CVE-2025-40317— regmap: slimbus: fix bus_context pointer in regmap init calls
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I. Basic Information for CVE-2025-40317
Vulnerability Information
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Vulnerability Title
regmap: slimbus: fix bus_context pointer in regmap init calls
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: regmap: slimbus: fix bus_context pointer in regmap init calls Commit 4e65bda8273c ("ASoC: wcd934x: fix error handling in wcd934x_codec_parse_data()") revealed the problem in the slimbus regmap. That commit breaks audio playback, for instance, on sdm845 Thundercomm Dragonboard 845c board: Unable to handle kernel paging request at virtual address ffff8000847cbad4 ... CPU: 5 UID: 0 PID: 776 Comm: aplay Not tainted 6.18.0-rc1-00028-g7ea30958b305 #11 PREEMPT Hardware name: Thundercomm Dragonboard 845c (DT) ... Call trace: slim_xfer_msg+0x24/0x1ac [slimbus] (P) slim_read+0x48/0x74 [slimbus] regmap_slimbus_read+0x18/0x24 [regmap_slimbus] _regmap_raw_read+0xe8/0x174 _regmap_bus_read+0x44/0x80 _regmap_read+0x60/0xd8 _regmap_update_bits+0xf4/0x140 _regmap_select_page+0xa8/0x124 _regmap_raw_write_impl+0x3b8/0x65c _regmap_bus_raw_write+0x60/0x80 _regmap_write+0x58/0xc0 regmap_write+0x4c/0x80 wcd934x_hw_params+0x494/0x8b8 [snd_soc_wcd934x] snd_soc_dai_hw_params+0x3c/0x7c [snd_soc_core] __soc_pcm_hw_params+0x22c/0x634 [snd_soc_core] dpcm_be_dai_hw_params+0x1d4/0x38c [snd_soc_core] dpcm_fe_dai_hw_params+0x9c/0x17c [snd_soc_core] snd_pcm_hw_params+0x124/0x464 [snd_pcm] snd_pcm_common_ioctl+0x110c/0x1820 [snd_pcm] snd_pcm_ioctl+0x34/0x4c [snd_pcm] __arm64_sys_ioctl+0xac/0x104 invoke_syscall+0x48/0x104 el0_svc_common.constprop.0+0x40/0xe0 do_el0_svc+0x1c/0x28 el0_svc+0x34/0xec el0t_64_sync_handler+0xa0/0xf0 el0t_64_sync+0x198/0x19c The __devm_regmap_init_slimbus() started to be used instead of __regmap_init_slimbus() after the commit mentioned above and turns out the incorrect bus_context pointer (3rd argument) was used in __devm_regmap_init_slimbus(). It should be just "slimbus" (which is equal to &slimbus->dev). Correct it. The wcd934x codec seems to be the only or the first user of devm_regmap_init_slimbus() but we should fix it till the point where __devm_regmap_init_slimbus() was introduced therefore two "Fixes" tags. While at this, also correct the same argument in __regmap_init_slimbus().
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于总线上下文指针错误，可能导致内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-40317
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Same Patch Batch · Linux · 2025-12-08 · 82 CVEs total
| CVE-2022-50630 | mm: hugetlb: fix UAF in hugetlb_handle_userfault | |
| CVE-2023-53752 | net: deal with integer overflows in kmalloc_reserve() | |
| CVE-2022-50627 | wifi: ath11k: fix monitor mode bringup crash | |
| CVE-2022-50628 | drm/gud: Fix UBSAN warning | |
| CVE-2022-50626 | media: dvb-usb: fix memory leak in dvb_usb_adapter_init() | |
| CVE-2022-50623 | fpga: prevent integer overflow in dfl_feature_ioctl_set_irq() | |
| CVE-2022-50622 | ext4: fix potential memory leak in ext4_fc_record_modified_inode() | |
| CVE-2022-50621 | dm: verity-loadpin: Only trust verity targets with enforcement | |
| CVE-2022-50620 | f2fs: fix to invalidate dcc->f2fs_issue_discard in error path | |
| CVE-2022-50624 | net: netsec: fix error handling in netsec_register_mdio() | |
| CVE-2022-50629 | wifi: rsi: Fix memory leak in rsi_coex_attach() | |
| CVE-2023-53742 | kcsan: Avoid READ_ONCE() in read_instrumented_memory() | |
| CVE-2023-53743 | PCI: Free released resource after coalescing | |
| CVE-2023-53744 | soc: ti: pm33xx: Fix refcount leak in am33xx_pm_probe | |
| CVE-2023-53745 | um: vector: Fix memory leak in vector_config | |
| CVE-2023-53746 | s390/vfio-ap: fix memory leak in vfio_ap device driver | |
| CVE-2023-53747 | vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF | |
| CVE-2023-53748 | media: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup | |
| CVE-2023-53750 | pinctrl: freescale: Fix a memory out of bounds when num_configs is 1 | |
| CVE-2023-53751 | cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname |
Showing top 20 of 82 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2025-40317
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