CVE-2022-50173
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
drm/msm/mdp5: Fix global state lock backoff
We need to grab the lock after the early return for !hwpipe case. Otherwise, we could have hit contention yet still returned 0.
Fixes an issue that the new CONFIG_DRM_DEBUG_MODESET_LOCK stuff flagged in CI:
Patchwork: https://patchwork.freedesktop.org/patch/492701/
Detalles técnicos trazas, registros y código del informe original
WARNING: CPU: 0 PID: 282 at drivers/gpu/drm/drm_modeset_lock.c:296 drm_modeset_lock+0xf8/0x154
Modules linked in:
CPU: 0 PID: 282 Comm: kms_cursor_lega Tainted: G W 5.19.0-rc2-15930-g875cc8bc536a #1
Hardware name: Qualcomm Technologies, Inc. DB820c (DT)
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : drm_modeset_lock+0xf8/0x154
lr : drm_atomic_get_private_obj_state+0x84/0x170
sp : ffff80000cfab6a0
x29: ffff80000cfab6a0 x28: 0000000000000000 x27: ffff000083bc4d00
x26: 0000000000000038 x25: 0000000000000000 x24: ffff80000957ca58
x23: 0000000000000000 x22: ffff000081ace080 x21: 0000000000000001
x20: ffff000081acec18 x19: ffff80000cfabb80 x18: 0000000000000038
x17: 0000000000000000 x16: 0000000000000000 x15: fffffffffffea0d0
x14: 0000000000000000 x13: 284e4f5f4e524157 x12: 5f534b434f4c5f47
x11: ffff80000a386aa8 x10: 0000000000000029 x9 : ffff80000cfab610
x8 : 0000000000000029 x7 : 0000000000000014 x6 : 0000000000000000
x5 : 0000000000000001 x4 : ffff8000081ad904 x3 : 0000000000000029
x2 : ffff0000801db4c0 x1 : ffff80000cfabb80 x0 : ffff000081aceb58
Call trace:
drm_modeset_lock+0xf8/0x154
drm_atomic_get_private_obj_state+0x84/0x170
mdp5_get_global_state+0x54/0x6c
mdp5_pipe_release+0x2c/0xd4
mdp5_plane_atomic_check+0x2ec/0x414
drm_atomic_helper_check_planes+0xd8/0x210
drm_atomic_helper_check+0x54/0xb0
...
---[ end trace 0000000000000000 ]---
drm_modeset_lock attempting to lock a contended lock without backoff:
drm_modeset_lock+0x148/0x154
mdp5_get_global_state+0x30/0x6c
mdp5_pipe_release+0x2c/0xd4
mdp5_plane_atomic_check+0x290/0x414
drm_atomic_helper_check_planes+0xd8/0x210
drm_atomic_helper_check+0x54/0xb0
drm_atomic_check_only+0x4b0/0x8f4
drm_atomic_commit+0x68/0xe0CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.19%
- Percentil entre todas las CVEs puntuadas: 8
- Fecha de la puntuación: 6/10/2026
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).
Tecnologías afectadas (1)
CWE
- CWE-667
Referencias
- https://git.kernel.org/stable/c/0b07f28c23ff50a7fa5dbc3f6b3b6bd53ac9fc70
- https://git.kernel.org/stable/c/247f2934324f9a18d18df24ea4bfcc7d4631d0ef
- https://git.kernel.org/stable/c/2e34d6c8180a398de6448a93df25068bf3062042
- https://git.kernel.org/stable/c/2fdf5a54ef9376ff69149a48c5616f1141008c9f
- https://git.kernel.org/stable/c/92ef86ab513593c6329d04146e61f9a670e72fc5
- https://git.kernel.org/stable/c/bf386c955f35a0a01bef482b6035d40ff2f6cc75
- https://git.kernel.org/stable/c/f4e3a8c7e890049e7ba2b49ad0315dae841dfa55
JSON original (NVD)
Mostrar
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm/mdp5: Fix global state lock backoff\n\nWe need to grab the lock after the early return for !hwpipe case.\nOtherwise, we could have hit contention yet still returned 0.