{"id":"CVE-2026-90124","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nirqchip/renesas-rzg2l: Fix loss of interrupt\n\nrzg2l_clear_irq_int() and rzg2l_clear_tint_int() perform a\nread-modify-write on the ISCR/TSCR status registers to clear th…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nirqchip/renesas-rzg2l: Fix loss of interrupt\n\nrzg2l_clear_irq_int() and rzg2l_clear_tint_int() perform a\nread-modify-write on the ISCR/TSCR status registers to clear th…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 3fed09559cd8be79568d368ce02bf7f2d56259b6 < c043591f03a8111f7d306b8122c444a949486269","Linux >= 3fed09559cd8be79568d368ce02bf7f2d56259b6 < b5ba8b861b5d833394bd23df3f4b59883ef18c88","Linux >= 3fed09559cd8be79568d368ce02bf7f2d56259b6 < 3791e242ec2e5a5cd9e010a75ed1125d0e84d394","Linux >= 3fed09559cd8be79568d368ce02bf7f2d56259b6 < 38c6831fefde0ff89f8d2dcb924f957a89dec414","Linux >= 3fed09559cd8be79568d368ce02bf7f2d56259b6 < dbecbe23dc606c4af68b4591a41124186f5c1802","Linux >= 3fed09559cd8be79568d368ce02bf7f2d56259b6 < 50b10bd0c2d721ad38abd1abe3acdefb6caa0944","Linux 6.0"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:04.650","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90124","references":[{"url":"https://git.kernel.org/stable/c/3791e242ec2e5a5cd9e010a75ed1125d0e84d394","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/38c6831fefde0ff89f8d2dcb924f957a89dec414","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/50b10bd0c2d721ad38abd1abe3acdefb6caa0944","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b5ba8b861b5d833394bd23df3f4b59883ef18c88","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c043591f03a8111f7d306b8122c444a949486269","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dbecbe23dc606c4af68b4591a41124186f5c1802","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.883Z","epss":0.00206,"epssPercentile":0.10938,"slug":"CVE-2026-90124","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nirqchip/renesas-rzg2l: Fix loss of interrupt\n\nrzg2l_clear_irq_int() and rzg2l_clear_tint_int() perform a\nread-modify-write on the ISCR/TSCR status registers to clear the bit\nfor the interrupt just handled. Since these registers are\nwrite-0-to-clear per bit, this is racy:\n\nIf another interrupt's status bit gets set between the read and the write,\nthat bit is written back as 0 by the software-constructed value, clearing\nan interrupt that hasn't been serviced yet and losing it.\n\nThis can be reproduced by triggering multiple interrupts at once, e.g.:\n\n  gpioset -c gpiochip0 355=0 353=0 328=0 352=0\n\nFix this by writing back only the bit being cleared, with all other bits\nset to 1, instead of read-modify-writing the whole register.  Since 1-bits\nare left unchanged by hardware, concurrently-set status bits for other\ninterrupts are preserved.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}