{"schema_version":"1.9.0","id":"CVE-2022-49784","published":"2025-05-01T14:09:17.695Z","modified":"2026-08-12T03:51:21.474614003Z","related":["SUSE-SU-2025:01966-1","SUSE-SU-2025:02173-1"],"summary":"perf/x86/amd/uncore: Fix memory leak for events array","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/amd/uncore: Fix memory leak for events array\n\nWhen a CPU comes online, the per-CPU NB and LLC uncore contexts are\nfreed but not the events array within the context structure. This\ncauses a memory leak as identified by the kmemleak detector.\n\n  [...]\n  unreferenced object 0xffff8c5944b8e320 (size 32):\n    comm \"swapper/0\", pid 1, jiffies 4294670387 (age 151.072s)\n    hex dump (first 32 bytes):\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [<000000000759fb79>] amd_uncore_cpu_up_prepare+0xaf/0x230\n      [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470\n      [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170\n      [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330\n      [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110\n      [<0000000015365e0f>] amd_uncore_init+0x260/0x321\n      [<00000000089152d2>] do_one_initcall+0x3f/0x1f0\n      [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212\n      [<0000000030be8dde>] kernel_init+0x11/0x120\n      [<0000000059709e59>] ret_from_fork+0x22/0x30\n  unreferenced object 0xffff8c5944b8dd40 (size 64):\n    comm \"swapper/0\", pid 1, jiffies 4294670387 (age 151.072s)\n    hex dump (first 32 bytes):\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [<00000000306efe8b>] amd_uncore_cpu_up_prepare+0x183/0x230\n      [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470\n      [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170\n      [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330\n      [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110\n      [<0000000015365e0f>] amd_uncore_init+0x260/0x321\n      [<00000000089152d2>] do_one_initcall+0x3f/0x1f0\n      [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212\n      [<0000000030be8dde>] kernel_init+0x11/0x120\n      [<0000000059709e59>] ret_from_fork+0x22/0x30\n  [...]\n\nFix the problem by freeing the events array before freeing the uncore\ncontext.","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"39621c5808f5dda75d03dc4b2d4d2b13a5a1c34b"},{"fixed":"f75be9885d49e3717de962345c4572ddab52b178"},{"fixed":"bdfe34597139cfcecd47a2eb97fea44d77157491"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49784.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.0.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49784.json"}}],"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/bdfe34597139cfcecd47a2eb97fea44d77157491"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f75be9885d49e3717de962345c4572ddab52b178"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49784.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49784"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49784.json"}}