\n\nFixes an issue that the new CONFIG_DRM_DEBUG_MODESET_LOCK stuff flagged\nin CI:\n\n WARNING: CPU: 0 PID: 282 at drivers/gpu/drm/drm_modeset_lock.c:296 drm_modeset_lock+0xf8/0x154\n Modules linked in:\n CPU: 0 PID: 282 Comm: kms_cursor_lega Tainted: G W 5.19.0-rc2-15930-g875cc8bc536a #1\n Hardware name: Qualcomm Technologies, Inc. DB820c (DT)\n pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : drm_modeset_lock+0xf8/0x154\n lr : drm_atomic_get_private_obj_state+0x84/0x170\n sp : ffff80000cfab6a0\n x29: ffff80000cfab6a0 x28: 0000000000000000 x27: ffff000083bc4d00\n x26: 0000000000000038 x25: 0000000000000000 x24: ffff80000957ca58\n x23: 0000000000000000 x22: ffff000081ace080 x21: 0000000000000001\n x20: ffff000081acec18 x19: ffff80000cfabb80 x18: 0000000000000038\n x17: 0000000000000000 x16: 0000000000000000 x15: fffffffffffea0d0\n x14: 0000000000000000 x13: 284e4f5f4e524157 x12: 5f534b434f4c5f47\n x11: ffff80000a386aa8 x10: 0000000000000029 x9 : ffff80000cfab610\n x8 : 0000000000000029 x7 : 0000000000000014 x6 : 0000000000000000\n x5 : 0000000000000001 x4 : ffff8000081ad904 x3 : 0000000000000029\n x2 : ffff0000801db4c0 x1 : ffff80000cfabb80 x0 : ffff000081aceb58\n Call trace:\n drm_modeset_lock+0xf8/0x154\n drm_atomic_get_private_obj_state+0x84/0x170\n mdp5_get_global_state+0x54/0x6c\n mdp5_pipe_release+0x2c/0xd4\n mdp5_plane_atomic_check+0x2ec/0x414\n drm_atomic_helper_check_planes+0xd8/0x210\n drm_atomic_helper_check+0x54/0xb0\n ...\n ---[ end trace 0000000000000000 ]---\n drm_modeset_lock attempting to lock a contended lock without backoff:\n drm_modeset_lock+0x148/0x154\n mdp5_get_global_state+0x30/0x6c\n mdp5_pipe_release+0x2c/0xd4\n mdp5_plane_atomic_check+0x290/0x414\n drm_atomic_helper_check_planes+0xd8/0x210\n drm_atomic_helper_check+0x54/0xb0\n drm_atomic_check_only+0x4b0/0x8f4\n drm_atomic_commit+0x68/0xe0\n\nPatchwork: https://patchwork.freedesktop.org/patch/492701/"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/msm/mdp5: Se corrige el retroceso del bloqueo del estado global. Necesitamos tomar el bloqueo después del retorno anticipado para el caso de !hwpipe. De lo contrario, podríamos haber llegado a una contención y aún así haber devuelto 0. Corrige un problema que el nuevo material CONFIG_DRM_DEBUG_MODESET_LOCK marcó en CI: ADVERTENCIA: CPU: 0 PID: 282 en drivers/gpu/drm/drm_modeset_lock.c:296 drm_modeset_lock+0xf8/0x154 Módulos vinculados en: CPU: 0 PID: 282 Comm: kms_cursor_lega Tainted: GW 5.19.0-rc2-15930-g875cc8bc536a #1 Nombre del hardware: Qualcomm Technologies, Inc. DB820c (DT) pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : drm_modeset_lock+0xf8/0x154 lr : drm_atomic_get_private_obj_state+0x84/0x170 sp : ffff80000cfab6a0 x29: ffff80000cfab6a0 x28: 0000000000000000 x27: ffff000083bc4d00 x26: 0000000000000038 x25: 0000000000000000 x24: ffff80000957ca58 x23: 0000000000000000 x22: ffff000081ace080 x21: 0000000000000001 x20: ffff000081acec18 x19: ffff80000cfabb80 x18: 0000000000000038 x17: 0000000000000000 x16: 0000000000000000 x15: fffffffffffea0d0 x14: 0000000000000000 x13: 284e4f5f4e524157 x12: 5f534b434f4c5f47 x11: ffff80000a386aa8 x10: 0000000000000029 x9: ffff80000cfab610 x8: 0000000000000029 x7: 00000000000000014 x6 : 0000000000000000 x5 : 0000000000000001 x4 : ffff8000081ad904 x3 : 0000000000000029 x2 : ffff0000801db4c0 x1 : ffff80000cfabb80 x0 : ffff000081aceb58 Rastreo de llamadas: drm_modeset_lock+0xf8/0x154 drm_atomic_get_private_obj_state+0x84/0x170 mdp5_get_global_state+0x54/0x6c mdp5_pipe_release+0x2c/0xd4 mdp5_plane_atomic_check+0x2ec/0x414 drm_atomic_helper_check_planes+0xd8/0x210 drm_atomic_helper_check+0x54/0xb0 ... ---[ fin del seguimiento 0000000000000000 ]--- drm_modeset_lock intenta bloquear un bloqueo disputado sin retroceso: drm_modeset_lock+0x148/0x154 mdp5_get_global_state+0x30/0x6c mdp5_pipe_release+0x2c/0xd4 mdp5_plane_atomic_check+0x290/0x414 drm_atomic_helper_check_planes+0xd8/0x210 drm_atomic_helper_check+0x54/0xb0 drm_atomic_check_only+0x4b0/0x8f4 drm_atomic_commit+0x68/0xe0 Patchwork: https://patchwork.freedesktop.org/patch/492701/"
}
],
"lastModified": "2026-06-17T05:22:54.520",
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