Description
In 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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
fff46207245cd9e39c05b638afaee2478e64914b to < bab220b0bb5af652007e278e8e8357f952b0e1eaaffectedfff46207245cd9e39c05b638afaee2478e64914b to < 5a33d07c94ba91306093e823112a7aa9727549f6affectedfff46207245cd9e39c05b638afaee2478e64914b to < 0eb4ed2aa261dee228f1668dbfa6d87353e8162daffectedfff46207245cd9e39c05b638afaee2478e64914b to < a3cfcd0c78c80ca7cd80372dc28f77d01be57bf6affectedfff46207245cd9e39c05b638afaee2478e64914b to < d8992c9a01f81128f36acb7c5755530e21fcd059affectedfff46207245cd9e39c05b638afaee2478e64914b to < 96cb948408b3adb69df7e451ba7da9d21f814d00affected
Linux Linux
Default version status: affected
3.13affected0 to < 3.13unaffected5.15.190 to ≤ 5.15.*unaffected6.1.149 to ≤ 6.1.*unaffected6.6.103 to ≤ 6.6.*unaffected6.12.44 to ≤ 6.12.*unaffected6.16.4 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/bab220b0bb5af652007e278e8e8357f952b0e1ea ↗
- https://git.kernel.org/stable/c/5a33d07c94ba91306093e823112a7aa9727549f6 ↗
- https://git.kernel.org/stable/c/0eb4ed2aa261dee228f1668dbfa6d87353e8162d ↗
- https://git.kernel.org/stable/c/a3cfcd0c78c80ca7cd80372dc28f77d01be57bf6 ↗
- https://git.kernel.org/stable/c/d8992c9a01f81128f36acb7c5755530e21fcd059 ↗
- https://git.kernel.org/stable/c/96cb948408b3adb69df7e451ba7da9d21f814d00 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html ↗