{"cve":"CVE-2026-80592","nvd":{"published":"2026-08-28T08:16:42.830","modified":"2026-08-28T08:16:42.830","status":"Received","description":"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 >= 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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/7746d72c64054976887928d64d2caf25c5a6dcc0","https://git.kernel.org/stable/c/9d360fb820a3b9576d155e720ec44fef54d2efb5","https://git.kernel.org/stable/c/db20589d7b248211f63f4a7f642a49c0832b13ae"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-80592","score":0.00206,"percentile":0.10718,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}