// For flags

CVE-2024-38664

drm: zynqmp_dpsub: Always register bridge

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

In the Linux kernel, the following vulnerability has been resolved: drm: zynqmp_dpsub: Always register bridge We must always register the DRM bridge, since zynqmp_dp_hpd_work_func
calls drm_bridge_hpd_notify, which in turn expects hpd_mutex to be
initialized. We do this before zynqmp_dpsub_drm_init since that calls
drm_bridge_attach. This fixes the following lockdep warning: [ 19.217084] ------------[ cut here ]------------
[ 19.227530] DEBUG_LOCKS_WARN_ON(lock->magic != lock)
[ 19.227768] WARNING: CPU: 0 PID: 140 at kernel/locking/mutex.c:582 __mutex_lock+0x4bc/0x550
[ 19.241696] Modules linked in:
[ 19.244937] CPU: 0 PID: 140 Comm: kworker/0:4 Not tainted 6.6.20+ #96
[ 19.252046] Hardware name: xlnx,zynqmp (DT)
[ 19.256421] Workqueue: events zynqmp_dp_hpd_work_func
[ 19.261795] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 19.269104] pc : __mutex_lock+0x4bc/0x550
[ 19.273364] lr : __mutex_lock+0x4bc/0x550
[ 19.277592] sp : ffffffc085c5bbe0
[ 19.281066] x29: ffffffc085c5bbe0 x28: 0000000000000000 x27: ffffff88009417f8
[ 19.288624] x26: ffffff8800941788 x25: ffffff8800020008 x24: ffffffc082aa3000
[ 19.296227] x23: ffffffc080d90e3c x22: 0000000000000002 x21: 0000000000000000
[ 19.303744] x20: 0000000000000000 x19: ffffff88002f5210 x18: 0000000000000000
[ 19.311295] x17: 6c707369642e3030 x16: 3030613464662072 x15: 0720072007200720
[ 19.318922] x14: 0000000000000000 x13: 284e4f5f4e524157 x12: 0000000000000001
[ 19.326442] x11: 0001ffc085c5b940 x10: 0001ff88003f388b x9 : 0001ff88003f3888
[ 19.334003] x8 : 0001ff88003f3888 x7 : 0000000000000000 x6 : 0000000000000000
[ 19.341537] x5 : 0000000000000000 x4 : 0000000000001668 x3 : 0000000000000000
[ 19.349054] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffffff88003f3880
[ 19.356581] Call trace:
[ 19.359160] __mutex_lock+0x4bc/0x550
[ 19.363032] mutex_lock_nested+0x24/0x30
[ 19.367187] drm_bridge_hpd_notify+0x2c/0x6c
[ 19.371698] zynqmp_dp_hpd_work_func+0x44/0x54
[ 19.376364] process_one_work+0x3ac/0x988
[ 19.380660] worker_thread+0x398/0x694
[ 19.384736] kthread+0x1bc/0x1c0
[ 19.388241] ret_from_fork+0x10/0x20
[ 19.392031] irq event stamp: 183
[ 19.395450] hardirqs last enabled at (183): [<ffffffc0800b9278>] finish_task_switch.isra.0+0xa8/0x2d4
[ 19.405140] hardirqs last disabled at (182): [<ffffffc081ad3754>] __schedule+0x714/0xd04
[ 19.413612] softirqs last enabled at (114): [<ffffffc080133de8>] srcu_invoke_callbacks+0x158/0x23c
[ 19.423128] softirqs last disabled at (110): [<ffffffc080133de8>] srcu_invoke_callbacks+0x158/0x23c
[ 19.432614] ---[ end trace 0000000000000000 ]--- (cherry picked from commit 61ba791c4a7a09a370c45b70a81b8c7d4cf6b2ae)

En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: drm: zynqmp_dpsub: Registrar siempre puente Siempre debemos registrar el puente DRM, ya que zynqmp_dp_hpd_work_func llama a drm_bridge_hpd_notify, que a su vez espera que hpd_mutex se inicialice. Hacemos esto antes de zynqmp_dpsub_drm_init ya que llama a drm_bridge_attach. Esto corrige la siguiente advertencia de bloqueo: [19.217084] ------------[ cortar aquí ]------------ [ 19.227530] DEBUG_LOCKS_WARN_ON(lock-&gt;magic != lock ) [ 19.227768] ADVERTENCIA: CPU: 0 PID: 140 en kernel/locking/mutex.c:582 __mutex_lock+0x4bc/0x550 [ 19.241696] Módulos vinculados en: [ 19.244937] CPU: 0 PID: 140 Comm: kworker/0:4 No contaminado 6.6.20+ #96 [19.252046] Nombre de hardware: xlnx,zynqmp (DT) [19.256421] Cola de trabajo: eventos zynqmp_dp_hpd_work_func [19.261795] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS PE=-- ) [ 19.269104] pc : __mutex_lock+0x4bc/0x550 [ 19.273364] lr : __mutex_lock+0x4bc/0x550 [ 19.277592] sp : ffffffc085c5bbe0 [ 19.281066] x29: ffffffc085c5bbe0 8: 0000000000000000 x27: ffffff88009417f8 [ 19.288624] x26: ffffff8800941788 x25: ffffff8800020008 x24: ffffffc082aa3000 [ 19.296227] x23: ffffffc080d90e3c x22: 0000000000000002 x21: 00000000000000000 [ 19.303744] x20: 0000000000000000 x19: ffffff88002f5210 x18: 0000000000000000 [ 19.311295] x17: 6c707369642e3030 x16: 3030613464662072 x15: 0720072007200720 [ 19.318922] 4: 0000000000000000 x13: 284e4f5f4e524157 x12: 0000000000000001 [ 19.326442] x11: 0001ffc085c5b940 x10: 0001ff88003f388b x9: 0001ff88003f3888 [19.334003] x8: 0001ff88003f3888 x7: 0000000000000000 x6 : 0000000000000000 [ 19.341537] x5 : 0000000000000000 x4 : 0000000000001668 x3 : 0000000000000000 [ 19.349054] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffffff88003f3880 [ 19.356581] Seguimiento de llamadas: [ 19.359160] __mutex_lock+0x4bc/0x550 [ 19.363032] mutex_lock_nested+0x24/0x30 [ 19.367187] drm_bridge_hpd_notify+0x2c/0x6c [ zynqmp_dp_hpd_work_func +0x44/0x54 [ 19.376364] proceso_un_trabajo+0x3ac/0x988 [ 19.380660] hilo_trabajador+0x398/ 0x694 [19.384736] kthread+0x1bc/0x1c0 [19.388241] ret_from_fork+0x10/0x20 [19.392031] sello de evento irq: 183 [19.395450] hardirqs habilitado por última vez en (183): [] terminar_task_switch.isra.0+0xa8/0x2d4 [ 19.405140] hardirqs deshabilitado por última vez en (182): [] __schedule+0x714/0xd04 [ 19.413612] softirqs habilitado por última vez en (114): [] srcu_invoke_callbacks+0x158/0x23c 19.423128] softirqs se deshabilitó por última vez en ( 110): [] srcu_invoke_callbacks+0x158/0x23c [ 19.432614] ---[ end trace 0000000000000000 ]--- (seleccionado de el commit 61ba791c4a7a09a370c45b70a81b8c7d4 cf6b2ae)

