{"id":"CVE-2026-90124","summary":"irqchip/renesas-rzg2l: Fix loss of interrupt","details":"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 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.","modified":"2026-09-19T03:47:28.649769114Z","published":"2026-09-17T16:06:27.254Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90124.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3791e242ec2e5a5cd9e010a75ed1125d0e84d394"},{"type":"WEB","url":"https://git.kernel.org/stable/c/38c6831fefde0ff89f8d2dcb924f957a89dec414"},{"type":"WEB","url":"https://git.kernel.org/stable/c/50b10bd0c2d721ad38abd1abe3acdefb6caa0944"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b5ba8b861b5d833394bd23df3f4b59883ef18c88"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c043591f03a8111f7d306b8122c444a949486269"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dbecbe23dc606c4af68b4591a41124186f5c1802"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90124.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90124"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3fed09559cd8be79568d368ce02bf7f2d56259b6"},{"fixed":"c043591f03a8111f7d306b8122c444a949486269"},{"fixed":"b5ba8b861b5d833394bd23df3f4b59883ef18c88"},{"fixed":"3791e242ec2e5a5cd9e010a75ed1125d0e84d394"},{"fixed":"38c6831fefde0ff89f8d2dcb924f957a89dec414"},{"fixed":"dbecbe23dc606c4af68b4591a41124186f5c1802"},{"fixed":"50b10bd0c2d721ad38abd1abe3acdefb6caa0944"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90124.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90124.json"}}],"schema_version":"1.9.0"}