CVE-2022-49592

Estado: AnalizadaAlta (7.8)—

In the Linux kernel, the following vulnerability has been resolved:

net: stmmac: fix dma queue left shift overflow issue

When queue number is > 4, left shift overflows due to 32 bits integer variable. Mask calculation is wrong for MTL_RXQ_DMA_MAP1.

This change fixes MTL_RXQ_DMA_MAP1 mask issue and channel/queue mapping warning.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=216195

Detalles técnicos trazas, registros y código del informe original

If CONFIG_UBSAN is enabled, kernel dumps below warning:
[   10.363842] ==================================================================
[   10.363882] UBSAN: shift-out-of-bounds in /build/linux-intel-iotg-5.15-8e6Tf4/
linux-intel-iotg-5.15-5.15.0/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c:224:12
[   10.363929] shift exponent 40 is too large for 32-bit type 'unsigned int'
[   10.363953] CPU: 1 PID: 599 Comm: NetworkManager Not tainted 5.15.0-1003-intel-iotg
[   10.363956] Hardware name: ADLINK Technology Inc. LEC-EL/LEC-EL, BIOS 0.15.11 12/22/2021
[   10.363958] Call Trace:
[   10.363960]  <TASK>
[   10.363963]  dump_stack_lvl+0x4a/0x5f
[   10.363971]  dump_stack+0x10/0x12
[   10.363974]  ubsan_epilogue+0x9/0x45
[   10.363976]  __ubsan_handle_shift_out_of_bounds.cold+0x61/0x10e
[   10.363979]  ? wake_up_klogd+0x4a/0x50
[   10.363983]  ? vprintk_emit+0x8f/0x240
[   10.363986]  dwmac4_map_mtl_dma.cold+0x42/0x91 [stmmac]
[   10.364001]  stmmac_mtl_configuration+0x1ce/0x7a0 [stmmac]
[   10.364009]  ? dwmac410_dma_init_channel+0x70/0x70 [stmmac]
[   10.364020]  stmmac_hw_setup.cold+0xf/0xb14 [stmmac]
[   10.364030]  ? page_pool_alloc_pages+0x4d/0x70
[   10.364034]  ? stmmac_clear_tx_descriptors+0x6e/0xe0 [stmmac]
[   10.364042]  stmmac_open+0x39e/0x920 [stmmac]
[   10.364050]  __dev_open+0xf0/0x1a0
[   10.364054]  __dev_change_flags+0x188/0x1f0
[   10.364057]  dev_change_flags+0x26/0x60
[   10.364059]  do_setlink+0x908/0xc40
[   10.364062]  ? do_setlink+0xb10/0xc40
[   10.364064]  ? __nla_validate_parse+0x4c/0x1a0
[   10.364068]  __rtnl_newlink+0x597/0xa10
[   10.364072]  ? __nla_reserve+0x41/0x50
[   10.364074]  ? __kmalloc_node_track_caller+0x1d0/0x4d0
[   10.364079]  ? pskb_expand_head+0x75/0x310
[   10.364082]  ? nla_reserve_64bit+0x21/0x40
[   10.364086]  ? skb_free_head+0x65/0x80
[   10.364089]  ? security_sock_rcv_skb+0x2c/0x50
[   10.364094]  ? __cond_resched+0x19/0x30
[   10.364097]  ? kmem_cache_alloc_trace+0x15a/0x420
[   10.364100]  rtnl_newlink+0x49/0x70

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.28%
Percentil entre todas las CVEs puntuadas: 19
Fecha de la puntuación: 5/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation75 %
Impacto principalT1059 Command and Scripting Interpreterexecution60 %

Vulnerabilidad de desbordamiento de enteros (CWE-787) en driver stmmac del kernel Linux con acceso local (AV:L) y privilegios bajos (PR:L) permite escalada de privilegios. El desbordamiento en cálculo de máscara de DMA puede causar corrupción de memoria y ejecución de código.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-787

Referencias

JSON original (NVD)

