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CVE-2026-90124— irqchip/renesas-rzg2l: Fix loss of interrupt

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： irqchip/renesas-rzg2l：修复中断丢失问题 和 函数对 ISCR/TSCR 状态寄存器执行“读-改-写”操作，以清除刚刚处理完的中断对应的位。由于这些寄存器采用“写 0 清除位”的机制（write-0-to-clear），这种读-改-写过程存在竞态条件： 如果在读取和写回之间，另一个中断的状态位被硬件置位，那么软件构造的写回值会将该位写为 0，从而清除了一个尚未被服务的中断，导致该中断被“丢失”。 此问题可通过同时触发多个中断来复现，例如执行： 修复方

AI Predicted 4.4 Difficulty: Hard EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1025 · Data from Removable Media

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 3fed09559cd8be79568d368ce02bf7f2d56259b6< c043591f03a8111f7d306b8122c444a949486269 affected
3fed09559cd8be79568d368ce02bf7f2d56259b6< b5ba8b861b5d833394bd23df3f4b59883ef18c88 affected
3fed09559cd8be79568d368ce02bf7f2d56259b6< 3791e242ec2e5a5cd9e010a75ed1125d0e84d394 affected
3fed09559cd8be79568d368ce02bf7f2d56259b6< 38c6831fefde0ff89f8d2dcb924f957a89dec414 affected
3fed09559cd8be79568d368ce02bf7f2d56259b6< dbecbe23dc606c4af68b4591a41124186f5c1802 affected
3fed09559cd8be79568d368ce02bf7f2d56259b6< 50b10bd0c2d721ad38abd1abe3acdefb6caa0944 affected
6.0 affected
< 6.0 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-90124

Vulnerability Information
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Vulnerability Title
irqchip/renesas-rzg2l: Fix loss of interrupt
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: irqchip/renesas-rzg2l: Fix loss of interrupt rzg2l_clear_irq_int() and rzg2l_clear_tint_int() perform a read-modify-write on the ISCR/TSCR status registers to clear the bit for the interrupt just handled. Since these registers are write-0-to-clear per bit, this is racy: If another interrupt's status bit gets set between the read and the write, that bit is written back as 0 by the software-constructed value, clearing an interrupt that hasn't been serviced yet and losing it. This can be reproduced by triggering multiple interrupts at once, e.g.: gpioset -c gpiochip0 355=0 353=0 328=0 352=0 Fix this by writing back only the bit being cleared, with all other bits set to 1, instead of read-modify-writing the whole register. Since 1-bits are left unchanged by hardware, concurrently-set status bits for other interrupts are preserved.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 3fed09559cd8be79568d368ce02bf7f2d56259b6 ~ c043591f03a8111f7d306b8122c444a949486269 -
Linux Linux 6.0 -

II. Public POCs for CVE-2026-90124

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III. Intelligence Information for CVE-2026-90124

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Patches & Fixes for CVE-2026-90124 (6)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90286 8.8 HIGH drm/amdgpu/gfx6: Use PFP on the compute queues too
CVE-2026-90255 8.8 HIGH Bluetooth: hci_conn: fix the SCO setup context lifetime
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90162 8.8 HIGH ksmbd: defer publishing granted locks to prevent UAF/double-free race
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-90124

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