CVE-2025-38483
In the Linux kernel, the following vulnerability has been resolved: comedi: das16m1: Fix bit shift out of bounds When checking for a supported IRQ number, the following test is used: /* only irqs 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, and 15 are valid */ if…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: comedi: das16m1: Fix bit shift out of bounds When checking for a supported IRQ number, the following test is used: /* only irqs 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, and 15 are valid */ if ((1 << it->options[1]) & 0xdcfc) { However, `it->options[i]` is an unchecked `int` value from userspace, so the shift amount could be negative or out of bounds. Fix the test by requiring `it->options[1]` to be within bounds before proceeding with the original test.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.16% probability · 6th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/076b13ee60eb01ed0d140ef261f95534562a3077Patch
- https://git.kernel.org/stable/c/539bdff832adac9ea653859fa0b6bc62e743329cPatch
- https://git.kernel.org/stable/c/65c03e6fc524eb2868abedffd8a4613d78abc288Patch
- https://git.kernel.org/stable/c/adb7df8a8f9d788423e161b779764527dd3ec2d0Patch
- https://git.kernel.org/stable/c/b3c95fa508e5dc3da60520eea92a5241095ceef1Patch
- https://git.kernel.org/stable/c/d1291c69f46d6572b2cf75960dd8975d7ab2176bPatch
- https://git.kernel.org/stable/c/ed93c6f68a3be06e4e0c331c6e751f462dee3932Patch
- https://git.kernel.org/stable/c/f211572818ed5bec2b3f5d4e0719ef8699b3c269Patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.