Mostrar

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  "id": "CVE-2022-49592",
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  "published": "2025-02-26T07:01:34.760",
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        }
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: fix dma queue left shift overflow issue\n\nWhen queue number is > 4, left shift overflows due to 32 bits\ninteger variable. Mask calculation is wrong for MTL_RXQ_DMA_MAP1.\n\nIf CONFIG_UBSAN is enabled, kernel dumps below warning:\n[   10.363842] ==================================================================\n[   10.363882] UBSAN: shift-out-of-bounds in /build/linux-intel-iotg-5.15-8e6Tf4/\nlinux-intel-iotg-5.15-5.15.0/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c:224:12\n[   10.363929] shift exponent 40 is too large for 32-bit type 'unsigned int'\n[   10.363953] CPU: 1 PID: 599 Comm: NetworkManager Not tainted 5.15.0-1003-intel-iotg\n[   10.363956] Hardware name: ADLINK Technology Inc. LEC-EL/LEC-EL, BIOS 0.15.11 12/22/2021\n[   10.363958] Call Trace:\n[   10.363960]  <TASK>\n[   10.363963]  dump_stack_lvl+0x4a/0x5f\n[   10.363971]  dump_stack+0x10/0x12\n[   10.363974]  ubsan_epilogue+0x9/0x45\n[   10.363976]  __ubsan_handle_shift_out_of_bounds.cold+0x61/0x10e\n[   10.363979]  ? wake_up_klogd+0x4a/0x50\n[   10.363983]  ? vprintk_emit+0x8f/0x240\n[   10.363986]  dwmac4_map_mtl_dma.cold+0x42/0x91 [stmmac]\n[   10.364001]  stmmac_mtl_configuration+0x1ce/0x7a0 [stmmac]\n[   10.364009]  ? dwmac410_dma_init_channel+0x70/0x70 [stmmac]\n[   10.364020]  stmmac_hw_setup.cold+0xf/0xb14 [stmmac]\n[   10.364030]  ? page_pool_alloc_pages+0x4d/0x70\n[   10.364034]  ? stmmac_clear_tx_descriptors+0x6e/0xe0 [stmmac]\n[   10.364042]  stmmac_open+0x39e/0x920 [stmmac]\n[   10.364050]  __dev_open+0xf0/0x1a0\n[   10.364054]  __dev_change_flags+0x188/0x1f0\n[   10.364057]  dev_change_flags+0x26/0x60\n[   10.364059]  do_setlink+0x908/0xc40\n[   10.364062]  ? do_setlink+0xb10/0xc40\n[   10.364064]  ? __nla_validate_parse+0x4c/0x1a0\n[   10.364068]  __rtnl_newlink+0x597/0xa10\n[   10.364072]  ? __nla_reserve+0x41/0x50\n[   10.364074]  ? __kmalloc_node_track_caller+0x1d0/0x4d0\n[   10.364079]  ? pskb_expand_head+0x75/0x310\n[   10.364082]  ? nla_reserve_64bit+0x21/0x40\n[   10.364086]  ? skb_free_head+0x65/0x80\n[   10.364089]  ? security_sock_rcv_skb+0x2c/0x50\n[   10.364094]  ? __cond_resched+0x19/0x30\n[   10.364097]  ? kmem_cache_alloc_trace+0x15a/0x420\n[   10.364100]  rtnl_newlink+0x49/0x70\n\nThis change fixes MTL_RXQ_DMA_MAP1 mask issue and channel/queue\nmapping warning.\n\nBugLink: https://bugzilla.kernel.org/show_bug.cgi?id=216195"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: stmmac: soluciona el problema de desbordamiento de desplazamiento a la izquierda de la cola DMA. Cuando el número de cola es &gt; 4, el desplazamiento a la izquierda se desborda debido a una variable entera de 32 bits. El cálculo de la máscara es incorrecto para MTL_RXQ_DMA_MAP1. Si CONFIG_UBSAN está habilitado, el kernel muestra la siguiente advertencia: [ 10.363842] ================================================================== [ 10.363882] UBSAN: shift-out-of-bounds in /build/linux-intel-iotg-5.15-8e6Tf4/ linux-intel-iotg-5.15-5.15.0/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c:224:12 [ 10.363929] shift exponent 40 is too large for 32-bit type 'unsigned int' [ 10.363953] CPU: 1 PID: 599 Comm: NetworkManager Not tainted 5.15.0-1003-intel-iotg [ 10.363956] Hardware name: ADLINK Technology Inc. LEC-EL/LEC-EL, BIOS 0.15.11 12/22/2021 [ 10.363958] Call Trace: [ 10.363960]  [ 10.363963] dump_stack_lvl+0x4a/0x5f [ 10.363971] dump_stack+0x10/0x12 [ 10.363974] ubsan_epilogue+0x9/0x45 [ 10.363976] __ubsan_handle_shift_out_of_bounds.cold+0x61/0x10e [ 10.363979] ? wake_up_klogd+0x4a/0x50 [ 10.363983] ? vprintk_emit+0x8f/0x240 [ 10.363986] dwmac4_map_mtl_dma.cold+0x42/0x91 [stmmac] [ 10.364001] stmmac_mtl_configuration+0x1ce/0x7a0 [stmmac] [ 10.364009] ? dwmac410_dma_init_channel+0x70/0x70 [stmmac] [ 10.364020] stmmac_hw_setup.cold+0xf/0xb14 [stmmac] [ 10.364030] ? page_pool_alloc_pages+0x4d/0x70 [ 10.364034] ? stmmac_clear_tx_descriptors+0x6e/0xe0 [stmmac] [ 10.364042] stmmac_open+0x39e/0x920 [stmmac] [ 10.364050] __dev_open+0xf0/0x1a0 [ 10.364054] __dev_change_flags+0x188/0x1f0 [ 10.364057] dev_change_flags+0x26/0x60 [ 10.364059] do_setlink+0x908/0xc40 [ 10.364062] ? do_setlink+0xb10/0xc40 [ 10.364064] ? __nla_validate_parse+0x4c/0x1a0 [ 10.364068] __rtnl_newlink+0x597/0xa10 [ 10.364072] ? __nla_reserve+0x41/0x50 [ 10.364074] ? __kmalloc_node_track_caller+0x1d0/0x4d0 [ 10.364079] ? pskb_expand_head+0x75/0x310 [ 10.364082] ? nla_reserve_64bit+0x21/0x40 [ 10.364086] ? skb_free_head+0x65/0x80 [ 10.364089] ? security_sock_rcv_skb+0x2c/0x50 [ 10.364094] ? __cond_resched+0x19/0x30 [ 10.364097] ? kmem_cache_alloc_trace+0x15a/0x420 [ 10.364100] rtnl_newlink+0x49/0x70 This change fixes MTL_RXQ_DMA_MAP1 mask issue and channel/queue mapping warning. BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=216195 "
    }
  ],
  "lastModified": "2026-06-17T05:18:33.747",
  "configurations": [
    {
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}