Bug 2536748 (CVE-2026-90123) - CVE-2026-90123 kernel: irqchip/ast2700-intc: Avoid allocating in the irq_domain activate() callback
Summary: CVE-2026-90123 kernel: irqchip/ast2700-intc: Avoid allocating in the irq_doma...
Keywords:
Status: NEW
Alias: CVE-2026-90123
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-17 19:24 UTC by OSIDB Bzimport
Modified: 2026-10-13 12:45 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


Attachments (Terms of Use)

Description OSIDB Bzimport 2026-09-17 19:24:50 UTC
In the Linux kernel, the following vulnerability has been resolved:

irqchip/ast2700-intc: Avoid allocating in the irq_domain activate() callback

The interrupt core calls the irq_domain_activate() callback from
__setup_irq() with desc->lock held and interrupts disabled. Both
aspeed_intc1_irq_domain_activate() and aspeed_intc0_resolve_route() test a
compatible string with fwnode_device_is_compatible().

fwnode_device_is_compatible() invokes fwnode_property_match_string(), which
allocates with GFP_KERNEL. That's obviously not possible with interrupts
disabled and a raw spinlock held.

Both call sites are only ever handed OF nodes, so use
of_device_is_compatible() instead: it walks the property in place and does
not allocate.


Note You need to log in before you can comment on or make changes to this bug.