{"id":"CVE-2022-49784","title":"perf/x86/amd/uncore: Fix memory leak for events array","summary":"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 con…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 39621c5808f5dda75d03dc4b2d4d2b13a5a1c34b < f75be9885d49e3717de962345c4572ddab52b178","Linux >= 39621c5808f5dda75d03dc4b2d4d2b13a5a1c34b < bdfe34597139cfcecd47a2eb97fea44d77157491","Linux 6.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:47:52.651595Z"},"published":"2025-05-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T19:49:48.402Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49784","references":[{"url":"https://git.kernel.org/stable/c/f75be9885d49e3717de962345c4572ddab52b178"},{"url":"https://git.kernel.org/stable/c/bdfe34597139cfcecd47a2eb97fea44d77157491"}],"tags":["cve.org"],"epss":0.0017,"epssPercentile":0.06464,"ingestedAt":"2026-11-05T22:38:31.592Z","slug":"CVE-2022-49784","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 39621c5808f5dda75d03dc4b2d4d2b13a5a1c34b < f75be9885d49e3717de962345c4572ddab52b178`\n- `Linux >= 39621c5808f5dda75d03dc4b2d4d2b13a5a1c34b < bdfe34597139cfcecd47a2eb97fea44d77157491`\n- `Linux 6.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}