{"id":"CVE-2026-80592","state":"PUBLISHED","title":"samples/damon/mtier: fail early if address range parameters are invalid","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.","publishedAt":"2026-08-28T06:48:20.218Z","updatedAt":"2026-08-28T06:48:20.218Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"82a08bde3cf7bbbe90de57baa181bebf676582c7","status":"affected","lessThan":"9d360fb820a3b9576d155e720ec44fef54d2efb5","versionType":"git"},{"version":"82a08bde3cf7bbbe90de57baa181bebf676582c7","status":"affected","lessThan":"db20589d7b248211f63f4a7f642a49c0832b13ae","versionType":"git"},{"version":"82a08bde3cf7bbbe90de57baa181bebf676582c7","status":"affected","lessThan":"7746d72c64054976887928d64d2caf25c5a6dcc0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["samples/damon/mtier.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["samples/damon/mtier.c"]}],"references":["https://git.kernel.org/stable/c/9d360fb820a3b9576d155e720ec44fef54d2efb5","https://git.kernel.org/stable/c/db20589d7b248211f63f4a7f642a49c0832b13ae","https://git.kernel.org/stable/c/7746d72c64054976887928d64d2caf25c5a6dcc0"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80592.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80592","state":"PUBLISHED","datePublished":"2026-08-28T06:48:20.218Z","dateUpdated":"2026-08-28T06:48:20.218Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.770Z"},"containers":{"cna":{"title":"samples/damon/mtier: fail early if address range parameters are invalid","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"82a08bde3cf7bbbe90de57baa181bebf676582c7","status":"affected","lessThan":"9d360fb820a3b9576d155e720ec44fef54d2efb5","versionType":"git"},{"version":"82a08bde3cf7bbbe90de57baa181bebf676582c7","status":"affected","lessThan":"db20589d7b248211f63f4a7f642a49c0832b13ae","versionType":"git"},{"version":"82a08bde3cf7bbbe90de57baa181bebf676582c7","status":"affected","lessThan":"7746d72c64054976887928d64d2caf25c5a6dcc0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["samples/damon/mtier.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["samples/damon/mtier.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9d360fb820a3b9576d155e720ec44fef54d2efb5"},{"url":"https://git.kernel.org/stable/c/db20589d7b248211f63f4a7f642a49c0832b13ae"},{"url":"https://git.kernel.org/stable/c/7746d72c64054976887928d64d2caf25c5a6dcc0"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-28T06:48:20.218Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}