{"cve":"CVE-2023-52560","nvd":{"published":"2024-03-02T22:15:48.750","modified":"2026-06-17T06:43:01.610","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/vaddr-test: fix memory leak in damon_do_test_apply_three_regions()\n\nWhen CONFIG_DAMON_VADDR_KUNIT_TEST=y and making CONFIG_DEBUG_KMEMLEAK=y\nand CONFIG_DEBUG_KMEMLEAK_AUTO_SCAN=y, the below memory leak is detected.\n\nSince commit 9f86d624292c (\"mm/damon/vaddr-test: remove unnecessary\nvariables\"), the damon_destroy_ctx() is removed, but still call\ndamon_new_target() and damon_new_region(), the damon_region which is\nallocated by kmem_cache_alloc() in damon_new_region() and the damon_target\nwhich is allocated by kmalloc in damon_new_target() are not freed.  And\nthe damon_region which is allocated in damon_new_region() in\ndamon_set_regions() is also not freed.\n\nSo use damon_destroy_target to free all the damon_regions and damon_target.\n\n    unreferenced object 0xffff888107c9a940 (size 64):\n      comm \"kunit_try_catch\", pid 1069, jiffies 4294670592 (age 732.761s)\n      hex dump (first 32 bytes):\n        00 00 00 00 00 00 00 00 06 00 00 00 6b 6b 6b 6b  ............kkkk\n        60 c7 9c 07 81 88 ff ff f8 cb 9c 07 81 88 ff ff  `...............\n      backtrace:\n        [<ffffffff817e0167>] kmalloc_trace+0x27/0xa0\n        [<ffffffff819c11cf>] damon_new_target+0x3f/0x1b0\n        [<ffffffff819c7d55>] damon_do_test_apply_three_regions.constprop.0+0x95/0x3e0\n        [<ffffffff819c82be>] damon_test_apply_three_regions1+0x21e/0x260\n        [<ffffffff829fce6a>] kunit_generic_run_threadfn_adapter+0x4a/0x90\n        [<ffffffff81237cf6>] kthread+0x2b6/0x380\n        [<ffffffff81097add>] ret_from_fork+0x2d/0x70\n        [<ffffffff81003791>] ret_from_fork_asm+0x11/0x20\n    unreferenced object 0xffff8881079cc740 (size 56):\n      comm \"kunit_try_catch\", pid 1069, jiffies 4294670592 (age 732.761s)\n      hex dump (first 32 bytes):\n        05 00 00 00 00 00 00 00 14 00 00 00 00 00 00 00  ................\n        6b 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 6b 6b 6b 6b  kkkkkkkk....kkkk\n      backtrace:\n        [<ffffffff819bc492>] damon_new_region+0x22/0x1c0\n        [<ffffffff819c7d91>] damon_do_test_apply_three_regions.constprop.0+0xd1/0x3e0\n        [<ffffffff819c82be>] damon_test_apply_three_regions1+0x21e/0x260\n        [<ffffffff829fce6a>] kunit_generic_run_threadfn_adapter+0x4a/0x90\n        [<ffffffff81237cf6>] kthread+0x2b6/0x380\n        [<ffffffff81097add>] ret_from_fork+0x2d/0x70\n        [<ffffffff81003791>] ret_from_fork_asm+0x11/0x20\n    unreferenced object 0xffff888107c9ac40 (size 64):\n      comm \"kunit_try_catch\", pid 1071, jiffies 4294670595 (age 732.843s)\n      hex dump (first 32 bytes):\n        00 00 00 00 00 00 00 00 06 00 00 00 6b 6b 6b 6b  ............kkkk\n        a0 cc 9c 07 81 88 ff ff 78 a1 76 07 81 88 ff ff  ........x.v.....\n      backtrace:\n        [<ffffffff817e0167>] kmalloc_trace+0x27/0xa0\n        [<ffffffff819c11cf>] damon_new_target+0x3f/0x1b0\n        [<ffffffff819c7d55>] damon_do_test_apply_three_regions.constprop.0+0x95/0x3e0\n        [<ffffffff819c851e>] damon_test_apply_three_regions2+0x21e/0x260\n        [<ffffffff829fce6a>] kunit_generic_run_threadfn_adapter+0x4a/0x90\n        [<ffffffff81237cf6>] kthread+0x2b6/0x380\n        [<ffffffff81097add>] ret_from_fork+0x2d/0x70\n        [<ffffffff81003791>] ret_from_fork_asm+0x11/0x20\n    unreferenced object 0xffff8881079ccc80 (size 56):\n      comm \"kunit_try_catch\", pid 1071, jiffies 4294670595 (age 732.843s)\n      hex dump (first 32 bytes):\n        05 00 00 00 00 00 00 00 14 00 00 00 00 00 00 00  ................\n        6b 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 6b 6b 6b 6b  kkkkkkkk....kkkk\n      backtrace:\n        [<ffffffff819bc492>] damon_new_region+0x22/0x1c0\n        [<ffffffff819c7d91>] damon_do_test_apply_three_regions.constprop.0+0xd1/0x3e0\n        [<ffffffff819c851e>] damon_test_apply_three_regions2+0x21e/0x260\n        [<ffffffff829fce6a>] kunit_generic_run_threadfn_adapter+0x4a/0x90\n        [<ffffffff81237cf6>] kthread+0x2b6/0x380\n        [<ffffffff81097add>] ret_from_fork+0x2d/0x70\n        [<ffff\n---truncated---","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-401"],"references":["https://git.kernel.org/stable/c/45120b15743fa7c0aa53d5db6dfb4c8f87be4abd","https://git.kernel.org/stable/c/6b522001693aa113d97a985abc5f6932972e8e86","https://git.kernel.org/stable/c/9a4fe81a8644b717d57d81ce5849e16583b13fe8","https://git.kernel.org/stable/c/45120b15743fa7c0aa53d5db6dfb4c8f87be4abd","https://git.kernel.org/stable/c/6b522001693aa113d97a985abc5f6932972e8e86"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:46:54.846886191+00:00"},"epss":{"cve":"CVE-2023-52560","score":0.00253,"percentile":0.16846,"date":"2026-11-01"},"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."]}