{"id":"CVE-2026-90124","state":"PUBLISHED","title":"irqchip/renesas-rzg2l: Fix loss of interrupt","description":"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.","publishedAt":"2026-09-17T16:06:27.254Z","updatedAt":"2026-10-19T08:58:22.566Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3fed09559cd8be79568d368ce02bf7f2d56259b6","status":"affected","lessThan":"c043591f03a8111f7d306b8122c444a949486269","versionType":"git"},{"version":"3fed09559cd8be79568d368ce02bf7f2d56259b6","status":"affected","lessThan":"b5ba8b861b5d833394bd23df3f4b59883ef18c88","versionType":"git"},{"version":"3fed09559cd8be79568d368ce02bf7f2d56259b6","status":"affected","lessThan":"3791e242ec2e5a5cd9e010a75ed1125d0e84d394","versionType":"git"},{"version":"3fed09559cd8be79568d368ce02bf7f2d56259b6","status":"affected","lessThan":"38c6831fefde0ff89f8d2dcb924f957a89dec414","versionType":"git"},{"version":"3fed09559cd8be79568d368ce02bf7f2d56259b6","status":"affected","lessThan":"dbecbe23dc606c4af68b4591a41124186f5c1802","versionType":"git"},{"version":"3fed09559cd8be79568d368ce02bf7f2d56259b6","status":"affected","lessThan":"50b10bd0c2d721ad38abd1abe3acdefb6caa0944","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/irqchip/irq-renesas-rzg2l.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/irqchip/irq-renesas-rzg2l.c"]}],"references":["https://git.kernel.org/stable/c/c043591f03a8111f7d306b8122c444a949486269","https://git.kernel.org/stable/c/b5ba8b861b5d833394bd23df3f4b59883ef18c88","https://git.kernel.org/stable/c/3791e242ec2e5a5cd9e010a75ed1125d0e84d394","https://git.kernel.org/stable/c/38c6831fefde0ff89f8d2dcb924f957a89dec414","https://git.kernel.org/stable/c/dbecbe23dc606c4af68b4591a41124186f5c1802","https://git.kernel.org/stable/c/50b10bd0c2d721ad38abd1abe3acdefb6caa0944"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90124.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90124","state":"PUBLISHED","datePublished":"2026-09-17T16:06:27.254Z","dateUpdated":"2026-10-19T08:58:22.566Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.788Z"},"containers":{"cna":{"title":"irqchip/renesas-rzg2l: Fix loss of interrupt","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3fed09559cd8be79568d368ce02bf7f2d56259b6","status":"affected","lessThan":"c043591f03a8111f7d306b8122c444a949486269","versionType":"git"},{"version":"3fed09559cd8be79568d368ce02bf7f2d56259b6","status":"affected","lessThan":"b5ba8b861b5d833394bd23df3f4b59883ef18c88","versionType":"git"},{"version":"3fed09559cd8be79568d368ce02bf7f2d56259b6","status":"affected","lessThan":"3791e242ec2e5a5cd9e010a75ed1125d0e84d394","versionType":"git"},{"version":"3fed09559cd8be79568d368ce02bf7f2d56259b6","status":"affected","lessThan":"38c6831fefde0ff89f8d2dcb924f957a89dec414","versionType":"git"},{"version":"3fed09559cd8be79568d368ce02bf7f2d56259b6","status":"affected","lessThan":"dbecbe23dc606c4af68b4591a41124186f5c1802","versionType":"git"},{"version":"3fed09559cd8be79568d368ce02bf7f2d56259b6","status":"affected","lessThan":"50b10bd0c2d721ad38abd1abe3acdefb6caa0944","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/irqchip/irq-renesas-rzg2l.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/irqchip/irq-renesas-rzg2l.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c043591f03a8111f7d306b8122c444a949486269"},{"url":"https://git.kernel.org/stable/c/b5ba8b861b5d833394bd23df3f4b59883ef18c88"},{"url":"https://git.kernel.org/stable/c/3791e242ec2e5a5cd9e010a75ed1125d0e84d394"},{"url":"https://git.kernel.org/stable/c/38c6831fefde0ff89f8d2dcb924f957a89dec414"},{"url":"https://git.kernel.org/stable/c/dbecbe23dc606c4af68b4591a41124186f5c1802"},{"url":"https://git.kernel.org/stable/c/50b10bd0c2d721ad38abd1abe3acdefb6caa0944"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:58:22.566Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}