CVE-2025-38481— comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large
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I. Basic Information for CVE-2025-38481
Vulnerability Information
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Vulnerability Title
comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large The handling of the `COMEDI_INSNLIST` ioctl allocates a kernel buffer to hold the array of `struct comedi_insn`, getting the length from the `n_insns` member of the `struct comedi_insnlist` supplied by the user. The allocation will fail with a WARNING and a stack dump if it is too large. Avoid that by failing with an `-EINVAL` error if the supplied `n_insns` value is unreasonable. Define the limit on the `n_insns` value in the `MAX_INSNS` macro. Set this to the same value as `MAX_SAMPLES` (65536), which is the maximum allowed sum of the values of the member `n` in the array of `struct comedi_insn`, and sensible comedi instructions will have an `n` of at least 1.
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，该漏洞源于未验证n_insns大小，可能导致内存分配失败。
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-2025-38481
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Same Patch Batch · Linux · 2025-07-28 · 29 CVEs total
| CVE-2025-38484 | iio: backend: fix out-of-bound write | |
| CVE-2025-38497 | usb: gadget: configfs: Fix OOB read on empty string write | |
| CVE-2025-38496 | dm-bufio: fix sched in atomic context | |
| CVE-2025-38495 | HID: core: ensure the allocated report buffer can contain the reserved report ID | |
| CVE-2025-38494 | HID: core: do not bypass hid_hw_raw_request | |
| CVE-2025-38493 | tracing/osnoise: Fix crash in timerlat_dump_stack() | |
| CVE-2025-38492 | netfs: Fix race between cache write completion and ALL_QUEUED being set | |
| CVE-2025-38491 | mptcp: make fallback action and fallback decision atomic | |
| CVE-2025-38490 | net: libwx: remove duplicate page_pool_put_full_page() | |
| CVE-2025-38489 | s390/bpf: Fix bpf_arch_text_poke() with new_addr == NULL again | |
| CVE-2025-38488 | smb: client: fix use-after-free in crypt_message when using async crypto | |
| CVE-2025-38487 | soc: aspeed: lpc-snoop: Don't disable channels that aren't enabled | |
| CVE-2025-38485 | iio: accel: fxls8962af: Fix use after free in fxls8962af_fifo_flush | |
| CVE-2025-38486 | soundwire: Revert "soundwire: qcom: Add set_channel_map api support" | |
| CVE-2025-38468 | net/sched: Return NULL when htb_lookup_leaf encounters an empty rbtree | |
| CVE-2025-38483 | comedi: das16m1: Fix bit shift out of bounds | |
| CVE-2025-38482 | comedi: das6402: Fix bit shift out of bounds | |
| CVE-2025-38480 | comedi: Fix use of uninitialized data in insn_rw_emulate_bits() | |
| CVE-2025-38478 | comedi: Fix initialization of data for instructions that write to subdevice | |
| CVE-2025-38477 | net/sched: sch_qfq: Fix race condition on qfq_aggregate |
Showing top 20 of 29 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-2025-38481
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