In the Linux kernel, the following vulnerability has been resolved: drm: zynqmp_dpsub: Always register bridge We must always register the DRM bridge, since zynqmp_dp_hpd_work_func calls drm_bridge_hpd_notify, which in turn expects hpd_mutex to be initialized. We do this before zynqmp_dpsub_drm_init since that calls drm_bridge_attach. This fixes the following lockdep warning: [ 19.217084] ------------[ cut here ]------------ [ 19.227530] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 19.227768] WARNING: CPU: 0 PID: 140 at kernel/locking/mutex.c:582 __mutex_lock+0x4bc/0x550 [ 19.241696] Modules linked in: [ 19.244937] CPU: 0 PID: 140 Comm: kworker/0:4 Not tainted 6.6.20+ #96 [ 19.252046] Hardware name: xlnx,zynqmp (DT) [ 19.256421] Workqueue: events zynqmp_dp_hpd_work_func [ 19.261795] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 19.269104] pc : __mutex_lock+0x4bc/0x550 [ 19.273364] lr : __mutex_lock+0x4bc/0x550 [ 19.277592] sp : ffffffc085c5bbe0 [ 19.281066] x29: ffffffc085c5bbe0 x28: 0000000000000000 x27: ffffff88009417f8 [ 19.288624] x26: ffffff8800941788 x25: ffffff8800020008 x24: ffffffc082aa3000 [ 19.296227] x23: ffffffc080d90e3c x22: 0000000000000002 x21: 0000000000000000 [ 19.303744] x20: 0000000000000000 x19: ffffff88002f5210 x18: 0000000000000000 [ 19.311295] x17: 6c707369642e3030 x16: 3030613464662072 x15: 0720072007200720 [ 19.318922] x14: 0000000000000000 x13: 284e4f5f4e524157 x12: 0000000000000001 [ 19.326442] x11: 0001ffc085c5b940 x10: 0001ff88003f388b x9 : 0001ff88003f3888 [ 19.334003] x8 : 0001ff88003f3888 x7 : 0000000000000000 x6 : 0000000000000000 [ 19.341537] x5 : 0000000000000000 x4 : 0000000000001668 x3 : 0000000000000000 [ 19.349054] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffffff88003f3880 [ 19.356581] Call trace: [ 19.359160] __mutex_lock+0x4bc/0x550 [ 19.363032] mutex_lock_nested+0x24/0x30 [ 19.367187] drm_bridge_hpd_notify+0x2c/0x6c [ 19.371698] zynqmp_dp_hpd_work_func+0x44/0x54 [ 19.376364] process_one_work+0x3ac/0x988 [ 19.380660] worker_thread+0x398/0x694 [ 19.384736] kthread+0x1bc/0x1c0 [ 19.388241] ret_from_fork+0x10/0x20 [ 19.392031] irq event stamp: 183 [ 19.395450] hardirqs last enabled at (183): [<ffffffc0800b9278>] finish_task_switch.isra.0+0xa8/0x2d4 [ 19.405140] hardirqs last disabled at (182): [<ffffffc081ad3754>] __schedule+0x714/0xd04 [ 19.413612] softirqs last enabled at (114): [<ffffffc080133de8>] srcu_invoke_callbacks+0x158/0x23c [ 19.423128] softirqs last disabled at (110): [<ffffffc080133de8>] srcu_invoke_callbacks+0x158/0x23c [ 19.432614] ---[ end trace 0000000000000000 ]--- (cherry picked from commit 61ba791c4a7a09a370c45b70a81b8c7d4cf6b2ae)

Chenyuan Yang discovered that the CEC driver driver in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the JFS file system contained an out-of-bounds read vulnerability when printing xattr debug information. A local attacker could use this to cause a denial of service.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
Single
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-06-21 CVE Reserved
  • 2024-06-24 CVE Published
  • 2025-04-20 EPSS Updated
  • 2025-05-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-667: Improper Locking
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 6.2 < 6.6.33
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.2 < 6.6.33"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 6.2 < 6.9.4
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.2 < 6.9.4"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 6.2 < 6.10
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.2 < 6.10"
en
Affected