CVE-2025-38481

MEDIUM EPSS 5.2%

Published Jul 28, 202511mo ago · Modified Jun 17, 20262w ago

5.5 CVSS 3.1

Medium

Published Jul 28, 2025 11mo ago

Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score

5.5

Exploitability

1.8

Impact

3.6

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector Local

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Unchanged

Confidentiality None

Integrity None

Availability High

Threat Intelligence

EPSS Exploit Probability

5.2% percentile

Exploit & Patch Status

No Known Exploit

Patch Available

Affected Products 14

Vendor	Product	Version	Range
linux	linux_kernel	*	≥2.6.29 – <5.4.297
linux	linux_kernel	*	≥5.5 – <5.10.241
linux	linux_kernel	*	≥5.11 – <5.15.190
linux	linux_kernel	*	≥5.16 – <6.1.147
linux	linux_kernel	*	≥6.2 – <6.6.100
linux	linux_kernel	*	≥6.7 – <6.12.40
linux	linux_kernel	*	≥6.13 – <6.15.8
linux	linux_kernel	6.16	any
linux	linux_kernel	6.16	any
linux	linux_kernel	6.16	any
linux	linux_kernel	6.16	any
linux	linux_kernel	6.16	any
linux	linux_kernel	6.16	any
debian	debian_linux	11.0	any

References 10

git.kernel.org https://git.kernel.org/stable/c/08ae4b20f5e82101d77326ecab9089e110f224cc

Patch
git.kernel.org https://git.kernel.org/stable/c/454d732dfd0aef7d7aa950c409215ca06d717e93

Patch
git.kernel.org https://git.kernel.org/stable/c/69dc06b9514522de532e997a21d035cd29b0db44

Patch
git.kernel.org https://git.kernel.org/stable/c/992d600f284e719242a434166e86c1999649b71c

Patch
git.kernel.org https://git.kernel.org/stable/c/c68257588e87f45530235701a42496b7e9e56adb

Patch
git.kernel.org https://git.kernel.org/stable/c/c9d3d9667443caafa804cd07940aeaef8e53aa90

Patch
git.kernel.org https://git.kernel.org/stable/c/d4c73ce13f5b5a0fe0319f1f352ff602f0ace8e3

Patch
git.kernel.org https://git.kernel.org/stable/c/e3b8322cc8081d142ee4c1a43e1d702bdba1ed76

Patch
lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html

Third Party Advisory
lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html

Third Party Advisory

Remediation

git.kernel.org https://git.kernel.org/stable/c/08ae4b20f5e82101d77326ecab9089e110f224cc

Patch
git.kernel.org https://git.kernel.org/stable/c/454d732dfd0aef7d7aa950c409215ca06d717e93

Patch
git.kernel.org https://git.kernel.org/stable/c/69dc06b9514522de532e997a21d035cd29b0db44

Patch
git.kernel.org https://git.kernel.org/stable/c/992d600f284e719242a434166e86c1999649b71c

Patch
git.kernel.org https://git.kernel.org/stable/c/c68257588e87f45530235701a42496b7e9e56adb

Patch
git.kernel.org https://git.kernel.org/stable/c/c9d3d9667443caafa804cd07940aeaef8e53aa90

Patch
git.kernel.org https://git.kernel.org/stable/c/d4c73ce13f5b5a0fe0319f1f352ff602f0ace8e3

Patch
git.kernel.org https://git.kernel.org/stable/c/e3b8322cc8081d142ee4c1a43e1d702bdba1ed76

Patch