CVE-2025-40225
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/panthor: Fix kernel panic on partial unmap of a GPU VA region This commit address a kernel panic issue that can happen if Userspace tries to partially unmap a GPU virtual region (aka drm_gpuva). The VM_BIND interface allows partial unmapping of a BO. Panthor driver pre-allocates memory for the new drm_gpuva structures that would be needed for the map/unmap operation, done using drm_gpuvm layer. It expected that only one new drm_gpuva would be needed on umap but a partial unmap can require 2 new drm_gpuva and that's why it ended up doing a NULL pointer dereference causing a kernel panic. Following dump was seen when partial unmap was exercised. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000078 Mem abort info: ESR = 0x0000000096000046 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000046, ISS2 = 0x00000000 CM = 0, WnR = 1, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=000000088a863000 [000000000000078] pgd=080000088a842003, p4d=080000088a842003, pud=0800000884bf5003, pmd=0000000000000000 Internal error: Oops: 0000000096000046 [#1] PREEMPT SMP <snip> pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : panthor_gpuva_sm_step_remap+0xe4/0x330 [panthor] lr : panthor_gpuva_sm_step_remap+0x6c/0x330 [panthor] sp : ffff800085d43970 x29: ffff800085d43970 x28: ffff00080363e440 x27: ffff0008090c6000 x26: 0000000000000030 x25: ffff800085d439f8 x24: ffff00080d402000 x23: ffff800085d43b60 x22: ffff800085d439e0 x21: ffff00080abdb180 x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000010 x17: 6e656c202c303030 x16: 3666666666646466 x15: 393d61766f69202c x14: 312d3d7361203a70 x13: 303030323d6e656c x12: ffff80008324bf58 x11: 0000000000000003 x10: 0000000000000002 x9 : ffff8000801a6a9c x8 : ffff00080360b300 x7 : 0000000000000000 x6 : 000000088aa35fc7 x5 : fff1000080000000 x4 : ffff8000842ddd30 x3 : 0000000000000001 x2 : 0000000100000000 x1 : 0000000000000001 x0 : 0000000000000078 Call trace: panthor_gpuva_sm_step_remap+0xe4/0x330 [panthor] op_remap_cb.isra.22+0x50/0x80 __drm_gpuvm_sm_unmap+0x10c/0x1c8 drm_gpuvm_sm_unmap+0x40/0x60 panthor_vm_exec_op+0xb4/0x3d0 [panthor] panthor_vm_bind_exec_sync_op+0x154/0x278 [panthor] panthor_ioctl_vm_bind+0x160/0x4a0 [panthor] drm_ioctl_kernel+0xbc/0x138 drm_ioctl+0x240/0x500 __arm64_sys_ioctl+0xb0/0xf8 invoke_syscall+0x4c/0x110 el0_svc_common.constprop.1+0x98/0xf8 do_el0_svc+0x24/0x38 el0_svc+0x40/0xf8 el0t_64_sync_handler+0xa0/0xc8 el0t_64_sync+0x174/0x178
View original CVE JSON
{
"id": "CVE-2025-40225",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-12-04T16:16:15.043",
"lastModified": "2026-10-19T19:10:00.130",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: Fix kernel panic on partial unmap of a GPU VA region\n\nThis commit address a kernel panic issue that can happen if Userspace\ntries to partially unmap a GPU virtual region (aka drm_gpuva).\nThe VM_BIND interface allows partial unmapping of a BO.\n\nPanthor driver pre-allocates memory for the new drm_gpuva structures\nthat would be needed for the map/unmap operation, done using drm_gpuvm\nlayer. It expected that only one new drm_gpuva would be needed on umap\nbut a partial unmap can require 2 new drm_gpuva and that's why it\nended up doing a NULL pointer dereference causing a kernel panic.\n\nFollowing dump was seen when partial unmap was exercised.\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000078\n Mem abort info:\n ESR = 0x0000000096000046\n EC = 0x25: DABT (current EL), IL = 32 bits\n SET = 0, FnV = 0\n EA = 0, S1PTW = 0\n FSC = 0x06: level 2 translation fault\n Data abort info:\n ISV = 0, ISS = 0x00000046, ISS2 = 0x00000000\n CM = 0, WnR = 1, TnD = 0, TagAccess = 0\n GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n user pgtable: 4k pages, 48-bit VAs, pgdp=000000088a863000\n [000000000000078] pgd=080000088a842003, p4d=080000088a842003, pud=0800000884bf5003, pmd=0000000000000000\n Internal error: Oops: 0000000096000046 [#1] PREEMPT SMP\n <snip>\n pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : panthor_gpuva_sm_step_remap+0xe4/0x330 [panthor]\n lr : panthor_gpuva_sm_step_remap+0x6c/0x330 [panthor]\n sp : ffff800085d43970\n x29: ffff800085d43970 x28: ffff00080363e440 x27: ffff0008090c6000\n x26: 0000000000000030 x25: ffff800085d439f8 x24: ffff00080d402000\n x23: ffff800085d43b60 x22: ffff800085d439e0 x21: ffff00080abdb180\n x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000010\n x17: 6e656c202c303030 x16: 3666666666646466 x15: 393d61766f69202c\n x14: 312d3d7361203a70 x13: 303030323d6e656c x12: ffff80008324bf58\n x11: 0000000000000003 x10: 0000000000000002 x9 : ffff8000801a6a9c\n x8 : ffff00080360b300 x7 : 0000000000000000 x6 : 000000088aa35fc7\n x5 : fff1000080000000 x4 : ffff8000842ddd30 x3 : 0000000000000001\n x2 : 0000000100000000 x1 : 0000000000000001 