Description
In the Linux kernel, the following vulnerability has been resolved: comedi: das6402: Fix bit shift out of bounds When checking for a supported IRQ number, the following test is used: /* IRQs 2,3,5,6,7, 10,11,15 are valid for "enhanced" mode */ if ((1 << it->options[1]) & 0x8cec) { 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.
Product status
79e5e6addbb18bf56075f0ff552094a28636dd03 (git) before a15e9c175f783298c4ee48146be6841335400406
79e5e6addbb18bf56075f0ff552094a28636dd03 (git) before de8da1063cce9234d55c8270d9bdf4cf84411c80
79e5e6addbb18bf56075f0ff552094a28636dd03 (git) before 73f34d609397805c20d6b2ef5c07a4cbf7c4d63a
79e5e6addbb18bf56075f0ff552094a28636dd03 (git) before a18a42e77545afcacd6a2b8d9fc16191b87454df
79e5e6addbb18bf56075f0ff552094a28636dd03 (git) before 8a3637027ceeba4ca5e500b23cb7d24c25592513
79e5e6addbb18bf56075f0ff552094a28636dd03 (git) before 3eab654f5d199ecd45403c6588cda63e491fcfca
79e5e6addbb18bf56075f0ff552094a28636dd03 (git) before 4a3c18cde02e35aba87e0ad5672b3e1c72dda5a4
79e5e6addbb18bf56075f0ff552094a28636dd03 (git) before 70f2b28b5243df557f51c054c20058ae207baaac
3.15
Any version before 3.15
5.4.297 (semver)
5.10.241 (semver)
5.15.190 (semver)
6.1.147 (semver)
6.6.100 (semver)
6.12.40 (semver)
6.15.8 (semver)
6.16 (original_commit_for_fix)
References
lists.debian.org/debian-lts-announce/2025/10/msg00008.html
lists.debian.org/debian-lts-announce/2025/10/msg00007.html
git.kernel.org/...c/a15e9c175f783298c4ee48146be6841335400406
git.kernel.org/...c/de8da1063cce9234d55c8270d9bdf4cf84411c80
git.kernel.org/...c/73f34d609397805c20d6b2ef5c07a4cbf7c4d63a
git.kernel.org/...c/a18a42e77545afcacd6a2b8d9fc16191b87454df
git.kernel.org/...c/8a3637027ceeba4ca5e500b23cb7d24c25592513
git.kernel.org/...c/3eab654f5d199ecd45403c6588cda63e491fcfca
git.kernel.org/...c/4a3c18cde02e35aba87e0ad5672b3e1c72dda5a4
git.kernel.org/...c/70f2b28b5243df557f51c054c20058ae207baaac