CVE-2023-53532
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
wifi: ath11k: fix deinitialization of firmware resources
Currently, in ath11k_ahb_fw_resources_init(), iommu domain mapping is done only for the chipsets having fixed firmware memory. Also, for such chipsets, mapping is done only if it does not have TrustZone support.
During deinitialization, only if TrustZone support is not there, iommu is unmapped back. However, for non fixed firmware memory chipsets, TrustZone support is not there and this makes the condition check to true and it tries to unmap the memory which was not mapped during initialization.
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This leads to the following trace -
This can be reproduced by probing an AHB chipset which is not having a fixed memory region. During reboot (or rmmod) trace can be seen.
Fix this issue by adding a condition check on firmware fixed memory hw_param as done in the counter initialization function.
Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1
Detalles técnicos trazas, registros y código del informe original
[ 83.198790] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 [ 83.259537] Modules linked in: ath11k_ahb ath11k qmi_helpers .. snip .. [ 83.280286] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 83.287228] pc : __iommu_unmap+0x30/0x140 [ 83.293907] lr : iommu_unmap+0x5c/0xa4 [ 83.298072] sp : ffff80000b3abad0 .. snip .. [ 83.369175] Call trace: [ 83.376282] __iommu_unmap+0x30/0x140 [ 83.378541] iommu_unmap+0x5c/0xa4 [ 83.382360] ath11k_ahb_fw_resource_deinit.part.12+0x2c/0xac [ath11k_ahb] [ 83.385666] ath11k_ahb_free_resources+0x140/0x17c [ath11k_ahb] [ 83.392521] ath11k_ahb_shutdown+0x34/0x40 [ath11k_ahb] [ 83.398248] platform_shutdown+0x20/0x2c [ 83.403455] device_shutdown+0x16c/0x1c4 [ 83.407621] kernel_restart_prepare+0x34/0x3c [ 83.411529] kernel_restart+0x14/0x74 [ 83.415781] __do_sys_reboot+0x1c4/0x22c [ 83.419427] __arm64_sys_reboot+0x1c/0x24 [ 83.423420] invoke_syscall+0x44/0xfc [ 83.427326] el0_svc_common.constprop.3+0xac/0xe8 [ 83.430974] do_el0_svc+0xa0/0xa8 [ 83.435659] el0_svc+0x1c/0x44 [ 83.438957] el0t_64_sync_handler+0x60/0x144 [ 83.441910] el0t_64_sync+0x15c/0x160 [ 83.446343] Code: aa0103f4 f9400001 f90027a1 d2800001 (f94006a0) [ 83.449903] ---[ end trace 0000000000000000 ]---
CVSS
- 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: 0.14%
- Percentil entre todas las CVEs puntuadas: 3
- 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-908
Referencias
JSON original (NVD)
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{
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"source": "nvd@nist.gov",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
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"attackComplexity": "LOW",
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"published": "2025-10-01T12:15:57.993",
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"descriptions": [
{
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath11k: fix deinitialization of firmware resources\n\nCurrently, in ath11k_ahb_fw_resources_init(), iommu domain\nmapping is done only for the chipsets having fixed firmware\nmemory. Also, for such chipsets, mapping is done only if it\ndoes not have TrustZone support.\n\nDuring deinitialization, only if TrustZone support is not there,\niommu is unmapped back. However, for non fixed firmware memory\nchipsets, TrustZone support is not there and this makes the\ncondition check to true and it tries to unmap the memory which\nwas not mapped during initialization.\n\nThis leads to the following trace -\n\n[ 83.198790] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008\n[ 83.259537] Modules linked in: ath11k_ahb ath11k qmi_helpers\n.. snip ..\n[ 83.280286] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 83.287228] pc : __iommu_unmap+0x30/0x140\n[ 83.293907] lr : iommu_unmap+0x5c/0xa4\n[ 83.298072] sp : ffff80000b3abad0\n.. snip ..\n[ 83.369175] Call trace:\n[ 83.376282] __iommu_unmap+0x30/0x140\n[ 83.378541] iommu_unmap+0x5c/0xa4\n[ 83.382360] ath11k_ahb_fw_resource_deinit.part.12+0x2c/0xac [ath11k_ahb]\n[ 83.385666] ath11k_ahb_free_resources+0x140/0x17c [ath11k_ahb]\n[ 83.392521] ath11k_ahb_shutdown+0x34/0x40 [ath11k_ahb]\n[ 83.398248] platform_shutdown+0x20/0x2c\n[ 83.403455] device_shutdown+0x16c/0x1c4\n[ 83.407621] kernel_restart_prepare+0x34/0x3c\n[ 83.411529] kernel_restart+0x14/0x74\n[ 83.415781] __do_sys_reboot+0x1c4/0x22c\n[ 83.419427] __arm64_sys_reboot+0x1c/0x24\n[ 83.423420] invoke_syscall+0x44/0xfc\n[ 83.427326] el0_svc_common.constprop.3+0xac/0xe8\n[ 83.430974] do_el0_svc+0xa0/0xa8\n[ 83.435659] el0_svc+0x1c/0x44\n[ 83.438957] el0t_64_sync_handler+0x60/0x144\n[ 83.441910] el0t_64_sync+0x15c/0x160\n[ 83.446343] Code: aa0103f4 f9400001 f90027a1 d2800001 (f94006a0)\n[ 83.449903] ---[ end trace 0000000000000000 ]---\n\nThis can be reproduced by probing an AHB chipset which is not\nhaving a fixed memory region. During reboot (or rmmod) trace\ncan be seen.\n\nFix this issue by adding a condition check on firmware fixed memory\nhw_param as done in the counter initialization function.\n\nTested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1"
}
],
"lastModified": "2026-06-17T06:45:32.760",
"configurations": [
{
"nodes": [
{
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}