x0 : 0000000000000078\n Call trace:\n panthor_gpuva_sm_step_remap+0xe4/0x330 [panthor]\n op_remap_cb.isra.22+0x50/0x80\n __drm_gpuvm_sm_unmap+0x10c/0x1c8\n drm_gpuvm_sm_unmap+0x40/0x60\n panthor_vm_exec_op+0xb4/0x3d0 [panthor]\n panthor_vm_bind_exec_sync_op+0x154/0x278 [panthor]\n panthor_ioctl_vm_bind+0x160/0x4a0 [panthor]\n drm_ioctl_kernel+0xbc/0x138\n drm_ioctl+0x240/0x500\n __arm64_sys_ioctl+0xb0/0xf8\n invoke_syscall+0x4c/0x110\n el0_svc_common.constprop.1+0x98/0xf8\n do_el0_svc+0x24/0x38\n el0_svc+0x40/0xf8\n el0t_64_sync_handler+0xa0/0xc8\n el0t_64_sync+0x174/0x178"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/panthor: Soluciona un pánico del kernel en el desmapeo parcial de una región VA de GPU\n\nEste commit aborda un problema de pánico del kernel que puede ocurrir si el espacio de usuario intenta desmapear parcialmente una región virtual de GPU (también conocida como drm_gpuva). La interfaz VM_BIND permite el desmapeo parcial de un BO.\n\nEl controlador Panthor preasigna memoria para las nuevas estructuras drm_gpuva que serían necesarias para la operación de mapeo/desmapeo, realizada utilizando la capa drm_gpuvm. Se esperaba que solo una nueva drm_gpuva fuera necesaria en el desmapeo, pero un desmapeo parcial puede requerir 2 nuevas drm_gpuva y por eso terminó realizando una desreferencia de puntero NULL, causando un pánico del kernel.\n\nSe observó el siguiente volcado cuando se ejecutó el desmapeo parcial.\n No se pudo manejar la desreferencia de puntero NULL del kernel en la dirección virtual 0000000000000078\n Información de aborto de memoria:\n ESR = 0x0000000096000046\n EC = 0x25: DABT (current EL), IL = 32 bits\n SET = 0, FnV = 0\n EA = 0, S1PTW = 0\n FSC = 0x06: level 2 translation fault\n Información de aborto de datos:\n ISV = 0, ISS = 0x00000046, ISS2 = 0x00000000\n CM = 0, WnR = 1, TnD = 0, TagAccess = 0\n GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n tabla de páginas de usuario: páginas de 4k, VAs de 48 bits, pgdp=000000088a863000\n [000000000000078] pgd=080000088a842003, p4d=080000088a842003, pud=0800000884bf5003, pmd=0000000000000000\n Error interno: Oops: 0000000096000046 [#1] PREEMPT SMP\n <recorte>\n pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : panthor_gpuva_sm_step_remap+0xe4/0x330 [panthor]\n lr : panthor_gpuva_sm_step_remap+0x6c/0x330 [panthor]\n sp : ffff800085d43970\n x29: ffff800085d43970 x28: ffff00080363e440 x27: ffff0008090c6000\n x26: 0000000000000030 x25: ffff800085d439f8 x24: ffff00080d402000\n x23: ffff800085d43b60 x22: ffff800085d439e0 x21: ffff00080abdb180\n x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000010\n x17: 6e656c202c303030 x16: 3666666666646466 x15: 393d61766f69202c\n x14: 312d3d7361203a70 x13: 303030323d6e656c x12: ffff80008324bf58\n x11: 0000000000000003 x10: 0000000000000002 x9 : ffff8000801a6a9c\n x8 : ffff00080360b300 x7 : 0000000000000000 x6 : 000000088aa35fc7\n x5 : fff1000080000000 x4 : ffff8000842ddd30 x3 : 0000000000000001\n x2 : 0000000100000000 x1 : 0000000000000001 x0 : 0000000000000078\n Rastro de llamada:\n panthor_gpuva_sm_step_remap+0xe4/0x330 [panthor]\n op_remap_cb.isra.22+0x50/0x80\n __drm_gpuvm_sm_unmap+0x10c/0x1c8\n drm_gpuvm_sm_unmap+0x40/0x60\n panthor_vm_exec_op+0xb4/0x3d0 [panthor]\n panthor_vm_bind_exec_sync_op+0x154/0x278 [panthor]\n panthor_ioctl_vm_bind+0x160/0x4a0 [panthor]\n drm_ioctl_kernel+0xbc/0x138\n drm_ioctl+0x240/0x500\n __arm64_sys_ioctl+0xb0/0xf8\n invoke_syscall+0x4c/0x110\n el0_svc_common.constprop.1+0x98/0xf8\n do_el0_svc+0x24/0x38\n el0_svc+0x40/0xf8\n el0t_64_sync_handler+0xa0/0xc8\n el0t_64_sync+0x174/0x178"
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/gpu/drm/panthor/panthor_mmu.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "647810ec247641eb5aec8caef818919a4518a0b1",
"lessThan": "efe6dced3512066ebee2cf7c4c38d1c99625814e",
"versionType": "git",
"status": "affected"
},
{
"version": "647810ec247641eb5aec8caef818919a4518a0b1",
"lessThan": "e9c19d19dd7e08db89cead5b0337c18590dc6645",
"versionType": "git",
"status": "affected"
},
{
"version": "647810ec247641eb5aec8caef818919a4518a0b1",
"lessThan": "4eabd0d8791eaf9a7b114ccbf56eb488aefe7b1f",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/gpu/drm/panthor/panthor_mmu.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.10",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.10",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.56",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.17.6",
"lessThanOrEqual": "6.17.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/4eabd0d8791eaf9a7b114ccbf56eb488aefe7b1f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e9c19d19dd7e08db89cead5b0337c18590dc6645",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/efe6dced3512066ebee2cf7c4c38d1c99625814e",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}