comedi: pcl812: Fix bit shift out of bounds (Linux Linux)

CVE-2025-38530
HIGH 7.1

At a glance

Source
NVD
EPSS
EPSS 0.18 % · percentile 8 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: comedi: pcl812: Fix bit shift out of bounds When checking for a supported IRQ number, the following test is used: if ((1 << it->options[1]) & board->irq_bits) { 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. Valid `it->options[1]` values that select the IRQ will be in the range [1,15]. The value 0 explicitly disables the use of interrupts.

Weaknesses (CWE)

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 < 374d9b3eb4b08407997ef1fce96119d31e0c0bc4 ; affected fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 < 0489c30d080f07cc7f09d04de723d8c2ccdb61ef ; affected fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 < 29ef03e5b84431171d6b77b822985b54bc44b793 ; affected fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 < 5bfa301e1e59a9b1a7b62a800b54852337c97416 ; affected fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 < 7e470d8efd10725b189ca8951973a8425932398a ; affected fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 < a27e27eee313fe1c450b6af1e80e64412546cab4
Linux · Linuxaffected 2.6.30 ; unaffected 0 < 2.6.30 ; unaffected 5.4.297 ≤ 5.4.* ; unaffected 5.10.241 ≤ 5.10.* ; unaffected 5.15.190 ≤ 5.15.* ; unaffected 6.1.147 ≤ 6.1.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD