CVE-2025-39685

NameCVE-2025-39685
DescriptionIn the Linux kernel, the following vulnerability has been resolved: comedi: pcl726: Prevent invalid irq number The reproducer passed in an irq number(0x80008000) that was too large, which triggered the oob. Added an interrupt number check to prevent users from passing in an irq number that was too large. If `it->options[1]` is 31, then `1 << it->options[1]` is still invalid because it shifts a 1-bit into the sign bit (which is UB in C). Possible solutions include reducing the upper bound on the `it->options[1]` value to 30 or lower, or using `1U << it->options[1]`. The old code would just not attempt to request the IRQ if the `options[1]` value were invalid. And it would still configure the device without interrupts even if the call to `request_irq` returned an error. So it would be better to combine this test with the test below.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-6008-1, DSA-6009-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)bullseye5.10.223-1vulnerable
bullseye (security)5.10.237-1vulnerable
bookworm6.1.148-1vulnerable
bookworm (security)6.1.153-1fixed
trixie6.12.43-1vulnerable
trixie (security)6.12.48-1fixed
forky6.16.7-1fixed
sid6.16.8-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcebookworm6.1.153-1DSA-6009-1
linuxsourcetrixie6.12.48-1DSA-6008-1
linuxsource(unstable)6.16.5-1

Notes

https://git.kernel.org/linus/96cb948408b3adb69df7e451ba7da9d21f814d00 (6.17-rc3)

Search for package or bug name: Reporting problems