CVE-2022-49784

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49784
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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/bdfe34597139cfcecd47a2eb97fea44d77157491 Patch
https://git.kernel.org/stable/c/f75be9885d49e3717de962345c4572ddab52b178 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*
History

07 Nov 2025, 17:49

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux
Linux linux Kernel
Summary
  • (es) 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: [&lt;000000000759fb79&gt;] amd_uncore_cpu_up_prepare+0xaf/0x230 [&lt;00000000ddc9e126&gt;] cpuhp_invoke_callback+0x2cf/0x470 [&lt;0000000093e727d4&gt;] cpuhp_issue_call+0x14d/0x170 [&lt;0000000045464d54&gt;] __cpuhp_setup_state_cpuslocked+0x11e/0x330 [&lt;0000000069f67cbd&gt;] __cpuhp_setup_state+0x6b/0x110 [&lt;0000000015365e0f&gt;] amd_uncore_init+0x260/0x321 [&lt;00000000089152d2&gt;] do_one_initcall+0x3f/0x1f0 [&lt;000000002d0bd18d&gt;] kernel_init_freeable+0x1ca/0x212 [&lt;0000000030be8dde&gt;] kernel_init+0x11/0x120 [&lt;0000000059709e59&gt;] 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: [&lt;00000000306efe8b&gt;] preparación de CPU activada de AMD sin núcleo + 0x183/0x230 [&lt;00000000ddc9e126&gt;] devolución de llamada de invocación de CPUHp + 0x2cf/0x470 [&lt;0000000093e727d4&gt;] llamada de emisión de CPUHp + 0x14d/0x170 [&lt;0000000045464d54&gt;] estado de configuración de CPUHp bloqueado + 0x11e/0x330 [&lt;0000000069f67cbd&gt;] __cpuhp_setup_state+0x6b/0x110 [&lt;0000000015365e0f&gt;] amd_uncore_init+0x260/0x321 [&lt;00000000089152d2&gt;] do_one_initcall+0x3f/0x1f0 [&lt;000000002d0bd18d&gt;] kernel_init_freeable+0x1ca/0x212 [&lt;0000000030be8dde&gt;] kernel_init+0x11/0x120 [&lt;0000000059709e59&gt;] ret_from_fork+0x22/0x30 [...] Solucione el problema liberando la matriz de eventos antes de liberar el contexto uncore.
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*
CWE CWE-401
References () https://git.kernel.org/stable/c/bdfe34597139cfcecd47a2eb97fea44d77157491 - () https://git.kernel.org/stable/c/bdfe34597139cfcecd47a2eb97fea44d77157491 - Patch
References () https://git.kernel.org/stable/c/f75be9885d49e3717de962345c4572ddab52b178 - () https://git.kernel.org/stable/c/f75be9885d49e3717de962345c4572ddab52b178 - Patch

01 May 2025, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-01 15:16

Updated : 2025-11-07 17:49

NVD link : CVE-2022-49784

Mitre link : CVE-2022-49784

CVE.ORG link : CVE-2022-49784

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime