CVE-2026-98564net: dsa: mt7530: leave the MDIO IRQ mappings to regmap-irq
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: net: dsa: mt7530: leave the MDIO IRQ mappings to regmap-irq mt7530_remove_common() disposes the per-PHY interrupt mappings from .remove, but the regmap-irq chip that owns the domain is devm-registered, so its parent interrupt is only freed once .remove has returned. The switch's own regmap-irq thread can therefore still dispatch on a mapping that is already gone: irq_find_mapping() returns 0, irq_to_desc() returns NULL and handle_nested_irq() locks desc->lock without checking it. The attached PHYs have not given those interrupts back yet either, which the kernel warns about a moment before the fault. regmap_del_irq_chip() disposes the same mappings itself, after freeing the parent interrupt and before removing the domain, so there is nothing left for the driver to do here. Until it runs the descriptors stay alive, and a late dispatch on one of them is harmless: dsa_unregister_switch() has freed the PHY handlers by then, so handle_nested_irq() finds no action and returns.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from 254f6b272e3b67bf31c42ee9da62a449d74d1478 before 2357c682f6eaf639dec88c68b3c0c93a3b802635; from 254f6b272e3b67bf31c42ee9da62a449d74d1478 before f306e465b5a2091cd3fe3dd0feb10cfc94cfb2f8; 254f6b272e3b67bf31c42ee9da62a449d74d1478 builds before 0d80ba0a204c6a16bd7778b50de578dff107c0fe | CNA record |
References
- https://git.kernel.org/stable/c/2357c682f6eaf639dec88c68b3c0c93a3b802635
- https://git.kernel.org/stable/c/f306e465b5a2091cd3fe3dd0feb10cfc94cfb2f8
- https://git.kernel.org/stable/c/0d80ba0a204c6a16bd7778b50de578dff107c0fe
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.