{"id":"CVE-2026-80592","summary":"samples/damon/mtier: fail early if address range parameters are invalid","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsamples/damon/mtier: fail early if address range parameters are invalid\n\nThe comment on top of `struct damon_region` clearly says that\n\n    For any use case, @ar should be non-zero positive size.\n\nwhich is now verified in damon_verify_new_region() if the kernel is built\nwith DAMON_DEBUG_SANITY.\n\nThe WARN_ONCE() can be triggered if the mtier sample module is enabled\nbefore node{0,1}_{start,end}_addr have been properly initialized, which is\nobviously not good.\n\n ------------[ cut here ]------------\n start 0 \u003e= end 0\n WARNING: mm/damon/core.c:217 at damon_new_region+0xf4/0x118, CPU#59: bash/341468\n Call trace:\n  damon_new_region+0xf4/0x118 (P)\n  damon_set_regions+0xfc/0x3c0\n  damon_sample_mtier_build_ctx+0xe8/0x3a8\n  damon_sample_mtier_start+0x1c/0x90\n  damon_sample_mtier_enable_store+0x98/0xb0\n  param_attr_store+0xb4/0x128\n  module_attr_store+0x2c/0x50\n  sysfs_kf_write+0x58/0x90\n  kernfs_fop_write_iter+0x16c/0x238\n  vfs_write+0x2c0/0x370\n  ksys_write+0x74/0x118\n  __arm64_sys_write+0x24/0x38\n  invoke_syscall+0xa8/0x118\n  el0_svc_common.constprop.0+0x48/0xf0\n  do_el0_svc+0x24/0x38\n  el0_svc+0x54/0x370\n  el0t_64_sync_handler+0xa0/0xe8\n  el0t_64_sync+0x1ac/0x1b0\n ---[ end trace 0000000000000000 ]---\n\nNote that the same issue can happen if detect_node_addresses is true, and\nnode 0 or 1 is memoryless.  Fix it together by checking the validity of\nparameters right before damon_new_region() and fail early if they're\ninvalid.","modified":"2026-08-30T03:47:57.244057731Z","published":"2026-08-28T06:48:20.218Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80592.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/7746d72c64054976887928d64d2caf25c5a6dcc0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9d360fb820a3b9576d155e720ec44fef54d2efb5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/db20589d7b248211f63f4a7f642a49c0832b13ae"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80592.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80592"},{"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":"82a08bde3cf7bbbe90de57baa181bebf676582c7"},{"fixed":"9d360fb820a3b9576d155e720ec44fef54d2efb5"},{"fixed":"db20589d7b248211f63f4a7f642a49c0832b13ae"},{"fixed":"7746d72c64054976887928d64d2caf25c5a6dcc0"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80592.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.16.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80592.json"}}],"schema_version":"1.9.0"}