659f63685cf"},{"fixed":"cb22dc79528eb26a46d346c3118dbd6b14c70609"},{"fixed":"10627ddc0167aab5c1c390a10ef461e9937aba08"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.192"},{"fixed":"5.15.212"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.1.151"},{"fixed":"6.1.178"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.6.105"},{"fixed":"6.6.145"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.12.46"},{"fixed":"6.12.97"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.16.1"},{"fixed":"6.17"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"19341d5c59e8c7e8528e40f8663e99d67810473c"}]}],"versions":["v5.15.211","v5.15.210","v5.15.209","v5.15.208","v5.15.207","v5.15.206","v5.15.205","v5.15.204","v5.15.203","v5.15.202","v5.15.201","v5.15.200","v5.15.199","v5.15.198","v5.15.197","v5.15.196","v5.15.195","v5.15.194","v5.15.193","v5.15.192","v6.1.177","v6.1.176","v6.1.175","v6.1.174","v6.1.173","v6.1.172","v6.1.171","v6.1.170","v6.1.169","v6.1.168","v6.1.167","v6.1.166","v6.1.165","v6.1.164","v6.1.163","v6.1.162","v6.1.161","v6.1.160","v6.1.159","v6.1.158","v6.1.157","v6.1.156","v6.1.155","v6.1.154","v6.1.153","v6.1.152","v6.1.151","v6.6.144","v6.6.143","v6.6.142","v6.6.141","v6.6.140","v6.6.139","v6.6.138","v6.6.137","v6.6.136","v6.6.135","v6.6.134","v6.6.133","v6.6.132","v6.6.131","v6.6.130","v6.6.129","v6.6.128","v6.6.127","v6.6.126","v6.6.125","v6.6.124","v6.6.123","v6.6.122","v6.6.121","v6.6.120","v6.6.119","v6.6.118","v6.6.117","v6.6.116","v6.6.115","v6.6.114","v6.6.113","v6.6.112","v6.6.111","v6.6.110","v6.6.109","v6.6.108","v6.6.107","v6.6.106","v6.6.105","v6.12.96","v6.12.95","v6.12.94","v6.12.93","v6.12.92","v6.12.91","v6.12.90","v6.12.89","v6.12.88","v6.12.87","v6.12.86","v6.12.85","v6.12.84","v6.12.83","v6.12.82","v6.12.81","v6.12.80","v6.12.79","v6.12.78","v6.12.77","v6.12.76","v6.12.75","v6.12.74","v6.12.73","v6.12.72","v6.12.71","v6.12.70","v6.12.69","v6.12.68","v6.12.67","v6.12.66","v6.12.65","v6.12.64","v6.12.63","v6.12.62","v6.12.61","v6.12.60","v6.12.59","v6.12.58","v6.12.57","v6.12.56","v6.12.55","v6.12.54","v6.12.53","v6.12.52","v6.12.51","v6.12.50","v6.12.49","v6.12.48","v6.12.47","v6.12.46","v6.16.12","v6.16.11","v6.16.10","v6.16.9","v6.16.8","v6.16.7","v6.16.6","v6.16.5","v6.16.4","v6.16.3","v6.16.2","v6.16.1"],"database_specific":{"source":"https://storag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