CVE-2022-49784
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: perf/x86/amd/uncore: Fix memory leak for events array When a CPU comes online, the per-CPU NB and LLC uncore contexts are freed but not the events array within the context structure. This causes a memory leak as identified by the kmemleak detector. [...] unreferenced object 0xffff8c5944b8e320 (size 32): comm "swapper/0", pid 1, jiffies 4294670387 (age 151.072s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000000759fb79>] amd_uncore_cpu_up_prepare+0xaf/0x230 [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470 [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170 [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330 [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110 [<0000000015365e0f>] amd_uncore_init+0x260/0x321 [<00000000089152d2>] do_one_initcall+0x3f/0x1f0 [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212 [<0000000030be8dde>] kernel_init+0x11/0x120 [<0000000059709e59>] ret_from_fork+0x22/0x30 unreferenced object 0xffff8c5944b8dd40 (size 64): comm "swapper/0", pid 1, jiffies 4294670387 (age 151.072s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000306efe8b>] amd_uncore_cpu_up_prepare+0x183/0x230 [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470 [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170 [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330 [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110 [<0000000015365e0f>] amd_uncore_init+0x260/0x321 [<00000000089152d2>] do_one_initcall+0x3f/0x1f0 [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212 [<0000000030be8dde>] kernel_init+0x11/0x120 [<0000000059709e59>] ret_from_fork+0x22/0x30 [...] Fix the problem by freeing the events array before freeing the uncore context.
View original CVE JSON
{
"id": "CVE-2022-49784",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-05-01T15:16:01.610",
"lastModified": "2026-11-05T20:17:11.300",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: perf/x86/amd/uncore: Se corrige una fuga de memoria en la matriz de eventos. Cuando una CPU se conecta, se liberan los contextos de núcleo único (NB) y LLC por CPU, pero no la matriz de eventos dentro de la estructura del contexto. Esto provoca una fuga de memoria, identificada por el detector kmemleak. [...] objeto sin referencia 0xffff8c5944b8e320 (tamaño 32): comm \"swapper/0\", pid 1, jiffies 4294670387 (edad 151.072s) volcado hexadecimal (primeros 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000000759fb79>] amd_uncore_cpu_up_prepare+0xaf/0x230 [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470 [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170 [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330 [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110 [<0000000015365e0f>] amd_uncore_init+0x260/0x321 [<00000000089152d2>] do_one_initcall+0x3f/0x1f0 [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212 [<0000000030be8dde>] kernel_init+0x11/0x120 [<0000000059709e59>] ret_from_fork+0x22/0x30 objeto sin referencia 0xffff8c5944b8dd40 (tamaño 64): comm \"swapper/0\", pid 1, jiffies 4294670387 (edad 151.072s) volcado hexadecimal (primeros 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ seguimiento inverso: [<00000000306efe8b>] preparación de CPU activada de AMD sin núcleo + 0x183/0x230 [<00000000ddc9e126>] devolución de llamada de invocación de CPUHp + 0x2cf/0x470 [<0000000093e727d4>] llamada de emisión de CPUHp + 0x14d/0x170 [<0000000045464d54>] estado de configuración de CPUHp bloqueado + 0x11e/0x330 [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110 [<0000000015365e0f>] amd_uncore_init+0x260/0x321 [<00000000089152d2>] do_one_initcall+0x3f/0x1f0 [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212 [<0000000030be8dde>] kernel_init+0x11/0x120 [<0000000059709e59>] ret_from_fork+0x22/0x30 [...] Solucione el problema liberando la matriz de eventos antes de liberar el contexto uncore."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"arch/x86/events/amd/uncore.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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{
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"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
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},
{
"version": "0",
"lessThan": "6.0",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.0.10",
"lessThanOrEqual": "6.0.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
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}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-05T19:47:52.651595Z",
"id": "CVE-2022-49784",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-401"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"references": [
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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}